Cadastral Publication Guideline and Template · Cadastral Publication Data Components ......
Transcript of Cadastral Publication Guideline and Template · Cadastral Publication Data Components ......
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CadastralDataPublicationGuideline–May2009(FinalCorrectionsOctober2009)
CadastralDataPublicationGuideline
May2009FinalCorrections–October2009
FGDCSubcommitteeforCadastralData
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CadastralDataPublicationGuideline–May2009(FinalCorrectionsOctober2009)
Cadastral Data Publication Guideline Table of Contents
1. Purpose.............................................................................................................12. Business Applications ....................................................................................33. Terminology and Key Concepts.....................................................................43.1CadastralDataandTheCadastralNSDI...........................................................43.2Production,PublicationandProjectData .........................................................53.3DataStewards ................................................................................................63.4Organizations .................................................................................................73.5GeographicCoordinateDatabase ....................................................................8
4.TheCadastralPublicationDataComponents..........................................................94.1SampleImplementation ................................................................................11
5.CharacteristicsoftheCadastralPublicationData .................................................136.PoliciesfortheCadastralPublicationData...........................................................137.BusinessProcessesandtheCadastralNSDI ..........................................................158.CadastralPublicationGuideline–ImplementationTemplates ..............................168.1SupplementalInformation.............................................................................168.2CadastralNSDI–CadastralReference ............................................................168.3CadastralNSDICoreDataforParcels .............................................................19
AppendixA–DatabaseImplementationTemplateDetails .......................................21AppendixB–PLSSCornerStandardIdentifier..........................................................47References ............................................................................................................50
Note on this version: The Cadastral Core Data elements were developed over several years of analysis of business requirements for parcel information by the FGDC Cadastral Subcommittee. The data elements in the core data were defined in 2008 and have remained stable through several additional tests and analysis. The updates in this version are grammatical and syntactical.
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CadastralDataPublicationGuidelineMay2009–FinalCorrectionsOctober2009
1. Purpose TheCadastralDataPublicationGuidelinedescribestheminimumsetofattributesaboutlandparcelsandassociatedreferencedatathatareusedforpublicationanddistributionofcadastralinformationbycadastraldataproducers.Thetemplatesthataccompanytheguidelineprovidephysicalimplementformatsanddatastructuresforthepublicationdatasets.TheFederalGeographicDataCommittee(FGDC)CadastralSubcommitteecompletedtheCadastralDataContentStandard1in1995.Intheyearsthatfollowedthisstandardwassubjectedtonumerousreviewsandvalidationtestsresultinginaseriesofupdatesthatclarifiedthecontentandrefinedthedefinitions.BecausetheContentStandardispresentedasalogicalitdoesnotprovidespecificimplementdirection.In2000theSubcommitteebeganaseriesofstudiesontheusesandapplicationsforcadastraldata.ManybusinessprofileswerestudiedstartingwithtwoforumsinpartnershipwiththeWesternGovernors’Association(WGA)andfollowedwithstudiesofhurricaneandwildlandfireresponse,energymanagementneeds,usesofparceldatabyfederalagenciesandmostrecentlymortgageandrealestateanalysis.FromthisbodyofworktheSubcommitteedefinedalimitedsetofattributesthatprovideaplatformsupportingthesebusinessneeds.Thecadastralpublicationdataisdataprovidedbycadastraldataproducersinastandardformonaregularbasis.Cadastralpublicationdatahastwoprimarycomponents,landparceldataandcadastralreferencedata.Itisimportanttorecognizethatthepublicationdataarenotthesameastheoperationandmaintenanceorproductiondata.Theproductiondataisstructuredtooptimizemaintenanceprocesses,isintegratedwithinternalagencyoperationsandcontainsmuchmoredetailthanthepublicationdata.Thepublicationdataisasubsetofthemorecompleteproductiondataandisreformattedtomeetanationalstandardsodatacanbeintegratedacrossjurisdictionalboundariesandbepresentedinaconsistentandstandardformnationally.Theminimumsetofattributesaboutlandparcelsandthecadastralreferenceprovideaplatformuponwhichapplicationscanbebuiltandbusinessneedscanbemet.Theconceptofadataplatformrecognizesthatcadastraldataisabasisuponwhichmanyotherthemesanddatasetsarereferenced.Forexamplelandparceldatacouldbeusedtospatiallyenablebusinesslicense,voterregistration orhealthstatisticinformation.Theuseofthecadastraldataasaplatformforotherapplicationsistheprimary driver
1 CadastralSubcommittee,FGDCCadastralDataContentStandardversion1.3,May2003,http://www.nationalcad.org/data/documents/CADSTAND.v.1.3.pdf
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fortheneedforstandardizedattributes.Inorderforapplicationstorelyonandusethelandcadastralinformationitmustbestandardizedacrossjurisdictionalboundaries.Thisalsoemphasizestheimportanceofthestandardizationofthesmallsetofattributes.Jurisdictionsmayexpandupontheminimumsetandsomeapplicationsmayneedadditionalattributes,buthavingashortlistofstandardizedattributesshouldmakelinkageorotherdatasetspossibleandallowfortheexpansionandindividualizationofpublisheddata.Therearetwootherimportantnotesaboutthecadastraldataplatform.Parceldatachangesfrequentlyandneedstobeupdatedregularly.Manyoftheinitialneedsofthebusinessapplicationsstudiedcanbemetwithannualparcelupdates,butintheendallbusinessapplicationsneedcurrentdata.Thereforeunlikemanyotherspatialframeworkdatasets,cadastralinformationiscontinuallyupdated.Thesecondnoteisthatallspatialdatashouldhaveaccompanyingmetadatadescribingtheproductionagency,contactinformation,spatialreferencingandaccuracyandcurrency.Thetemplatesforimplementationarebynecessitybasedonthespecificneedsofsoftwareanddatabasesystems.Thetemplatesareprovidedasimplementationguidanceanddefineaminimumsetofattributesthatcanbeexpectedtobepresent,iftheyexist,foranypublisheddataset.Thetemplatesare“flattened”or“denormalized”tominimizerelatedtablesanddomainsofvaluesandtominimizedatabaseorsoftwaremanipulationthatmaybeneededtousethedata.Thefieldtypesarealsospecifictoimplementationforexamplenon‐numericfieldsmaybetermedstring,nvarchar,characterortext.Similarissuessurroundnumericanddatefields.Thereforeitisexpectedthateverysoftwarewillhaveaslightlydifferentimplementationbutitiftheresultingdataareassimilaraspossibleitshouldbepossibletoreachanationalstandard.ThisdocumentdescribestheCadastralDataPublicationGuidelineanditscomponents.AmorethoroughdiscussionofthebusinessprocessesthatdrovethedefinitionoftheseelementscanbefoundattheSubcommittee’swebsite2.ThisguidelineandmanyotherdocumentsrelatedtotheCadastralNSDIandtheCadastralSubcommitteecanbefoundathttp://www.nationalcad.org.
2 CadastralNSDIReferenceDocument,2007)http://www.nationalcad.org/showdocs.asp?docid=158&navsrc=Report&navsrc2=
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2. Business Applications ThegoaloftheFGDCCadastralDataSubcommitteeistoprovideauniformcoverageofparceldatathatprovidesamulti‐jurisdictionalvieworprivate,stateandfederallands,theirownership,use,structuresandthevalueofprivateproperty.Figure1showsanexampleofthecharacteristicsofasingleparcelandthetypeofinformationthatwouldbeavailableforanentireregion.GISanalysisofaregionaldatasetallowsuserstoidentifythelocationofpropertieswithspecificcharacteristicswithinaregion.Arecentstudyoftheutilityofparceldatabyemergencyrespondersafterahurricanefoundthatlocalparcelinformationwasuniquelycapableofansweringquestionsthatrangedfromtheidentificationofvacantlandsthatcouldbeusedfordebrisremovaltothelocationoforganicfarmstoavoidsprayingthemwithinsecticides.Asimilarstudyofwildlandfireswhereinterdictioncansavelifeandpropertiesfoundthatknowledgeofthelocationofstructuresandtheirvaluewascriticalintheplanninganddeploymentoflimitedresources.
Figure1‐AParcelwithinFEMAfloodzone.Anillustrationofhowparceldatawouldbeincorporatedintoabusinessapplication.Havingparcellevelofdetailwhenmakingdecisionsastowheretobestallocateresourcesisessential.Theissuethatmustbefacedishowtoensureallcommunitieshavethisdatainadigitalformatandthattheemergencymanagement(fire,hurricane,etc)communityhasaccesstoitwhentheyneedit.
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3. Terminology and Key Concepts
3.1CadastralDataandTheCadastralNSDICadastraldataistheinformationaboutrightsandinterestinland.Cadastraldatamayalsobeknownasrealestatedataorparcelinformationortaxparcelinformation.Therearemanylegalandhistoricalnuancesandsubtletiessurroundingthemanagementofcadastralinformation.3InpriordocumentsthepublicationofthecadastraldatawasoftenreferredtoastheCadastralNationalSpatialDataInfrastructure(NSDI)orCADNSDI. TheNSDIhasbeendefinedbytheFederalGeographicDataCommittee(FGDC).
ExecutiveOrder12906callsfortheestablishmentoftheNationalSpatialDataInfrastructuredefinedasthetechnologies,policies,andpeoplenecessarytopromotesharingofgeospatialdatathroughoutalllevelsofgovernment,theprivateandnon‐profitsectors,andtheacademiccommunity.ThegoalofthisInfrastructureistoreduceduplicationofeffortamongagencies,improvequalityandreducecostsrelatedtogeographicinformation,tomakegeographicdatamoreaccessibletothepublic,toincreasethebenefitsofusingavailabledata,andtoestablishkeypartnershipswithstates,counties,cities,tribalnations,academiaandtheprivatesectortoincreasedataavailability.TheNSDIhascometobeseenasthetechnology,policies,criteria,standardsandpeoplenecessarytopromotegeospatialdatasharingthroughoutalllevelsofgovernment,theprivateandnon‐profitsectors,andacademia.4
TheCADNSDIortheCadastralDataPublicationGuidelineisthecadastraldatacomponentoftheNSDI.TheCadastralNSDIattemptstosimplifysomeofcomplexitiesofcadastraldataintwoways,firstbyprovidingthecadastralinformationintwocomponents,cadastralreferenceandparcels,andsecondbyprovidingalimitedsetofparcellevelinformationtosupportidentifiedbusinessprocessneeds.Thismeansthatsomeofthemorecomplexlandtenurearrangementssuchascondominiums,fractionalinterestssimilartothosefoundinIndianCountryortimeshareownershipmaynotbefullyrepresentedinthelimitedpublicationdataset.ForProjectLevelrequestswheremoredetailisneededaboutaparticulararea,theauthoritativesourcecanprovidethesemorecomplexelements.sourceoftheCadastralNSDIdataisderivedfromthedatabasesofthedatastewards.
3CadastralNSDIReferenceDocument,(2007)page34http://www.fgdc.gov/nsdi/nsdi.html(lastaccessedSeptember1,2008)
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3.2Production,PublicationandProjectData
ProductionandPublicationDatawerefirstdefinedanddescribedbytheCadastralSubcommitteein2002.5ItwasmostrecentlydocumentedfortheInternationalAssociationofAssessmentOfficers(IAAO)andCadastralSubcommitteejointparcelneedsworkshopinNewOrleansinFebruary20086.Acommonmisunderstandingbetweenthesourcesofparceldataandtheusersofthedataarethedifferencesandrequirementsforproduction,publicationandprojectdata.TheCadastralSubcommitteehasdevelopedamoreextensivediscussionoftheseconcepts.
ProductionData:Localgovernment’sassessmentorproductiondatacontainsawealthofinformationthatisusedbyassessorstoconducttheirdailybusinessoperations.Thesearecomplicateddatabasesthatincludecompletedescriptionsoftaxableandassessmentattributesandananalysisoftheirvaluefortaxationpurposesthatmayormaynotincludetheparcelgeometryinageographicinformationsystem.LikewiseinStateagenciestherewillbeproductiondatatosupportthecollectionandmaintenanceofstateownedlands,businesslicenseandsalestaxdatathatincludespublicandnon‐publicinformation.
PublicationData:TheFGDCCadastralDataSubcommitteehasfoundthatasmallsubsetoftheproductiondata,knownaspublicationorcoredata,meetsover95%oftheusersneedsforplanningandemergencyresponse.Thiswasdeterminedfromaseriesofin‐depthworkshopsheldoverathree‐yearperiod.7
ProjectData:Moredetailedinformationforpropertiescanbeidentifiedthroughageographicselectionofanareaofinterestthatmaybeanoverlayofastormpath,awildlandfirepredictedpath,amortgagecrisishotspotoranyothereventfootprint.Parcelsofinterestintheaffectedareacanbeidentifiedfromthepublicationdataandmorecurrentanddetailedinformationonthissubsetofparcelscanberequestedfromthesource(s)toverifyownershipandotherinformationaboutaparcel.Thisisknownasprojectdataandwouldbeprovidedbytheauthoritativesourceafteraneventtoensurethatthemostcurrentdataisusedforposteventprocessing.
Figure2illustratesthesethreeconcepts.
5ProductionandPublicationAConceptforGeographicInformationEnvironments,(2002)6IAAOandFGDCCadastralSubcommitteeWorkshop:SharingParcelDatatoProtectandRebuildCommunities,(2008)7CadastralNSDIReferenceDocument,(2007)Summarizesthebusinesspracticeworkshops
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Figure2–Production,PublicationandProjectData
3.3DataStewards
Datastewardsaretheprovidersofcadastraldata.TheSubcommitteeestimatestherearenearly4,000primaryparcelproducersinfederalandstatelandmanagementagenciesandincountyagencieswherelocalgovernmenttaxassessmentofficesarethestewardsofcadastraldataforprivateproperties.Triballandsaremanagedbyindividualtribesandarenotconsideredpublicland.Adatastewardmayprovidecadastralreferenceinformationorparcelinformationorboth.Thecadastralpublicationdatawillhavedefineddatastewardsbasedongeographicextentandthedatacomponent.Forexampleinthefigurebelow(Figure3)thecadastralreferenceisshownasonelayerofinformationandtheparcelgeometrywithrelatedlandparcelinformationasanotherlayer.Thesetwocomponentsmayhavedifferentstewards,forexampleafederalagency,astateorganizationorasurveyingdepartmentinacountymaymaintainthecadastralreference.Thetaxassessororsomeothercountydepartmentmaymaintainthelandparcels.Inthiscasethegeometryisintegratedbecausetheparcelsaretiedtoanddependentonthecadastralreference,buttherearetwocadastraldatastewardsforthesamearea.However,datastewardsforagivendatacomponentdonotoverlap.Thatis,inanygivengeographicareatherewillonlybeonedatastewardforthecadastralreferenceandonedatastewardforthelandparcels.Thestewardshipboundariesandanychangesalongthoseboundarieswillneedtobeagreedtobythedatastewards.
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Figure3–Twocadastralcomponentsinthesamegeographicextent.
Adataintegratorcombinesinformationfromproducerstogenerateregionalorstatewideviews.Thedataintegratorswillpublishatleastthecoresetofinformationandprovidelinkagestomoredetailedsourceinformationfromthedataproducers.
3.4Organizations
AuthoritativeSourceisanentityauthorizedbyalegalauthoritytodevelopormanagedataforaspecificbusinesspurpose.Thedatathisentitycreatesareauthoritativedata.Thedatastewardsaretheauthoritativesourceandtheseareconsideredtheprimarysourceforcadastraldata.OneoftheprinciplesoftheCadastralPublicationGuidelinesisthattheauthoritativesourceapprovesandprovidesthepublicationdata.8TrustedSourceThisisaserviceprovideroragencythatpublishesdatafromanumberofauthoritativesources.Thesepublicationsareoftencompilationsandsubsetsofthedatafrommorethanoneauthoritativesource.Thesedataaretrustedbecausethereisanofficialprocessforcompilingthedatafromauthoritativesourcesandthelimitations,currency,andattributesareknownanddocumented.9CadastralReferenceisthesetofinformationthatallowsparcellevelinformationtoberegisteredtootherdatathemesandtobetiedtofeaturesontheground.Cadastralreferenceiscomposedofthespatialreferencedata(geodeticcontrolandorthophotography)andsurveyframeworkssuchasthePublicLandSurveySystem(PLSS),parcelmapgrids,subdivisionboundariesormunicipalboundaries.Landparcelsarenestedintoandtiedtothereferencedataandthecadastralreference.
8 FormoreinformationonthisseetheSubcommitteeReportofAuthoritativeandTrustedSourceshttp://www.nationalcad.org/showdocs.asp?docid=1045&navsrc=Report&navsrc2=9IBID
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One example of an eastern cadastral framework is in North Carolina where the cadastral reference is provided through the state. In this case the State has developed orthophotography standards to meet a wide range of uses, including cadastral information and other reference data such as county boundaries, municipal boundaries, subdivision boundaries and map grids. The parcels are tied to this framework.
3.5GeographicCoordinateDatabase
TheGeographicCoordinateDatabase(GCDB)isaprogramintheBureauofLandManagement(BLM)thatsupportsthemanagementofpubliclands,principallyinthewesternstatesbymanagingcoordinatevaluesonPublicLandSurveySystem(PLSS)cornersandspecialsurveyareas.IncontrasttotheeasttheGCDBisakeydatasourceforcadastralreferenceinthewest.TheGCDBoftenservesasthefoundationforstateandlocalparcelautomationeffortsaswellassupportfortheBLMandotherfederallandagenciessuchastheU.S.ForestServiceandtheParkService.OnfederallandsBLMCadastralSurveyisthedatastewardforthecadastraldataandinsomepartsofthewesttheyarealsothedatastewardsforthecadastralreferencebeyondfederalboundaries.Moreinformationabouttheseconcepts(datastewardship,GCDB,cadastraldataandongoingactivities)canbefoundathttp://www.nationalcad.org.
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4.TheCadastralPublicationDataComponents
TheNationalSpatialDataInfrastructure(NSDI)isdefinedbytheFederalGeographicDataCommittee(FGDC)10asthetechnologies,policiesandpeoplenecessarytopromotesharingofgeospatialdatathroughoutalllevelsofgovernment,theprivateandnon‐profitsectorsandtheacademiccommunity.Thecadastralpublicationdata(sometimesreferredtoastheCadastralNSDI)hasbeendefinedbytheFGDCCadastralSubcommitteeasaminimumsetofattributesaboutlandparcelsthatisusedforpublicationanddistributionofcadastralinformationbycadastraldataproducers.Thecadastralpublicationdataisintendedtoprovidesufficientinformationtosupportintegratingbasiclandparcelinformationacrossjurisdictionalboundariesprovidingaregionalviewofpropertyownershipandrights.Thisregionalviewisdesignedtoanswerfundamentalquestionsregardinglandownershipandpropertycharacteristics(structures,landuse,andparcelgeometry)insupportofenduserbusinesslandownershipinformation. Thepublicationdataisextracted(published)fromdataproducersatalllevelsofgovernment,butprimarilyfromlocalgovernments,federallandmanagementagencies,statelandmanagementagenciesorstatedepartmentsofrevenue.Thereareotherdataproducersthatcontributetothecadastraldataincludingcountylandsurveyprograms,privatesurveyors,Tribes,locallandmanagementagenciesandstateGISprograms.Thecadastralpublicationdataisstandardizedsoitcanbeintegratedacrossjurisdictionalboundaries,fromcounty‐to‐countyandfromstate‐to‐stateformingaseamless,non‐overlappingrepresentationoflandparcelsandcadastralreferencedata.Thecadastralpublicationdatahastwocomponents:CadastralReferenceandLandParcels.Supplementalinformationsuchasorthophotographyandgeodeticcontrolareessentialtobuildingandintegratingparcelgeometry.Thesupplementalinformationalsoprovidescontextforthecadastralinformationanddatabasessuchashydrography,transportationandevencontoursinsomecasesthatmaybeessentialforverticalintegrationofparcelmapping.Thestandardsforsupplementalinformationaredefinedbynon‐cadastralgroupsbutareessentialforestablishinganaccurategeographicreferencefortheCadastralNSDIsothatpublisheddatacanbeintegratedwithotherinformation.ThestandardsforthecadastralreferenceandparcelcomponentsaredefinedbytheCadastralSubcommitteeandareintheCadastralDataContentStandard11. Thecadastralreferenceelementsareneededtosupportquery,mappingandnavigationandarepartoflegaldescriptions.Thisincludesinformationaboutsurveysystems,such 10FederalGeographicDataCommittee,NationalSpatialDataInfrastructure,Internet,December2005,http://www.fgdc.gov/nsdi/nsdi.html11CadastralSubcommittee,FGDCCadastralDataContentStandardversion1.3,May2003,http://www.nationalcad.org/data/documents/CADSTAND.v.1.3.pdf
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assubdivisions,geopoliticalareas,landgrantsandthepubliclandsurveysystem.Figure4illustratesthecadastralreferenceconcepts
Figure4–CadastralNSDI–CadastralReference
Figure4illustratesthatthecadastralreferenceprovideslinkagestomoredetailedinformationwhilemeetingthebasicbusinessneedsformanyapplications.Landparcelsarethedetailedinformationaboutpropertyanditscharacteristicsthatareneededtomeetthebusinessneedsoftheusercommunity.Spatiallytheparcelsaretiedtotheearththroughthecadastralreferenceinformation.Figure5illustratesthelandparcelcomponent.
Figure5‐CadastralNSDI–ParcelInformationTheparcelinformationmaybepolygonsorparcelpoints.TheattributesintheparcelcomponentoftheCadastralNSDIcontainsufficientinformationtolinktotherichattributedatabasesfromthedataproducer.Onfederallymanagedpubliclandstheparcelsrepresenttransactionsordecisionssuchasgrazingleases,mineralsurveysoruseauthorizations.Onprivatelandstheparcelsaretypicallytaxparcelsbutmayincludeuserestrictionssuchaseasementsorrightsofways.MetadataisarequirementforallNSDIthemes.MetadataconformstotheFGDCMetadatastandardandshouldincludethecontactinformationinPart1oftheMetadatastandardasaminimum.TheCadastraldataContentStandardcanbecitedas
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thethesaurusandattributedefinitionsourceforcadastralpublicationdatasetsinthemetadata.Figure6illustrateshowthemetadataandtheidentificationoftheauthoritativeandtrustedsourcesarespatiallytiedtotheparcelandcadastralreferenceinformation.
Figure6–MetadataandDataStewards
4.1SampleImplementation
Figure7illustratestheopeningpageofademonstrationofthecadastralreferencedatafortheStateofArizona.ThedataonthissitewasgeneratedfromtheBLM’sPublicLandSurveySystemspatialdatasets(GCDB)forthestateasenhancedwithlocallygeneratedcontrol.ThelocalcontrolwasintegratedintotheGCDBhadheldfixedinadjustmentsandcomputations.
Figure7–StateofArizonaDemonstrationCadastralNSDISite
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Zoominginonaportionofthestate,theCadastralReferenceinformationbecomesvisibleandinFigure8thePLSSTownshipsandsectionsthatformthebasisofthecadastralreferencearevisible.
Figure8–CadastralReferenceInformationwithjurisdictionalanddatastewardshipinformationfromtheArizonaCadastralNSDI
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5.CharacteristicsoftheCadastralPublicationData
TheFGDCCadastralSubcommitteehasreviewedtheconceptdocumentsfortheNSDIandthecontentanddistributionofotherthemesaswellastheneedsandrequirementsfromthebusinessprocessesthatdrivetheneedforpublishedcadastraldata.Basedonthesefindingsthefollowingarethecommonandessentialcharacteristicsofpublishedcadastraldata.
Publishedcadastraldatawillhaveasinglesourceofauthoritativelandparceldataandasingleauthoritativesourceofcadastralreferencedatawithinasinglegeographicextent.Theupdatesandcontentofthisdatamustbecontrolledandmanagedbydesignateddatastewards(authoritativesources).Accesstothisdataisfacilitatedbycompilingandintegratingtheauthoritativedataintotrusteddatasourcesatstateorregionallevels.Thisreducesduplicationofeffortandassuresthatthebestavailableinformationisusedindecisionmaking.Attributesareasimportantasspatialinformationfordecisionsupport.Thelandparceldatamustbeupdatedatleastannually.Thepublishedcadastraldatamustbestandardizedsothatinformationcanbeintegratedacrossjurisdictionalboundaries.Thepublishedcadastraldatamustprovidelinkagestomoredetailedinformationthatcanbeobtainedfromdataproducers.
6.PoliciesfortheCadastralPublicationData
TheCadastralNSDIfollowsthegeneralpoliciesandguidelinesestablishedforallthemesintheNSDI.TheFGDCSubcommitteeforCadastralDataarticulatedthepoliciesthatwereneededfortheCadastralNSDIattheCadastralSubcommitteeOctober2003meetinginPortlandOregon12.
Goalistoestablishpoliciesthatleadtosharedcooperativedecisionmakingandprioritysetting.Whereas1. Cadastraldataiscollectedatthelocal(localized)level–published,
standardizedandintegratedatthestatelevelandindexedfornationwideaccessatnationallevel.
2. Manyfederallandagenciesandtribescollectlocalparcelinformation(i.e.localdoesn’tmeanjustlocalgovernments)
12 CadastralSubcommitteeMeetingNotes,(2003)
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3. Weneedtobeabletocompletea“mergeondemand”forcadastraldatawhichmeansdataareassembledfromproducersorintegratorswhenneeded,notstoredormanagedcentrally.
4. NorthCarolinafederalagencyandlocalcooperativegroups,MontanaMappingLiaisonOffice,andOregonfederalagency,regionalandlocalgovernmentcooperationareallgoodexamplesofhowlocalizeddatacollectioncanbecoordinated.
5. NGSStateAdvisorandtheUSGSMappingPartnershipOffice(MPO)programscanserveasmodelsforincreasingcommunicationandcooperationamongfederalagenciesandstateandlocalgovernments.Theseareexamplesoffederalagenciesdesignatingpointsofcontactfordatacollection,datadistribution,andrelatedtechnicalassistance.
6. Legacydataandnon‐automateddataimpedesourgoalandweneedtogetthisinformationautomatedandstandardizedtoachieveourgoal.
7. Werecognizetheimportanceof“thedatathreshold”tohelppeopleunderstandhowlocaldataandcadastraldatacanberelieduponforprograms.Thisisthethresholdofinformationyoumusthavetomakepeopleawareofthebenefits.
8. Weneedtocontinuetoidentifyexistingfederalprogramsthatcouldbenefitfromcooperationwithcadastraldatacollection.Forexample,manyfederalprogramsareverticallyfocusedanddon’trealizethepotentialforpartnerships.
9. Therichdatasourceofcadastralinformationatthelocallevelmeansthatsomestateandfederalagenciesthatformerlyneededtocollectdatacannowrelyondatafromthelocallevelratherthanengageinaseparatedatacollectioneffort.
Thereforeweneedto:
• Establishpolicytofirstuseappropriatelocalinformation,beforestartingnewcollectioninallgeospatialprograms.
• Establishpolicytocomplementlocalorlocalizeddataandnotcompletewithit–useemergencyresponseandplanningasexamplesofbenefitstoidentifycorevalues.
• Encouragebuildingthesepoliciesintoalldatacollectioncontractsandprojectsasacondition.
• EncourageFederalA‐16processestoachievecrossprogrambenefits.Thismeansencouragingfederalagenciestostepawayfromstovepipefundingprogramsandworkcooperativelyacrossagencies.
• Encouragedatacollectorsandintegratorstoexplorethebestinclassandotherexamplesandexistingstandardsbeforestrikingoutontheirownwithaprogramfordatacollection.Wetermedthisa“Lookupratherthanheadsdown”approach.
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AsaresultofthediscussionofthesepolicyneedsandtheresearchneededatthetimetofullydevelopacadastralcomponentfortheNSDItheSubcommitteeagreedtoandadoptedthefollowingpolicesforcadastraldatathatwouldbepublishedfortheNSDI.
DataPublication• Freelyavailable.*
DataStandardization• ReflectstheCadastralCoreDataStandard.• Provideslinkagestoadditionalsourceinformation.• Canbeintegratedacrossjurisdictionalboundaries.
DataDocumentation• Metadatadocumentationiscurrent.
DataIntegrity(qualityandcurrency)• Maintainedandkeptcurrentbythedataprovider**(atleastannually).• Dataisascompleteandaccurateasthedatastewardcanprovide.• Allowfor“mergeondemand”whichistheabilitytocombineinformationon
anasneededbasisfrommultiplesourcesacrossjurisdictionalboundaries.
*Indeferencetothe50Statesinitiativethepolicyrequiringthatthedatabefreelyavailablehasbeensubsequentlyupdatedtobefreelyavailableforgovernment–to‐governmentsharingtosupportdecisionmaking.Eachstatewillneedadoptanappropriatepolicyforthedatadistribution.**Thisconceptwasfurtherdevelopedtobetheauthoritativesourceasdescribedearlierinthisdocument.
7.BusinessProcessesandtheCadastralNSDI
TheCadastralSubcommittee’sstrategyfordeterminingtherequirementsforthecadastraldataistoassessthebusinessneedsofusercommunities.ThroughthisanalysisitwasdeterminedthatthepublishedcadastraldatahastwocomponentsCadastralReferenceandLandParcels.(SeeSection4ofthisdocument)Supplementalinformationwascriticaltocadastralmaintenanceandtoputthepublishedcadastralinformationincontext.Thecadastralcommunityisresponsibleforthetwocadastralcomponentsandisreliantontheactivitiesofothergroupsforthestandardsandstewardshipofthesupplementalinformation.Thecadastralreferenceistheinformationnecessarytofittheparcelinformationintoacontinuousfabric.Inthepublicdomainstates,thePubliclandSurveySystem(PLSS)isakeycomponentofthecadastralreference.Innon‐publicdomainstatesandinthePLSSstatesthereareothercadastralreferencesystemsthatformahierarchyforparcelinformationanddefineacadastralreference.Thisincludesmunicipalboundaries,hydrography(althoughthistreatedassupplementalinformation),mapgrids,subdivisionplatboundariesandblocksandlots.Thelandparceldatadescribethecharacteristicsofparcelsincludingthepolygonorcentroidandattributesthatdescribeownership,landuse,presenceofstructuresandtypeandvalue.
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8.CadastralPublicationGuideline–ImplementationTemplates
ThefollowingsectionsdescribetheCadastralNSDIwiththedetailsoftheattributesneededtosupportbusinessapplications.
8.1SupplementalInformation
TheSupplementalInformationincludesgeodeticandgeographiccontrolnecessarytoreferencecadastralinformationtoarealworldcoordinatesystem.EveryapplicationandbusinessprocessthatwasexaminedinthedevelopmentoftheCadastralNSDIimpliedorexplicitlystatedtheneedforthisunderlyingreference.SpatialreferencebeginswithageodeticnetworksystemthatcanbedensifiedwithaHighAccuracyReferenceNetwork(HARN)andfurtherextendedtobasemapsandorthophotography.Onekeypointisthatorthophotographyforcadastralinformationinmosturbanareamustbeatonefootpixelorsmallerresolutionwiththeassociatedverticalinformationtosupportthegenerationoftheorthophotography.Inareasofthecountrywithsevereterrainchangesormoreruralareasthedigitalorthoquarterquadranglestandardsmaybesufficient.
TheNationalGeodeticReferenceSystem(NGRS)ThisiscoordinatedandmanagedbytheNationalGeodeticSurveyandprovidesaconsistentanduniformdefinitionofcoordinatesystem,datumsandmonumentedpointsacrossajurisdiction.TheattributecontentoftheNGRSpointswillbeconsistentwiththestandardssupportedbytheNationalGeodeticSurvey.OrthophotographyandContoursThisisorthophotographythatistiedtotheNGRSandiscurrent.Ideally,theorthophotographyincludestheunderlyingterrainmodeltosupportthegenerationoftheorthophotographyandbasicterraininformationsuchasbreaklines.Theresolutionoforthophotographyrangesfromsixinchesintheurbanareastoasmuchas10metersinsteepslopedwildernessareas.Hydrography–Forthepurposesofcadastralreferencehydrographyisincludedtotheextentneededtosupportthedefinitionofcadastralfeatures.Thesearegenerallymeanderablewaterbodiesorwaterthatmayformtheextentofriparianboundaries.InCoastalareasthismayincludetidallimitdefinitionsaspossible.RoadsManyparcellegaldescriptioncallfortheedgeofroadsortheedgeofrightofrightofways.ThestandardsforroadrightofwayareapartoftheCadastralSubcommittee’smissionsbuttheroadsurfaceortraveledwayisnot.Inparticularthetransportationorroadinformationisoftennecessarytosupportandprovideintegritytoparceladdressinformation.
8.2CadastralNSDI–CadastralReference
TheCadastralNSDICadastralReferencecomponentshavebeendefinedintheFGDCCadastralNationalSpatialDataInfrastructure(NSDI)Standardastheelementsneededtosupportquery,mappingandnavigation.CadastralReferenceitemsareapartoflegaldescriptionsandarecontainedintheCadastralDataContentStandard.
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CadastralReference‐Thisistheinformationnecessarytofittheparcelinformationintoacontinuousandrelatedfabric.Inthepublicdomainstates,thePubliclandSurveySystem(PLSS)isakeycomponentofthecadastralreference.Innon‐publicdomainstatesandinthePLSSstatesthereareothercadastralreferencesystemsthatformahierarchyforparcelinformationanddefineacadastralreference.Thisincludesmunicipalboundaries,mapgrids,subdivisionplatboundariesandblocksandlots.
AmoredetaileddescriptionoftheelementsoftheCadastralNSDICadastralReferenceisasfollows.
Metadata‐Themetadatawillcontaininformationabouttheentiredatasetsuchthejurisdictionname,thejurisdictioncontact,adescriptionofcoordinatesystems,unitsofmeasure,horizontalandverticaldatumifthisinformationisthesameforallcoordinatesreportedinthedataset.Iftherearevaryingreferencesystemsprovidedinthedatasetthentheseitemsarecapturedatthefeaturelevel.Othermetadataincludesthedateofthefilecodeddomainofvaluesandaccuracyreports.
CornersofCommonUsage–Thesearecornersorreferencepointsthatareusedextensivelybylandsurveyorsandotherstogeneratelegaldescriptionsandsurveys.Thesemightbepointsofcommencing,cornerscommontoseverallanddivisions,orcornersofthePublicLandSurveySystem.Theremayberoadintersections,controlmonumentsorcornersofmunicipalboundariesthatareusedcommonlyasastartingpointforlanddescriptions.Eachjurisdictionthatcollectsandmaintainscadastralinformation(cadastralstewards)willidentifywhattheywouldconsidertobeCornersofCommonUsage.Generallythesecornerswouldbeatonetotwomilespacinginruralareasandblock‐by‐blocktoonehalfmiletospacinginurbanareas.CornersofCommonUsagearealsooftenusedinotherthemestocontrolthosethemessuchaspoliticalboundaries.
Thesuggestedattributesforthecornersofcommonusageareasfollows.
ControlID‐Primarykeyforthecornerofcommonusagethattheproviderassignstothepoint.Thismaybeanameoranumber,suchastheNationalGeodeticSurvey’spointidentifier(PID)ortheBureauofLandManagement’sGCDBstandardcorneridentifier.XCoordinate‐Thisistheeasting,theXcoordinateorthelongitudeofthecornerofcommonusagereportedasanattribute.YCoordinate‐Thisisnorthing,theYcoordinateorthelatitudeofthecornerofcommonusagereportedasanattribute.ZCoordinate–Thisistheheightorelevationofthecornerofcommonusage.CoordinateSurveyor‐Thesurveyorwhoestablishedthecoordinatepositions,whichmaybedifferentthanthemonumentsurveyor.Thismayalsobeanagencyorfirm.CoordinateDate‐Thedateofthecoordinatevalues.CoordinateSystem‐Thecoordinatesystemforthecoordinatevaluesuchaslatitudelongitude,stateplanecoordinateorUTM.Thisshouldincludetheunitsofmeasure.Thisisonlyneededifthecoordinatesystemforthecornerofcommonusagevaries
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fromthatdescribedinthemetadata.ElevationUnits‐Theunitsofmeasureforthereportedelevation.Thisisonlyneedediftheelevationunitforthecornerofcommonusagevariesfromthatdescribedinthemetadata.HorizontalDatum‐Thehorizontaldatumforthereportedcoordinatevalue.Thisisonlyneededifthehorizontaldatumforthecornerrecordvariesfromthatdescribedinthemetadata.ElevationDatum‐Theverticaldatumisthereferencedatumforthereportedelevationvalue.Thisisonlyneedediftheelevationdatumforthecornerofcommonusagevariesfromthatdescribedinthemetadata.HorizontalAccuracy‐Theaccuracyorreliabilityforthereportedhorizontalcoordinatepositionforthecornerofcommonusage.ElevationAccuracy‐Theaccuracyorreliabilityforthereportedelevationforthecornerofcommonusage.MethodsandProcedures–anindicationonthecollectionmethodsorproceduressuchasdigitizedorGPS.
GridorCellReferenceSystem–Thisisareferencesystemthatisusedtosupportparcelmappingandmaybearegulargridcelloranirregularsetofpolygons.Gridorcellreferencesystemsaremostcommonlyfoundinnon‐publicdomainareasandareoftenusedtosupporttaxmappingortheassignmentoftaxparcelidentifiers.Asexamples,theStatePlaneCoordinateSystemoralandlotgridcellsystemorataxmapsheetsystemmaybeusedtodefineasetofgridsorcells.InthepublicdomainstatesthedivisionsofthePublicLandSurveySystem(township,sectionandsectiondivisions)typicallyformthegridorcellreferencesystemformappingandbecalledanominaldivisionsincetheuseofthePLSSinthismanneristoprovideanindexratherthantosupportlegaldescriptions.Thegridorcellreferencesystemdescriptionshouldbeincludedinthemetadata.SignificantCadastralReferenceFeatures–Theseareareasandfeaturesthatdefineorareusedtoreferencelegaldescriptions.AsexamplesthismightbethePublicLandSurveySystemcomponents,theexteriorboundariesofsubdivisionsortheboundariesoflargepubliclandholdings.Typicallythesearefeaturesthatareimportantforunderstandingandusingparcelinformation.Someexamplesareasfollows.
SurveySystemArea–Asurveysystemareaisgenerallyasimultaneousconveyancethatdefinesanareaoflandwithinwhichthereisaconsistentmethodoflanddescription.Themostcommonlyknownexampleisasubdivisionoracondominium.Surveysystemareastypicallyhaveanameornumber.PublicLandSurveySystemTownship‐InthePublicLandSurveySystemaTownshipreferstoaunitofland,thatarenominallysixmilesonaside,usuallycontaining36sections.PublicLandSurveySystemTownshipFirstDivision‐PublicLandSurveySystemTownshipsfirstdivisionsarenormallysectionsortracts.Buttherecanbeexceptions.
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SurveyName‐PublicLandsurveyareasinOhioareidentifiedbyaname.ThenamedareashaveanoriginofPublicLandSurveySystemvalueandthenarefurtheridentifiedbySurveyName.ThesewouldbeareasinOhioonly.
SecondarySurveyName‐SecondarySurveyNamefurtheridentifiesnamedareaswithintheOhiosurveys.ThesewouldbeareasinOhioonly.
8.3CadastralNSDICoreDataforParcels
TheattributesfortheCadastralNSDIParcelshavebeendevelopedthroughaseriesofstudiesofbusinessprocesseswiththeparcellevelinformationbeingthedetailedinformationneededbythosebusinessprocesses.TheelementsintheCadastralNSDIParcelaredefinedintheCadastralDataContentStandard.
Thebusinessprocessesthathavebeenexaminedtoidentifytheparcelelementstodateincludenavigationanddiscoveryofparcelinformation,emergencyplanning,emergencyresponse,recovery,mitigation,economicdevelopmentandregionalintegrationandcommunityplanning.Allofthesebusinessprocessesindicatedaneedfindadditionaldetailaboutparcelsthroughlinkagestodataproducers.TheCadastralNSDIParcelalsoknownastheParcelCoreDatahasbeendevelopedtosupportinitialorfirstpassneedsofthesebusinessprocesses.Insomecasesthisisallthedatathesebusinessneedshaveandinothersthisdataidentifieswhichparcelswillneedtohavemoredetailedinformationtosupportcasebycaseprocessing.
AmoredetaileddescriptionoftheelementsoftheCadastralNSDIParcelisasfollows.
Metadata‐Themetadatawillcontaininformationabouttheentiredatasetsuchasthedatasteward,theparcelcontact,adescriptionofthebasisfortheassessmentsystem(saleprice,use,marketvalueetc),thedateofthefile,informationoninterpretationoftheassessmentclassificationsandanyothermetadatathatwouldsupporttheuseandapplicationoftheinformation. ParcelOutline(Polygon)‐Thisisgeographicextentoftheparcel,theparcelboundariesformingaclosedpolygon.Theparcelgeometrymaybeapolygonorapoint.TheParcelcentroidandthepolygonarenotbothrequired.ParcelCentroid(Point)‐Thisisapointwithintheparcelthatcanbeusedtoattachrelatedinformation.Thismaybeavisualcentroidorapointwithintheparcel.Itmaynotbethemathematicalcentroidasthispointneedstobecontainedwithintheparcelpolygon.ParcelID‐Auniqueidentifierfortheparcelasdefinedbythedatastewardordataproducer.Theparcelidentifiershouldprovidealinktoadditionalinformationabouttheparcelandshouldbeuniqueacrossthedatasteward’sgeographicextent.SourceReference–ThisfieldisoftencalledtheVolume/PageorLiber/Pageinlocalrecords.Thisisapointerto,oranattributedescribing,thesourcereferencefortheparcel.Thiscouldbeadeed,plat,orotherdocumentreference.SourceReferenceDate‐ThedateoftheSourceReference,whichisessentiallythelastupdatedateforthisparcel.Theentiredatasetmayhavealastupdateddateoran“unloadedfor
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publication”datethatisdifferentthanthespecificcurrencyorupdatedateforeachindividualparcel.OwnerType‐Thetypeofownershipistheclassificationofowner.Insomelocalgovernmentstaxparcelsaretaggedaseithertaxableorexemptandtheownerclassificationisnotknown.Improved‐Thisisanattributetoindicatewhetherornotthereisanimprovementontheparcel.OwnerName‐Anindicationoftheprimaryownername,recognizingthattheremaybemultipleownernamesorthatsomeownernamesmaybeblockedforsecurityreasonsorthatsomejurisdictionsmaynotallowthedistributionofownernames.Forpubliclyheldlandstheownernameisthesurfacemanagingagency,suchaBureauofLandManagement,DepartmentofTransportation,etcAssessment/ValueforLandInformation‐Thisisthetotalvalueofthelandonly.Thebasisofthevalue,suchasmarketvalue,resalevalue,salepriceorusevalueshouldbedescribedinthemetadata.Assessment/ValueforImprovementsInformation‐Thisisthetotalvalueofimprovementsontheparcel.Thebasisofthevalue,suchasmarketvalue,resalevalue,salepriceorusevalueshouldbedescribedinthemetadata.Assessment/ValueTotal‐Thisinformationisthetotalvalueofthelandandimprovements.Thebasisofthevalue,suchasmarketvalue,resalevalue,salepriceorusevalueshouldbedescribedinthemetadata.BasisoftheValues–Anindicationofthetypeofvaluesthatareprovided(taxable,market,assessedorother)AssessmentParcelUseCode‐Thisistheparceluseclassificationforthetaxparcel.TaxBillMailingAddress‐ThisistheUSPostalServiceaddressforthetaxbillmailing.SiteAddress–Thisisthestreetaddress(siteaddress)fortheparcel.Ifthereismorethanone,selectthefirstorprimarysiteaddress.ParcelArea‐Theareaoftheparcelexpressedinacres.
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AppendixA–DatabaseImplementationTemplateDetails ThefollowingdocumentationisatemplateforimplementationusingtheformatESRI’sgeodatabase.Inthelistoftheattributesthereare:
fieldnamewhichisshortenedtoaccommodate8.3standardwhichis11charactersinlength.fieldtypewhichistextorstring,integer(anumberwithoutadecimalplace,ordouble,anumberwithadecimalplace).Insomecasestheearefieldsthatarenumbersbuttheyarelistedasatextattributetype.Thisistopreserveleadingzeros.Lengthwhichistheexpectedlengthbutthisistypicallyaminimum.FieldlengthsmaybelongerAliasnamewhichisalongerandmoreeasilyunderstandnameforthefieldDescriptionwhichisashortdefinitionoftheattribute
AttributenamesinREDareconsideredessential,orbareminimum.Thesearetheattributesthatareexpectedinalldatasets.Howeverevenwithintheessentialorbareminimumitisrecognizedthatifthedatadoesnotexistthejurisdictioncannotprovideit.Theessentialattributesshouldbeprovidedifpossible.Thelessessentialattributeshavebeenidentifiedasneededforanapplicationbutarenotcommontoallthebusinessneeds.Ifatableorfeatureclasshasnoredmarkedattributesthefeatureisnotpartoftheessentialdataset.Therearethreetypesoffeaturesordatatableelementslisted.Afeaturedatasetisacollectionofrelatedfeatureclassesthatshareacommoncoordinatesystem.Featuredatasetsareusedtospatiallyorthematicallyintegraterelatedfeatureclasses.Theirprimarypurposeisfororganizingrelatedfeatureclassesintoacommondatasetforbuildingatopology,anetworkdataset,aterraindataset,orageometricnetwork.Afeatureclassisadatabasetableaboutageospatialfeature.Inthecaseoftheparcelinformationthefeaturesmaybepointsorpolygons.Atableisanattributelisting.Thetablesinthislistarealllookuptablesthatareprovidedfortheconvenienceofdatamigrationformlocalsystemstothestandards.Becausethisisapublicationdatasetandeditingshouldnotbeoccurringagainstthedataset,therearenodomainsofvalues.
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GeodatabaseDocumentation
FeatureDatasets
CadastralReference‐FeatureDatasetMeanderedWater‐SimpleMetadataGlance‐SimplePLSSFirstDivision‐SimplePLSSIntersected‐SimplePLSSPoint‐SimplePLSSQuarterReference‐SimplePLSSReferenceGrid‐SimplePLSSSecondDivision‐SimplePLSSSpecialSurvey‐SimplePLSSTownship‐SimpleSurveySystem‐Simple
Parcels‐FeatureDatasetNSDICoreParcel‐Simple
TablesandFeatureClasses
LU_Direction‐TableLU_OwnerType‐TableLU_ParcelValueType‐TableLU_PLSSFirstDiv‐TableLU_PLSSSecDiv‐TableLU_PrincipalMeridian‐TableLU_State‐TableLU_SurSysDivision‐TableLU_SurveyNameOhio‐TableLU_SurveySystem‐TableLU_SurveyType‐Table
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CadastralReference‐FeatureDataset
Name CadastralReference
Description Thesearethecadastralreferencefeaturesthatprovidethebasisandframeworkforparcelmapping.
DataThemecadastral
MeanderedWater‐FeatureClass
Name MeanderedWater
ShapeType Polygon
FeatureTypeSimple
AliasName MeanderedWater
Description TheseareareasofwaterthataredefinedfrommeanderlinesofthePLSSandGLOsurveys.Thesearenottheofficialrepresentationsofcoastorwaterlinesandarerepresentationsofthelinesmarkedbythesurveyalongtheboundariesofmeanderedwateratthetimeofsurvey
Purpose Toprovidethepolygonsoftheoriginallymeanderedwaterareas
DataThemeCadastral
Field DataType Length AliasName Description
SURVTYP String 2 SurveyTypeCodeforMeanderedWater
Surveytypecode.ThesearethesurveytypesfromtheBLMGCDBandforthisdatasettheseshouldbeWforWater
SURVTYPTXT String 50 SurveyTypeDescription
Thesurveytypeasatextstring
MetadataGlance‐FeatureClass
Name MetadataGlance
ShapeType Polygon
FeatureTypeSimple
AliasName MetadataGlance
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Description ThisisagraphicrepresentationofthedatastewardsforthePLSSData.TheminimumresolutionofthePLSSDataStewardistheTownship.Forwesternstatestheidentificationofthedatastewardsatthetownshiplevelisageneralindicationoftheagencythatwillberesponsibleforupdateswithinthetownship.Inotherimplementationsthismayhavebeentermedthealternativesource,meaningalternativetotheBLM.ButinthesharedenvironmentoftheNSDIthestewardforanareaistheprimarycoordinatororagencyresponsibleformakingupdatesorcausingupdatestobemade.OvertimeitisexpectedthatthedatastewardswillbemorefinelydescribedthanattheTownshiplevel.
Purpose Toprovideavisualreferenceforthemetadataaboutstewardsandrevisiondates
DataTheme Cadastral
Field DataType Length AliasName Description
PLSSID String 16 PLSSIdentifier Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueid.
TWNSHPLAB String 25 LabelforPLSSTownship
Townshiplabelthatisusedforcartographicoutputorwebdisplay.
STEWARD String 50 DataSteward Datastewardforthetownship.
REVISEDDATE Date 8 LastRevisedDate
ThelastdateofanyrevisionintheTownship
PLSSFirstDivision‐FeatureClass
Name PLSSFirstDivision
ShapeType Polygon
FeatureTypeSimple
AliasName PLSSFirstDivision
Description ThePLSSFirstDivisioniscommonlythesection.ThisisthefirstsetofdivisionsforaPLSSTownship.
Purpose toprovidethepolygonsforthefirstdivisionsofthePLSSTownship
DataThemeCadastral
Field DataType Length AliasName Description
FRSTDIVID String 22 FirstDivision Thisisauniqueidentifierforthefirst
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Identifier divisionthatisbuiltbyappendingthefirstdivisionelementsontheTownshipidentifier.
FRSTDIVNO String 3 FirstDivisionNumber
Thisisthenumber,letterordesignatorforthefirstdivisionofthePLSSTownship
FRSTDIVDUP String 1 FirstDivisionDuplicate
Thisisacodetoindicatewhetherthefirstdivisionisaduplicatedareaoridentifier
FRSTDIVTYP String 2 FirstDivisionTypeCode
Thisisthetypeoffirstdivisionandiscommonlythesectionbutmaybealot,parcel,tractorotherdivision.
FRSTDIVTXT String 50 FirstDivisionTypeDescription
Thisisthefirstdivisiontypeasatextfield
PLSSID String 16 PLSSIdentifier ThisistheuniqueidentifierforthePLSSTownshipinwhichthefirstdivisionislocated.Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueidentifierforthetownship.
FRSTDIVLAB String 5 FirstDivisionLabel
Thisisthelabelforthefirstdivisionthatisusedforcartographicofwebdisplaypurposes.
SURVTYP String 2 SurveyTypeCode
Codeofthetypeofsurvey.Thisindicatesifthetownshipfirstdivisionhasbeensurveyed,protractedorunprotracted(extended)
SURVTYPTXT String 50 SurveyTypeText
Surveytypetextdescription.
PLSSIntersected‐FeatureClass
Name PLSSIntersected
ShapeType Polygon
FeatureTypeSimple
AliasName PLSSIntersected
Description ThefullyintersectdataistheatomiclevelofthePLSSthatissimilartothecoverageorthesmallestpiecesusedtobuildthePLSS.Polygonsmayoverlapinthisfeatureclass.
Purpose Thefullyintersectedpolygonsareusedforconversionandformaintenance.ThiscontainstheatomicandfullyattributedcomponentsoftheotherPLSSfeatures.
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ThisisausefuldatasetformaintenanceandmaybeneededbyconsumerswhorelyontheNSDIdataforproduction.
DataThemeCadastral
Field DataType Length AliasName Description
STATEABBR String 2 StateAbbreviation
Stateabbreviationcodetwoletterpostalcode
PRINMERCD String 2 PrimeMeridianCode
PrincipalmeridiancodefromtheBLMPMCodelist
PRINMER String 40 PrimerMeridianDiscussion
Principalmeridiannameasatext
TWNSHPNO String 3 PLSSTownshipNumber
Townshipnumber.TheTownshipNumberindicatesthenumberofrowsoftownships,northorsouthfromaPublicLandSurveySystemOrigin.
TWNSHPFRAC String 1 PLSSTownshipFraction
Townshipfraction.TownshipFractionsarecreatedwhentherearegapsbetweensurveyedTownshipboundariesorduetoexcesssizeinTownshipsthatarosefromexecutingoriginalsurveys.
TWNSHPDIR String 1 PLSSTownshipDirection
Townshipdirection.ThedirectionofarowofTownshipsfromaPublicLandSurveySystemOrigin.ThesearetypicallyNorthandSouthintheWestbutmaybeEastandWestinOhio
RANGENO String 3 PLSSRangeNumber
Rangenumber.TheRangeNumberindicatesthenumberofcolumnsoftownships,eastorwestfromaPublicLandSurveySystemOrigin.
RANGEFRAC String 1 PLSSRangeFraction
Rangefraction.RangeFractionsarecreatedwhentherearegapsbetweensurveyedTownshipboundariesorduetoexcesssizeinTownshipsthatarosefromexecutingoriginalsurveys.
RANGEDIR String 1 PLSSRangeDirection
Rangedirection.ThedirectionofacolumnoftownshipsfromaPublicLandSurveySystemOrigin.ThesearetypicallyEastorWestinthewestbutmaybenorthorsouthinOhio
TWNSHPDPCD String 1 PLSSTownshipDuplicate
IftherearemultipletownshipsinaPublicLandSurveySystemOrigin,Stateand
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SurveyName,theTownshipDuplicateStatusisusedtoestablishuniqueness.WhenmorethanonePublicLandSurveySystemTownshiphasthesameTownshipandRangenumbersanddirectionsandfractions,andareinthesameState,thisattributeisusedtodistinguishamongduplicatevalues.
PLSSID String 16 PLSSIdentifier Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueid.
STEWARD String 50 PLSSDataSteward
Datastewardforaparticulartownship.
TWNSHPLAB String 20 PLSSTownshipLabel
Townshiplabelthatisusedforcartographicoutputorwebdisplay
FRSTDIVID String 22 PLSSFirstDivisionIdentifier
ThisisauniqueidentifierforthefirstdivisionthatisbuiltbyappendingthefirstdivisionelementsontheTownshipidentifier.
FRSTDIVNO String 3 PLSSFirstDivisionNumber
Thisisthenumber,letterordesignatorforthefirstdivisionofthePLSSTownship
FRSTDIVDUP String 1 PLSSFirstDivisionDuplicate
Thisisacodetoindicatewhetherthefirstdivisionisaduplicatedareaoridentifier
FRSTDIVTYP String 2 PLSSFirstDivisionTypeCode
Thisisthetypeoffirstdivisionandiscommonlythesectionbutmaybealot,parcel,tractorotherdivision.
FRSTDIVTXT String 50 PLSSFirstDivisionTypeText
Thisisthefirstdivisiontypeasatextfield
FRSTDIVLAB String 5 PLSSFirstDivisionTypeLabel
Thisisthelabelforthefirstdivisionthatisusedforcartographicofwebdisplaypurposes.
SECDIVID String 25 PLSSSecondDivisionIdentifier
Uniqueidentifierfortheseconddivision.
SECDIVNO String 50 PLSSSecondDivisionNumber
Seconddivisionnumberoraliquotpartreference.
SECDIVSUF String 10 PLSSSecondDivisionSuffix
Seconddivisionsuffix.
SECDIVTYP String 1 PLSSSecondDivisionType
Codeofthetypeofseconddivision.
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SECDIVNOTE String 50 PLSSSecondDivisionNote
Codeforthesurveynoteoftheseconddivision
SECDIVTEXT String 50 PLSSSecondDivisionTypeText
Seconddivisiontypetextdescription
SECDIVLAB String 50 PLSSSecondDivisionLabel
PLSSSecondDivisionlabelforcartographicoutputorwebdisplay.
SURVTYP String 1 PLSSSpecialSurveyTypeCode
Codeofthetypeofspecialsurvey.
SURVTYPTEXT String 50 PLSSSpecialSurveyTypeText
Specialsurveytypetextdescription.
SURVNO String 10 PLSSSpecialSurveyNumber
Specialsurveynumber.
SURVSUF String 5 PLSSSpecialSurveySuffix
Specialsurveysuffixdesignationthatmakestheidentificationoftheareaunique.
SURVNOTE String 50 PLSSSpecialSurveyTypeNote
Notesaboutthepolygonfeaturethatareimportantforusingorunderstandingthefeature.FromtheBLMSurvNotesareA=ApproximateAcreage,C=ConflictorQuestionable,D=Non‐addedAcreage
SURVLAB String 50 PLSSSpecialSurveyNote
Labelthatisusedforcartographicoutputorwebdisplay.
ACRES Double 8 PLSSSpecialSurveyAreainAcres
Areaoftheseconddivisioninofficialacres.
QSEC String 4 QuarterSection
Quartersectionreference
GOVLOT String 4 GovernmentLotNumber
ThesearetheGovernmentLots
QQSEC String 4 QuarterQuarterSection
ThisisthequarterquarterPLSSreference
PLSSPoint‐FeatureClass
Name PLSSPoint
ShapeType Point
FeatureTypeSimple
AliasName PLSSPoint
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Description ThesearethecornersofthePLSS.Thisdatasetcontainssummaryinformationaboutthecoordinatelocationandreliabilityofcornercoordinateinformation.
Purpose ToprovidetheessentialobservedcoordinateinformationforPLSScorners.Thisisnotthecompletedatasetforcorners.Thesearethemostcurrentcoordinates.TheNationalPLSSpointidentifierdocumentationisprovidedinAppendixB.
DataThemeCadastral
Field DataType Length AliasName Description
POINTLAB String 6 CornerPointLabel
PLSSPointlabelforcartographicoutputorwebdisplay.
POINTID String 24 CornerPointIdentifier
Uniquepointidentifierforthecornerthatfollowsthenationalpointidentificationstandard
PLSSID String 16 PLSSAreaIdentification
Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueidentifierforthetownship.Ifacornerisinmultipletownships,onaborder,thisisthePLSSIDforthelowestGCDBnumber.
XCOORD Double 8 XorEastCoordinate
X,longitudeoreastcoordinatevalueforthecorner.
YCOORD Double 8 YorNorthCoordinate
Y,latitudeornorthcoordinatevalueforthecorner
ZCOORD Double 8 ZorHeightCoordinate
Z,Height,ObservedElevationforthecorner
ELEV Double 8 AverageTownshipElevation
ThisisanaverageelevationfortheentirePLSSTownship
ERRORX SmallInteger 2 ErrorinX TheerrorintheXdirection
ERRORY SmallInteger 2 ErrorinY Theerrorintheydirection
ERRORZ SmallInteger 2 ErrorinZ TheerrorintheZdirection
HDATUM String 20 HorizontalDatum
thehorizontaldatumforthecoordinatevalue,thisisthedatumthereportedcoordinatevalueisreportedinandmaybedifferentthantheGIShorizontaldatum
VDATUM String 20 VerticalDatum
TheverticaldatumforanobservedZorheight
STEWARD1 String 50 Stewardfor theprimarydatastewardfortheplss
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thePLSSPoint
point
STEWARD2 String 50 SecondStewardforPLSSPoint
theseconddatastewardforthePLSSpointifthereisasecondsteward,suchasonacountyboundaryorafederalownershipboundary
LOCAL1 String 25 FirstPLSSPointAlternateName
thefirstaliasforthecontrolpoint,mostcommononPLSSTownshipboundaries
LOCAL2 String 25 SecondPLSSPointAlternateName
thesecondlocalidentifieroralias.MostcommononcornersonPLSStownshipboundaries
LOCAL3 String 25 ThirdPLSSPointAlternateName
thethirdaliasforthecontrolpointmostcommononPLSSTownshipboundaries
LOCAL4 String 25 FourthPLSSPointAlternateName
thefourthaliasforthecontrolpointmostcommonwhenaPLSScorneriscommontoaspecialsurvey
RELY String 15 PLSSPointReliability
Thereliabilityoraccuracyofcoordinatevalueasasingleentry,maybeacodedvalue
COORDPROC String 20 CoordinateComputationProcedure
Thecoordinatecomputationprocedurewhichtypicallyreflectstheadjustmentmethodorastandardfollowedtocomputethecoordinatefromthefieldobservation
COORDSYS String 20 CoordinateSystem
thecoordinatesystemforthecoordinatevalue,thismaybedifferentthantheGIScoordinatesystemifthereportedx,yvaluesaredifferentthantheGIScoordinatesystem.
COORDMETH String 25 CoordinateCollectionMethod
themethodofobservationormeasurementforthecoordinatevalue.ThistypicallyindicatesatechnologysuchasGPS,digitized,lineofsight
REVISEDDATE Date 8 LastRevisedDate
ThelastrevisiondateforthecoordinatevalueforthePLSSCorner
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PLSSQuarterReference‐FeatureClass
Name PLSSQuarterReference
ShapeType Polygon
FeatureTypeSimple
AliasName PLSSFirstDivision
Description ThePLSSQuarterSectionReferenceisacompanionfeatureclassforthePLSSReferenceGridthatprovidesaquartersectiondivisionofthesectionsforreferenceonly.
Purpose Thisisamappedreferencegridusedtosupportsomewebandrapidqueryapplications
DataThemeCadastral
Field DataType Length AliasName Description
PLSSID String 16 PLSSIdentifier ThisistheuniqueidentifierforthePLSSTownshipinwhichthefirstdivisionislocated.Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueidentifierforthetownship.
REFGRIDNO String 20 ReferenceGridNumber
Thenumberforthereferencegrid.SomejurisdictionsassignaletterornumberdivisionsofthePLSS
REFGRIDNOM String 4 ReferenceGridNominalLocation
Thenominallocationofthereferencegridcellorfeature
REFGRIDDUP String 2 ReferencegridDuplication
Aduplicatecodetoindicateifthecellorfeatureofthereferencegridisaduplicate
QSECTION String 16 QuarterSection
thequartersectionlabel
REFSOURCE String 16 SourceReference
ThereferencetothesourcedocumentcouldbeareferencetoamaporplatoradatasetsuchasGCDB
SURVTYP String 2 SurveyTypeCode
Codeofthetypeofsurvey.Thisindicatesifthetownshipquarterreferencehasbeensurveyed,protractedorunprotracted(extended)
SURVTYPTXT String 50 SurveyTypeText
Surveytypetextdescription.
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PLSSReferenceGrid - FeatureClass
Name PLSSReferenceGrid
ShapeType Polygon
FeatureType Simple
AliasName PLSSReferenceGrid
Description ThereferenceGridisageneralizeddatasetprovidingtheTownshipandFirstDivisionsofthePLSSasaseparatefeatureclasstosupportdatarequests,mappingandindexing.Thespatiallocationandpositionandattributesofthisfeatureclassarethesameasthoseintheprimarydatasetsfromwhichthisdataisbuilt.Thesedataareoftenusedformapsheetlayoutsandgenerallocationreference
Purpose Thisfeatureclasssupportsindexingandrapidreferenceandquerygenerallyforwebapplicationsaswellasmapbookandmapsheetlayouts
DataThemeCadastral
Field DataType Length AliasName Description
PLSSID String 16 PLSSIdentifier Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueid.
REFGRIDNO String 20 ReferenceGridNumber
Number,letterordesignatorforthefirstdivisionofthePLSSTownship.
REFGRIDNOM String 4 ReferenceGridNominalLocation
Number,letterordesignatorforthenominalfirstdivisionofthePLSSTownship.
REFGRIDDUP String 2 ReferenceGridDuplicateIndicator
Codetoindicatewhetherthefirstdivisionisaduplicated.
EXPIRDATE String 16 ExpirationDate Expirationdateforthedataset.Thisisthedatethedatasetisexpectedtobeupdated.
SOURCEREF String 25 ReferencetoSourceorSteward
ThereferencetothesourcedocumentcouldbeareferencetoamaporplatoradatasetsuchasGCDB
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PLSSSecondDivision‐FeatureClass
Name PLSSSecondDivision
ShapeType Polygon
FeatureTypeSimple
AliasName PLSSSecondDivision
Description TheseconddivisionofthePLSSisquarter,quarter‐quarter,sixteenthorgovernmentlotdivisionofthePLSS.Thesecondandthirddivisionsarecombinedintothisfeatureclassasanintentionalde‐normalizationofthePLSShierarchicaldata.Thepolygonsinthisfeatureclassrepresentthesmallestdivisiontothesixteenththathasbeendefinedforthefirstdivision.ForexampleInsomecasessectionshaveonlybeendividedtothequarter.DivisionsbelowthesixteenthareintheSpecialSurveyorParcelFeatureClass.
Purpose ThisfeatureclassprovidesthegraphicofthealiquotorgovernmentlotdivisionsofthePLSStownship
DataThemeCadastral
Field DataType Length AliasName Description
SECDIVID String 25 SecondDivisionIdentifier
Uniqueidentifierfortheseconddivision.
FRSTDIVID String 25 FirstDivisionIdentifier
Uniqueidentifierforthefirstdivision.
SECDIVNO String 50 SecondDivisionNumberorDesignator
Seconddivisionnumberoraliquotpartreference.
SECDIVSUF String 10 SecondDivisionSuffix
Seconddivisionsuffix
SECDIVTYP String 1 SecondDivisionTypeCode
Codeofthetypeofseconddivision.
SECDIVTXT String 50 SecondDivisionTypeText
Seconddivisiontypetextdescription
ACRES Double 8 AreainAcres Areaoftheseconddivisioninofficialacres.
PLSSID String 16 PLSSTownshipIdentifier
Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueidentifierforthetownship.
SECDIVLAB String 50 SecondDivisionLabel
PLSSSecondDivisionlabelforcartographicoutputorwebdisplay.
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PLSSSpecialSurvey‐FeatureClass
Name PLSSSpecialSurvey
ShapeType Polygon
FeatureTypeSimple
AliasName PLSSSpecialSurvey
Description SpecialSurveysarenon‐PLSSsurveyareasfromBLMsurveyrecordswhichrepresentfederalparcels
Purpose Thesearethegraphicrepresentationoflandtransactionsinthefederalgovernmentandmaybethoughtofasthefederalparcels
DataThemeCadastral
Field DataType Length AliasName Description
SURVTYP String 1 SurveyTypeCode
Codeofthetypeofspecialsurvey.
SURVTYPTXT String 50 SurveyTypeText
Specialsurveytypetextdescription.
SURVNO String 10 SpecialSurveyNumber
Specialsurveynumber.
SURVSUF String 5 SpecialSurveyNumberSuffix
Specialsurveysuffixdesignationthatmakestheidentificationoftheareaunique.
SURVNOTE String 50 SpecialSurveyNote
Notesaboutthepolygonfeaturethatareimportantforusingorunderstandingthefeature.FromtheBLMSurvNotesareA=ApproximateAcreage,C=ConflictorQuestionable,D=Non‐addedAcreage
ACRES Double 8 AreainAcres Officialareaofthesurveyinacresasanumber.
SURVLAB String 50 SpecialSurveyLabel
Labelthatisusedforcartographicoutputorwebdisplay.
REVISEDDATE Date 8 RevisedDate Thelastdateofrevisionforthespecialsurvey,becausespecialsurveysrepresentfederallandtransactionstheymayhavedistinctrevisiondates.
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PLSSTownship‐FeatureClass
Name PLSSTownship
ShapeType Polygon
FeatureType Simple
AliasName PLSSTownship
Description InthePublicLandSurveySystemaTownshipreferstoaunitoflandthatisnominallysixmilesonaside,usuallycontaining36sections.
Purpose ThesearethegraphicdisplaysofthePLSSTownships.
DataTheme Cadastral
Field DataType Length AliasName Description
STATEABBR String 2 StateAbbreviation
Stateabbreviationcodetwoletterpostalcode
PRINMERCD String 2 PrimeMeridianCode
PrincipalmeridiancodefromtheBLMPMCodelist
PRINMER String 40 PrimeMeridianText
Principalmeridiannameasatext
TWNSHPNO String 3 PLSSTownshipNumber
Townshipnumber.TheTownshipNumberindicatesthenumberofrowsoftownships,northorsouthfromaPublicLandSurveySystemOrigin.
TWNSHPFRAC String 1 PLSSTownshipFraction
Townshipfraction.TownshipFractionsarecreatedwhentherearegapsbetweensurveyedTownshipboundariesorduetoexcesssizeinTownshipsthatarosefromexecutingoriginalsurveys.
TWNSHPDIR String 1 PLSSTownshipDirection
Townshipdirection.ThedirectionofarowofTownshipsfromaPublicLandSurveySystemOrigin.ThesearetypicallyNorthandSouthintheWestbutmaybeEastandWestinOhio
RANGENO String 3 PLSSRangeNumber
Rangenumber.TheRangeNumberindicatesthenumberofcolumnsoftownships,eastorwestfromaPublicLandSurveySystemOrigin.
RANGEFRAC String 1 PLSSRangeFraction
Rangefraction.RangeFractionsarecreatedwhentherearegapsbetweensurveyedTownshipboundariesorduetoexcesssizeinTownshipsthatarosefromexecutingoriginalsurveys.
RANGEDIR String 1 PLSSRangeDirection
Rangedirection.ThedirectionofacolumnoftownshipsfromaPublicLandSurveySystemOrigin.ThesearetypicallyEastorWestinthewestbutmaybenorthorsouthinOhio
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TWNSHPDPCD String 1 PLSSTownshipDuplicateCode
IftherearemultipletownshipsinaPublicLandSurveySystemOrigin,StateandSurveyName,theTownshipDuplicateStatusisusedtoestablishuniqueness.WhenmorethanonePublicLandSurveySystemTownshiphasthesameTownshipandRangenumbersanddirectionsandfractions,andareinthesameState,thisattributeisusedtodistinguishamongduplicatevalues.
PLSSID String 16 PLSSTownshipIdentifier
Concatenationoftheprincipalmeridian,township,range,andduplicationcodethatformauniqueid.
STEWARD String 50 DataStewardforPLSSTownshipData
Datastewardforatownship.
TWNSHPLAB String 20 PLSSTownshipLabel
Townshiplabelthatisusedforcartographicoutputorwebdisplay
SRVNAME String 60 SurveyNameforOhioPLSSSurveys
TheOhioNamedsurveyarea,PLSSoriginalsurveyareas
SECSRVNAME String 60 SecondarySurveyNameforOhioSurveys
ThesecondarynameforOhiosurveyarea,PLSSoriginalsurveyareas
SURVTYP String 2 SurveyTypeCode
Codeofthetypeofsurvey.Thisindicatesifthetownshiphasbeensurveyed,protractedorunprotracted(extended)
SURVTYPTXT String 50 SurveyTypeText
Surveytypetextdescription.
SurveySystem‐FeatureClass
Name SurveySystem
ShapeType Polygon
FeatureTypeSimple
AliasName SurveySystem
DataThemeCadastral
Field DataType Length AliasName Description
SURVSYSTYPE String 50 Survey SurveySystemTypeindicatesthe
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SystemType categoryormajorclassofthedescription.
SURVSYSNAME String 200 SurveySystemName
TheSurveySystemNameisanidentifyingnameornumberforaspecifictypeofSurveySystemarea.
SURSYSCODE String 50 SurveySystemCodeorIndex
anycodesorindicesfortrackingormanagingthesurveysystemareas
SURSYSNOTE String 50 SurveySystemNote
anynotesontheuse,nameorapplicationofthesurveysystemarea
FIRSTDIVTYPE String 50 SurveySystemFirstDivision
TheFirstDivisionTypedescribestheclassificationoftheFirstSurveySystemDivision
FIRSTDIVNAME String 50 SurveySystemFirstDivisionName
TheSurveySystemFirstDivisionNameisanalpha,numeric,oralpha‐numericdesignatorusedtoidentifytheFirstDivisionoftheSurveySystem
SECDIVTYPE String 50 Survey System Second Division Type
The Second Division Type describes the classification of the Survey System Second Division.
SECDIVNAME String 50 SurveySystemSecondDivisionName
TheSurveySystemSecondDivisionNameisanalpha,numeric,oralpha‐numericdesignatorusedtoidentifytheSecondDivisionoftheSurveySystem.
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Parcels‐FeatureDataset
Name Parcels
Description Thisfeaturedatasetcontainsinformationabouttherightsandinterestsinlandincludingrealestateassets.Forthepublicationthisfeaturedatasetcontainstheparceldataonly
DataThemeCadastral
NSDICoreParcel - FeatureClass
Name NSDICoreParcel
ShapeType Polygon
FeatureType Simple
AliasName NSDICoreParcel
Description This is the parcel publication Cadastral NSDI or core data set that supports emergency response and other business applications
Purpose This data set is intended to provide the initial information needed to respond to and serve business applications. This data set has been developed by the FGDC Cadastral Subcommittee.
DataTheme Cadastral
Field DataType Length AliasName Description
STNAME String 2 StateName Thestatename
STFIPS String 2 StateFIPSCode
ThestateFIPScode
CNTYNAME String 50 CountyName Thecountyname
CNTYFIPS String 2 CountyFIPSCode
thecountyFIPScode3digitcode
SOURCEAGENT String 50 DataSourceAgency
Theagencythatprovidedthedata,thedatasteward
PARNO String 30 LocalParcelNumber
Thelocalparcelnumberfortheparcelrecord
NPARNO String 40 NationalParcelNumber
ThelocalparcelnumberwiththestateandcountyFIPSCodeaddedtothebeginningofthenumber
STRUCT String 1 Structure Isthereastructureorimprovementon
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Indicator theparcel(yesorno)
IMPROVVAL Integer 4 ImprovedValue
Thevalueoftheimprovementsontheparcels
LANDVAL Integer 4 LandValue Thevalueofthelandontheparcel
PARVAL Integer 4 TotalParcelValue
Thetotalvalueoftheparcel
PARVALTYPE String 15 TypeofValueReported
Thetypeofvaluereportedintheparcelvaluefields
PARUSECODE String 10 TaxParcelUseCode
Thelocalassessmentparcelusecode
PARUSEDESC String 50 TaxParcelUseCodeDescription
Thelocalassessmentparcelusedescription
OWNTYPE String 20 OwnerClassificationorType
TheownertypebasedonthetypeslistedintheLU_OWNTYPEtable
AREATXT String 20 AreaofParcelasText
Theareaoftheparcelinacresasatext
AREANO Single 4 AreaofParcelasNumber
Theareaoftheparcelinacresasanumber
OWNNAME String 100 FullOwnerName
Theprimarysurfaceownername,thefullnamemaybepopulatedorthecomponentsofthename(firstandlast)
OWNFRST String 50 OwnerFirstName
Theprimarysurfaceownerfirstname
OWNLAST String 50 OwnerLastName
Theprimarysurfaceownerlastname
SUBSURFOWN String 60 SubsurfaceOwnerName
Thenameofthesubsurfacerightslandowner
SUBOWNTYPE String 20 SubsurfaceOwnerType
ThesubsurfaceownertypebasedonthetypeslistedintheLU_OWNTYPEtable
MAILADD String 65 FullMailingAddress
Thefullmailingaddressasasinglefield,themailingaddressmayalsobebrokenintoitscomponentparts
MADDRNO String 10 MailingAddressNumber
Themailaddressnumber
MADDSTNAME String 55 MailingAddressStreetFullName
Thefullnameofthemailingstreetincludingtheprefix,thename,thesuffixthetypeanddirections
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MADDPREF String 5 MailingAddressPrefix
Themailingstreetprefix
MADDSTR String 40 MailingAdressStreetName
themailingstreetname,thenamewithoutthetypeanddirections
MADDSTTYP String 5 MailingAddressStreetType
Themailingstreettype,suchasST,AVE,BLVD
MADDSTSUF String 5 MailingAddressStreetSuffix
Themailingstreetsuffix,typicallyadirection
MUNIT String 10 MailingAddressUnitNumber
Themailingaddressunit,suiteorapartmentnumberandmayalsobethehalfnumber
MCITY String 40 MailingAddressCity
Themailingcityname
MSTATE String 2 MailingAddressState
Themailingstatename,twoletterabbreviation
MZIP String 15 MailingAddressZip
Themailingzipcode
SITEADD String 65 FullSiteAddress
Thefullsiteaddressasasinglefield,themailingaddressmayalsobebrokenintoitscomponentparts
SADDNO String 10 SiteAddressNumber
Thesiteaddressnumber
SADDSTNAME String 55 SiteAddressStreetFullName
Thefullnameofthesitestreetincludingtheprefix,thename,thesuffixthetypeanddirections
SADDPREF String 5 SiteAddressPrefix
Thesitestreetprefix
SADDSTR String 40 SiteAddressStreetName
thesitestreetname,thenamewithoutthetypeanddirections
SADDSTTYP String 5 SiteAddressStreetType
Thesitestreettype,suchasST,AVE,BLVD
SADDSTSUF String 5 SiteAddressStreetSuffix
Thesitestreetsuffix,typicallyadirection
SUNIT String 10 SiteAddressUnitNumber
Thesiteaddressunit,suiteorapartmentnumberandmayalsobethehalfnumber
SCITY String 40 SiteAddressCity
Thesiteaddresscityname
LEGDECFULL String 255 FullLegalDescription
Thefulltaxlegaldescription‐thisisgenerallyneededwhentheparceldata
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doesnotincludeamapoftheparcel
SOURCEDATE Date 8 SourceDocumentDate
Thedateofthesourcedocumentthatwasusedtogeneratetheparcelinformation
SOURCEREF String 25 SourceDocumentLinkorReference
Thereferencetothesourcedocumentcouldbeareferencetoamaporplatoradeed
REVISEDDATE Date 8 LastRevisedDate
Thedateofthelastrevisionoftheparcelrecord,thismaybetheinitialcreatedateifthatisthelastrevision
LU_Direction - Table
Name LU_Direction
AliasName LU_Direction
Description Look up table for direction codes N, E, S, W
Purpose To provide a domain for referencing source information or translating incoming data sets
DataTheme Cadastral
Field DataType Length AliasName Description
DirCode String 1 DirectionCode
theoneletterdirectioncode(N,S,E,W)
Name String 5 Direction Thefulltextforthedirection
LU_OwnerType‐Table
Name LU_OwnerType
AliasNameLU_OwnerType
Description The type of ownership is the classification of owner. In some local governments tax parcels are tagged as either taxable or exempt and the owner classification is not known. In these cases an owner types of taxable and exempt may be added to this list.
Purpose To provide a domain for referencing source information or translating incoming data sets
DataTheme Cadastral
Field DataType Length AliasName Description
OwnerTypeCD String 1 OwnerType acodefortheownertype
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Code
OwnerTypeDesc String 50 OwnerTypeDescription
thefulldescriptionoftheownertype
LU_ParcelValueType - Table
Name LU_ParcelValueType
AliasName LU_ParcelValueType
Description This is a list of the types of values for the parcel value types in the core parcel attributes. Local governments and other data stewards for parcel data may maintain a variety of values such as sales values, current market value taxable value or assessed value. This field indicates what type of value is reported in the core attributes
Purpose To provide a domain for referencing source information or translating incoming data sets
DataTheme Cadastral Field DataType Length AliasName Description
PARVALTYPE String 15 ParcelValueType
Listofvaluesfortheparcelvaluesforincomingdata
LU_PLSSFirstDiv - Table
Name LU_PLSSFirstDiv
AliasName LU_PLSSFirstDiv
Description The First Division Type of a Public Land Survey System Township is the primary or first subdivision category. If the first division type is fractional section, then the metadata for this data set will need to document how fractional sections are labeled.
Purpose To provide a domain for referencing source information or translating incoming data sets
DataTheme Cadastral
Field DataType Length AliasName Description
PLSSFirstDiv String 25 PLSS First Division Type Code
The values for the first division types
PLSSFirstDivDesc String 250 PLSS First Division Type
a description of the division types
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Description
LU_PLSSSecDiv‐Table
Name LU_PLSSSecDiv
AliasNameLU_PLSSSecDiv
Description TheSecondDivisionTypeofaPublicLandSurveySystemTownshipisthesecondsubdivisioncategory.Theseconddivisionhasbeende‐normalizedslightlytoincludeacompletenon‐overlappingrepresentationofthedivisionsofthePLSS
Purpose Toprovideadomainforreferencingsourceinformationortranslatingincomingdatasets
DataThemeCadastral
Field DataType Length AliasName Description
PLSSSecDiv String 25 PLSSSecondDivisionTypeCode
Thevaluefortheseconddivisiontypes
PLSSSecDivDesc String 250 PLSSSecondDivisionTypeDescription
Adescriptionoftheseconddivisiontypes
LU_PrincipalMeridian‐Table
Name LU_PrincipalMeridian
AliasNameLU_PrincipalMeridian
Description thecodesandnamesoftheprincipalmeridians
Purpose Toprovideadomainforreferencingsourceinformationortranslatingincomingdatasets
DataThemeCadastral
Field DataType Length AliasName Description
PrincipalMeridian String 50 PrincipalMeridianFullName
thenameoftheprincipalmeridian
PMCode String 2 PrincipalMeridianCode
theblmtwodigitcodefortheprincipalmeridian
PMShortName String 25 Principal theshortnamefortheprincipalmeridian
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MeridianShortName
LU_State‐Table
Name LU_State
AliasNameLU_State
Description statenamesandfipscodesandabbreviations
Purpose Toprovideadomainforreferencingsourceinformationortranslatingincomingdatasets
DataThemeCadastral
Field DataType Length AliasName Description
StateName String 30 StateName thestatename
StateCD String 2 StatePostalAbbreviation
thestate2letterabbreviation
StateFIPSCD SmallInteger 2 StateFIPSCode
thetwodigitstatefipscode
LU_SurSysDivision - Table
Name LU_SurSysDivision
AliasNameLU_SurSysDivision
Description Thistableprovidesthedomainofvaluesforthefirstandseconddivisionsofsurveysystems.Thesewerecombinedbecausethedivisiontypescanbecombinedandmayvaryfromstatetostate.
Purpose Toprovideadomainforreferencingsourceinformationortranslatingincomingdatasets
DataThemeCadastral
Field DataType Length AliasName Description
SurSystDivCode String 5 SurveySystemDivisionCode
codesforthesurveysystemdivisions
SurSysDivName String 50 SurveySystemDivisionName
thenameofthesurveydivision
SurSysDivDesc String 200 Survey adescriptionofthesurveydivision
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SystemDivisionDescription
LU_SurveyNameOhio‐Table
Name LU_SurveyNameOhio
AliasNameLU_SurveyNameOhio
DescriptionPublicLandsurveyareasinOhioareidentifiedbyaname.ThenamedareasdonotanoriginofPublicLandSurveySystemvalue.
Purpose Toprovideadomainforreferencingsourceinformationortranslatingincomingdatasets
DataThemeCadastral
Field DataType Length AliasName Description
SRVNAME String 60 OhioSurveySystemName
ThenamedsurveyareaswithinOhio
SECSRVNAME String 60 OhioSecondarySurveySystemName
thesecondarynameswithinthenamedareas.Thereareonlytwonamedareaswithasecondarysurveynamedareawithinthem
LU_SurveySystem‐Table
Name LU_SurveySystem
AliasNameLU_SurveySystem
Description Thisisalistofsurveysystemtypes
Purpose Toprovideadomainforreferencingsourceinformationortranslatingincomingdatasets
DataThemeCadastral
Field DataType Length AliasName Description
SurvSysTypeCode String 5 SurveySystemTypeCode
codesforthesurveysystemtypes
SurvSysType String 50 SurveySystemTypeText
thenameofthesurveysystemtype
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SurvSysDescription String 250 SurveySystemTypeDescription
thedescriptionofthesurveysystemtype
LU_SurveyType‐Table
Name LU_SurveyType
AliasNameLU_SurveyType
DescriptionValuesforthefederalsurveytypes.Thisincludesthespecialsurvey,firstandsecondsurveydivisiontypes.
Purpose Toprovideadomainforreferencingsourceinformationortranslatingincomingdatasets
DataThemeCadastral
Field DataType Length AliasName Description
SurveyTypeCD String 2 SpecialSurveyTypeCode
thesurveytypecode
SurveyTypeName String 50 SpecialSurveyTypeText
thenameofthesurveytype
Description String 200 SpecialSurveyTypeDescription
thedescriptionofthesurveytype
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AppendixB–PLSSCornerStandardIdentifier
IntroductionThispaperdescribesastandardpointidentifierforPublicLandSurveySystem(PLSS)corners.ThisstandardpointidentifierconformstotherequirementsoftheFederalGeographicDataCommittee(FGDC)CadastralDataContentStandardrequirementsforauniqueidentifierforcadastralcorners.Thestandardsystempresentedhereallowspublishedcoordinateinformationtoberelatedtosourcedataandtoperpetuatecorneridentifiersascoordinatevaluesforcornersareimprovedovertime.TheuniquenessofthesurveypointidswillhelpfacilitatedatamaintenanceanddatasharingwithintheBureauoflandmanagement(BLM)andotherCadastralReferencedatastewards.Thispaperdescribestheformatandstructureofthecornerpointidentifiersforthepublicationofcornerinformationthatconformstothenationalcadastraldatastandards.PLSSPointsTheGeographicCoordinateDataBase(GCDB)usesasix‐digitnumberingsystemtonamePLSSpointsinatownship.Thissix‐digitcornernumberisonlyuniquewithinaPLSStownship.Thisnumberisrepeatedineachtownship,tomakeiteasiertodeterminethelocationofacornerwithinaTownshipbyitsnumber.Thefirstthreedigitsofthisnumberrefertotheeast‐westpositioninthetownship.Thesecondthreedigitsindicatethenorth‐southpositioninatownship.Thefollowingpictureshowsthecornernumberingconventionforasingletownshipsubdivideddowntosections.Thisnumberingschemeisrepeatedineachtownship.
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Duetothisnamingconvention,fouradjacenttownshipswillnamethesamecornerfourdifferentways(100100,100700,700700,700100).Eachcornernumbershouldhavetheexactsamecoordinatevaluesbecausethisisinfactthesamecorner.Thefollowingpictureshowsanexampleofthepointduplicationattownshipcornersandtownshiplineswheresectionssubdivisionsarecoincident.
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UniquePLSSCornerNumbersTomakethecornernumbersunique,theproposalistoaddapointprefixtothePLSScornernumber.ThisprefixisaconcatenationoftheState,PrincipalMeridian,TownshipandRangeinwhichthepointresides.ThispointprefixcanbederivedfromthedirectorystructureoftheoutputdirectoryfromtheBLM’sDataPreparationSoftware(DCCSV1.04)orfromtheattributesinthestandardPLSSTownshipFeatureclassesandisastandard15characterslong.ThisidentifierhasbeentermedthetownshipidentifierorTWIPinothersystems.Theuniquenessisestablishedbymakingabusinessrulethatthelowestsixdigitcornernumberwillbecometheprimarynumberandallothernumberswillbecomealiasesorothercornernumbersforthesamecorner.Thefollowingdiagramshowstheproposedcornernumberingconvention.
Township duplicate (0, A or B) State Township Range
AZ230490N0130W0_240400
GCDB Point ID Principal Meridian (2 digit code) Township and Range ( 5 characters) 3 digits for Township or Range number
1 digit for fraction 0 for no fraction, 1 for ¼ township, 2 for ½ township, 3 for ¾ township
1 letter for direction
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References
AuthorityandAuthoritativeSources:ClarificationofTermsandConceptsforCadastralData(2008),http://www.nationalcad.org/showdocs.asp?docid=1045&navsrc=Report&navsrc2=
Becauseoflegalissuesrelatedtoownershipandrightsinlandtheuseofthetermsauthorityandauthoritativeforcadastraldataneedtobeclearlyarticulated.Thisdocumentdefinesanddiscussesthetermsauthoritativedata,authoritativedatasource,authoritativesource,authority,authorization,datastewards,trustedsourceandtrusteddataintermsthatcanbeappliedtoanydatasourcewithexamplesthatapplyspecificallytocadastraldata.
CadastralNSDIReferenceDocument,(2007)http://www.nationalcad.org/showdocs.asp?docid=158&navsrc=Report&navsrc2=
Thisdocumentreplacesthecoredatastandard.ThisdocumentdescribesthedataandorganizationalrelationshipsforthemaintenanceofthedatathatistheCadastralNSDI.ThisdocumentservesasastandardfortheCadastralNSDIcontent.
IAAOandFGDCCadastralSubcommitteeWorkshop:SharingParcelDatatoProtectandRebuildCommunities(2008),http://www.nationalcad.org/showdocs.asp?docid=1030&navsrc=Report&navsrc2=
IAAOandFGDCCadastralDataSubcommitteesponsoredaworkshoponFeb25,2008atthe2008GIS/CAMATechnologyConference.Thepurposeoftheworkshopwastoexploretheadvantages,opportunitiesandissuesofsharingparceldatafromgovernmenttogovernment.
NationalSpatialDataInfrastructure(2008)http://www.fgdc.gov/nsdi/nsdi.html
ThiswebpagedefinesthehistoryandprinciplesofthenationalSpatialDataInfrastructure.
ProductionandPublicationAConceptforGeographicInformationEnvironments,(2002),http://www.nationalcad.org/showdocs.asp?docid=22&navsrc=Report&navsrc2=
Theproductionenvironmentistheproductionandmaintenancecomponentforgeographicinformation.Thepublicationenvironmentistheconsumptiveenvironment.Thisdocumentdescribestheseconceptsandenvironments
CadastralSubcommitteeMeetingNotes,(2003)PortlandOregon,hostedbytheForestService,http://www.nationalcad.org/showdocs.asp?docid=1048&navsrc=Organization&navsrc2=MeetingDoc
ThesemeetingnotessummarizesomeoftheearlydiscussionsonthepolicesandneedsforestablishingarobustCadastralPublicationDataStandardfortheNSDI.