Geographic Information Geographic Information SystemsSystems

Other Digital DataOther Digital Data

1. Digital Line Graph1. Digital Line Graph► Base cartographic data, distributed Base cartographic data, distributed by USGSby USGS

http://spatialnews.geocomm.com/whitepapers/usgs_dlg.pdf

Map created from USGS DLG culture data showing contours, roads, section lines, lakes and streams

1. (1) DLG - Data 1. (1) DLG - Data ContentContent

► Planimetric dataPlanimetric data

- include transportation, - include transportation, hydrography, administrative, and hydrography, administrative, and political boundariespolitical boundaries

► Topographic data Topographic data

- portray relief- portray relief

► Include spatial data, attribute data, Include spatial data, attribute data, and topologyand topology

1. (2) Data Availability1. (2) Data Availability► Large-Scale (1:24,000) Large-Scale (1:24,000)

► Intermediate-Scale (1:100,000)Intermediate-Scale (1:100,000)

► Small-Scale (1:2,000,000) Small-Scale (1:2,000,000)

DLG Data Availability ..DLG Data Availability ..1:24,000 1:24,000

7.5'x7.57.5'x7.5'    '   

1:100,01:100,000 00

30'x30' 30'x30'

1:2,000,01:2,000,000 00

multi-multi-statesstates

Boundaries - state, county, cityBoundaries - state, county, city ×× ×× ××Hydrography -streams and water bodies Hydrography -streams and water bodies ×× ×× ××Public land survey system - Public land survey system - rectangular system rectangular system

×× ××

Transportation - roads/trails, Transportation - roads/trails, railroads, pipelines railroads, pipelines

×× ×× ××

Other manmade structures - ski lift Other manmade structures - ski lift ××Hypsography - contour lines Hypsography - contour lines ×× ×× ××Surface cover - vegetative Surface cover - vegetative ××Non-vegetative surface cover - sand, Non-vegetative surface cover - sand, gravel, etc gravel, etc

××

Survey control and markers  - Survey control and markers  - positions and elevations positions and elevations

××

Map scaleData content

1.(2) Large-Scale 1.(2) Large-Scale (1:24,000) DLGs(1:24,000) DLGs

► Correspond to the USGS 1:24,000 Correspond to the USGS 1:24,000 scale topographic quadrangle mapsscale topographic quadrangle maps

► Primarily cast to the UTM Primarily cast to the UTM projection system, but some are cast projection system, but some are cast to the State Plane coordinate systemto the State Plane coordinate system

http://www.cnr.umn.edu/FR/courses/FR3131/Week6update.pdf

Streams layer of Clarence

1:24,000-Scale DLG data ..1:24,000-Scale DLG data ..

West Rapid City, SD West Rapid City, SD

http://edc.usgs.gov/geodata/exampldlg24k.html

1.(2) Intermediate-Scale 1.(2) Intermediate-Scale (1:100,000) DLG(1:100,000) DLG

► Derived from USGS 30x60-minute Derived from USGS 30x60-minute quadrangle mapsquadrangle maps► Cast to the UTM projection system and Cast to the UTM projection system and are referenced to either NAD27 or NAD83are referenced to either NAD27 or NAD83► Available products :Available products :

- Individual 1:100,000 DLGs - Individual 1:100,000 DLGs

- 1:100,000-Scale Hydrography - 1:100,000-Scale Hydrography

and Transportationand Transportation

1:100,000-Scale DLG data ..1:100,000-Scale DLG data ..

Coeur Coeur D'Alene, D'Alene,

ID-MTID-MT

http://edc.usgs.gov/geodata/exampldlg100k.html

1.(2) Small-Scale 1.(2) Small-Scale (1:2,000,000) DLG(1:2,000,000) DLG

► Derived from the USGS sectional maps Derived from the USGS sectional maps from the from the U.S. National Atlas U.S. National Atlas► Available products :Available products :

Current: date between 1990 and Current: date between 1990 and 19941994

Historical between 1973 and 1980 Historical between 1973 and 1980

Example of 1:2,000,000-Scale DLG Example of 1:2,000,000-Scale DLG Data of the Illinois and Missouri Data of the Illinois and Missouri

StatesStates

Hydrography Hydrography

http://edc.usgs.gov/geodata/exampdlg.html

Boundaries, hydrography, and roads

2. Land Use and Land 2. Land Use and Land Cover Digital Data Cover Digital Data

(LULC)(LULC)

► Distributed by USGSDistributed by USGS

- 1:250,000 - 1x1 degree- 1:250,000 - 1x1 degree

- 1:100,000 - 30x60 minutes- 1:100,000 - 30x60 minutes

2. LULC Data Contents2. LULC Data Contents(1) Land use and land cover   Anderson Classification System Level I(2) Political unit   state, county, and city boundaries(3) Census county subdivision    census tracts for MSA(4) Hydrologic unit    An 8-digit Hydrological Unit Code, region, sub-region, accounting, and cataloging unit

(5) Federal land ownership

Anderson Classification Anderson Classification System System Level ILevel I

11 Urban or build-up land Urban or build-up land

22 Agricultural Agricultural

33 Rangeland Rangeland

44 Forest land Forest land

55 Water Water

66 Wetland Wetland

77 Barren land Barren land

88 Tundra Tundra

99 Perennial snow or ice Perennial snow or ice

1:100,000 LULC Data1:100,000 LULC Data

Anderson classification Anderson classification systemsystem                                  

1:250,000 LULC Data 1:250,000 LULC Data

http://edc.usgs.gov/geodata/exampleslulc.html

Spokane, WA, land use/land cover, census, and political units

National Land Cover National Land Cover Database (October 1999 Database (October 1999

Status)Status)

http://aria.arizona.edu/slg/Vandriel.ppt

Hydrologic UnitHydrologic Unit

An 8-digit Hydrological Unit Code, region, sub-region, accounting, and cataloging unit

3. Soils Data3. Soils Data ► Developed by USDA Natural Resources Developed by USDA Natural Resources Conservation Service (NRCS)Conservation Service (NRCS)

► Soil Survey Geographic Data Base Soil Survey Geographic Data Base ((SSURGOSSURGO) )

► State Soil Geographic Data Base State Soil Geographic Data Base ((STATSGOSTATSGO) )

► National Soil Geographic Data Base National Soil Geographic Data Base ((NATSGONATSGO) )

3. Soils - SSURGO3. Soils - SSURGO

► Soil Survey Geographic Data Base Soil Survey Geographic Data Base (SSURGO)(SSURGO)

► 1:24,0001:24,000, 7.5'x7.5'quads, 7.5'x7.5'quads► Based on aerial photographs and field Based on aerial photographs and field surveysurvey

► Map unit: Map unit: soil seriessoil series    

► Attributes: physical, chemical, Attributes: physical, chemical, biological, land use, etc. biological, land use, etc.

SoilsSoils

SSURGOSSURGO                                  

Soils - STATSGOSoils - STATSGO

► State Soil Geographic Data Base State Soil Geographic Data Base (STATSGO)(STATSGO)

► 1:250,0001:250,000, 1x2 degree coverage, 1x2 degree coverage► Map unit: Map unit: soil associationsoil association► Attribute: 60 soil propertiesAttribute: 60 soil properties

► Attribute structureAttribute structure

    

STATSGO Map UnitSTATSGO Map Unit

STATSGO data user guider page 5

STATSGO Map Unit ..STATSGO Map Unit ..► STATSGO map units consist of 1 to STATSGO map units consist of 1 to 21 21 componentscomponents

► For For each componenteach component, there are , there are 60 soil 60 soil propertiesproperties

► For each component, there are 1 to For each component, there are 1 to 6 soil 6 soil layerslayers

► For For each layereach layer, there are , there are 28 soil properties28 soil properties; ; for example, percent clayfor example, percent clay

► A map unit identifier created by A map unit identifier created by concatenation of the two-character State FIPS concatenation of the two-character State FIPS code and a three-digit Arabic numbercode and a three-digit Arabic number. . It It uniquely identifies a map unit within a Stateuniquely identifies a map unit within a State

STATSGO STATSGO AttribuAttributestes

A set of relational tables is used to store the attributes for the Map Unit and its Components

http://www.ncgc.nrcs.usda.gov/products/datasets/statsgo/data/ny.html

http://www.nysaes.cornell.edu/hort/faculty/pool/NYSite-Soils/nysoilmap.jpg

http://www.srbc.net/gis/map_gallery.html

3. Soils - NATSGO3. Soils - NATSGO

► National Soil Geographic Data Base National Soil Geographic Data Base (NATSGO)(NATSGO)

► 1:7,500,0001:7,500,000► Used primarily for national, Used primarily for national, regional, and multi-state resource regional, and multi-state resource assessment, planning, and monitoringassessment, planning, and monitoring

UNESCO SoilsUNESCO Soils

The Digital Soil Map of the World (version 3.0) was released in May The Digital Soil Map of the World (version 3.0) was released in May 19941994

Scale of 1:5,000,000Scale of 1:5,000,000

4. Digital Raster Graphics4. Digital Raster Graphics

Developed by USGSDeveloped by USGS

► A raster image of a scanned USGS A raster image of a scanned USGS topographic map topographic map georeferenced to the UTM gridgeoreferenced to the UTM grid► Useful as a background layer in a Useful as a background layer in a GIS, or to be merged with other GIS, or to be merged with other digital data to produce a hybrid digital data to produce a hybrid digital filedigital file

http://topomaps.usgs.gov/drg/

http://en.wikipedia.org/wiki/Digital_raster_graphic

4. New York State Data 4. New York State Data SetsSets

► http://cugir.mannlib.cornell.edu/ ► http://www.nysgis.state.ny.us/► http://nationalmap.gov/viewer.html

Example USGS DLG (Digital Line Graph) file showing roads, streets, rivers, etc

Land Cover Map of the Land Cover Map of the Unites StatesUnites States

http://www.nasa.gov/vision/earth/environment/Land_Cover_Change.html

http://www.css.cornell.edu/courses/420/lecture8.ppt

3. Soils - SSURGO Map 3. Soils - SSURGO Map UnitUnit

http://dusk2.geo.orst.edu/virtual/bolstad.pdf

http://nris.state.mt.us/gis/gisdatalib/mtmaps.aspx

STATSGO Table RelationshipsSTATSGO Table Relationships

STATSGO data user guider page 10

► A set of relational tables is used to store the attributes for the Map Unit and its Components

STATSGO data user guider page 10

► http://geospatialrevolution.psu.edu

http://www.ncgc.nrcs.usda.gov/products/datasets/ssurgo/index.html