OPERATIONALIZING THE USE OF TOTAL STATION IN HIGH...
Transcript of OPERATIONALIZING THE USE OF TOTAL STATION IN HIGH...
OPERATIONALIZINGTHEUSEOFTOTALSTATIONINHIGH-ORDERED
LEVELING
144thANNUALREGIONALCONVENTION
GEODETIC ENGINEERS OF THE PHILIPPINES 44TH GEP ANNUAL REGIONAL CONVENTION
(REGIONAL DIVISION III)
LOUIEP.BALICANTAChair,UPDGE
Director,UPTCAGPFelipeF.CruzProfessorialChairinGeodeEcEngineering
Geodesy,Survey,LandAdministra=onandValua=onLaboratoryU.P.DepartmentofGeodeEcEngineering
Otel Pampanga, Skye Plaza Bldg., Lazatin Boulevard, San Agustin, City of San Fernando, Pampanga
March 16-17, 2018
OPERATIONALIZINGTHEUSEOFTOTALSTATIONINHIGH-ORDERED
LEVELING
FelipeF.CruzProfessorialChairinGeodeticEngineering
Louie P. Balicanta
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INTRODUCTION
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ΔE
LEVELING
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INTRODUCTION
GNSSLeveling
Indirect/TrigonometricLeveling
DirectLeveling11THProfessorialChairColloquium
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RESEARCHMOTIVATIONWhyTLwithTS?
• Duetotheadvancementintotalstationtechnology
• leastreadinginangularanddistancemeasurementhasimprovedovertheyears
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RESEARCHMOTIVATIONPhase1(Balicanta,Ines&Ramsa2012)• fixed experimental set-ups between points on the
ground fronting Melchor Hall, UP Diliman and points at the third floor of the same building
• high ordered leveling of at least third order accuracy can be achieved
Phase 2 – this research • Vertical control establishment • To operationalize the use of TS for H.O.Leveling
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REVIEWOFRELATEDLITERATUREErrorSources:C&Reffect
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ErrorSources:IncidenceAngle
TotalStationLaserPathwithIncidenceAngle
REVIEWOFRELATEDLITERATURE
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ErrorSources:IndexErrorREVIEWOFRELATEDLITERATURE
• observed if the TS is not perfectly leveled therebyaffectingtheverticalangle(Cruikshank,2005)
• DoubleCenteringMethod
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ErrorSources:PrismMarkerOffsetREVIEWOFRELATEDLITERATURE
α
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LeapFrogMethodREVIEWOFRELATEDLITERATURE
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METHODOLOGY
TotalSta=onDifferen=alLeveling
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ExperimentalSet-up• NikonNPR-332
• TopconDigitalLevel(forValidation)
• Indexerror=22”
• Diff.ΔElev<=12mmsqrt(K)
<=8.4mmsqrt(K)<=4mmsqrt(K)
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RESULTSTable1:PrecisionAssessmentbetweentheTwoSetsofTSLeveling
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RESULTSTable2:AccuracyAssessmentbetweenAdjustedDigitalLevelDE
andAverageDETSLeveling
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RESULTSTable3:Timespentforeachlevellinefordigitallevelandtotalstationdifferentialleveling
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CONCLUSION&RECOMMENDATION• AmethodologytoperformTSdifferentiallevelingwasprovidedthatcanbeusedbysurveyingpractitioners.
• Resultsoftheexperimentshowedthathighorderedlevelingatleastthirdordercanbeachievedwiththeuseofa1secondand1mmleastreadingTS
• Fullcapabilityofusingtheunitwasnotfullymetsincemostofthelevellineshasverticalanglereadingnotmorethan5degreesandmaximumdistancelessthan150meters
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CONCLUSION&RECOMMENDATION• TimespentforbothdigitallevelandTSlevelingseemstobecomparablebutstillinconclusive
• Recommendedthatadditionalresearchandexperimentsbedoneusinglongerlevellinesandusingpointsthatarehighlyelevatedordepressedtoobtainverticalanglesgreaterthan5degreestofurthertestthecapabilityofTSforhighorderedlevelingworks
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ACKNOWLEDGEMENT• FelipeF.CruzProfessorialChairinGeodeticEngineering,thedonoroftheprofessorialchair
• formerstudentsofGE117:ACBongat,JeffreyDelica,MiaShairaEstabillo,MarvyFuntilon,AnaMargaritaGuillermo,JillianGulles,MikkaLagrimas,GraceSinadjanandJaraKayeVillanuevaforprovidingassistanceintheconductofthefieldworks(alsoJewelIglesia,theoneinthepicture)
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REFERENCESAnderson, J.M. and Mikhail, E.M. (2002). Surveying Theory and Practice 7th Edition, McGrah-Hill.
Balicanta, L.P., Ines, L.C, Ramsa, R.S. (2012). High-Ordered Differential Leveling with Total Sation using Modified Field Techniques and Systematic Corrections. 1st Philippine Geomatics Symposium (p. 7). Quezon City: UP Department of Geodetic Engineering.
Ceylan, A., and Baykal, O. (2006). Precise Height Determination Using Leap-Frog Trigonometric Leveling. Journal of Surveying Engineering, 118-123.
Cruikshank, K. (2005, March 25). Use of the Electronic Total Station-I. Introduction and basic techniques. Retrived November 13, 2012, from Portland State University: http://geomechanics/geol/pdx.edu/Surveying/Handouts/JGE%20Paper%201%20-%20Introduction.pdf
Lee, J., and Rho, T. Application to Leveling Using Total Station, FIG, (p.10).