路线走廊带投影变形的控制方法研究

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1、AbstractBasedonanalyzingthecausesoflarge-scaleandlong-distanceribbontypeengineeringprojectiondistortion,theprojectiondistortioncontrolmeasuresaresystematicallystudiedandsummarizedinthispaper.Besides,thecoordinateadjustmentprocessforthesupportingterrainandlinearealsodiscusse

2、d.Andmoreover,thetoleranceanalysisofweakeningrouteengineeringprojectiondistortionareputforwardcreatively.Throughtheanalysisofconformalprojectionlengthdeformationformulaandrelatedinfluencefortheprojectconstruction,theprogramcanbedesignedtooptimizeandsolvelongitudedifference(

3、Dj)andcompensationplaneelevation(H0)withanalyzingthecomprehensivedeformationformulaofconformalprojectionlengths,whichcanoptimizeandestablishoneormorerelativelyindependent,butunifieddynamicprojectionmethodassociatedwithnationalgeodeticcoordinatesystem.Andwhat’smore,theprojec

4、tionmethodhascompensationplaneintheGaussprojectioncoordinatesystemofanyprojectionzone.Afterprojectcountercoordinatesystembeensetup,coefficientofcoordinateconversionformulacanbecalculatedaccordingtothecontrolpointswhichareprovidedbythesurveyorsunderallkindsofcoordinatesystem

5、s.Andthenthetranspositionbetweendifferentcoordinatesystemscanbeestablishedintheprogramdesign,duringcheckingthemeansquareerrorwithconversionandselectingtheoptimalcoefficientandcontrolpile.Severalsupportingworksforhandlingprojectiondeformationareintroducedinthisarticle,asfoll

6、ows:i)underthenationalgeodeticcoordinatesystemorotherseparatecoordinatesystems,drawingthecurvedlinebetweenthepointsofintersectionwhentransposingtothelinespacesmapsofcountercoordinatesystem;“S”curevesadjustment;markofstakeinitialization;labelingthemainpointsonthecurves;gener

7、atingthecounterlinesandcurvestableandpilescoordinatetable.ii)Aftertheshopdrawingdesignscompletedunderthecountercoordinatesystem,transposingtheLandmarkscoordinatetothenationalgeodeticcoordinateandsubmittingthemtotheLandandResourcesAdministrationDepartmentformanagement,statis

8、ticsandlocating.iii)Translationcheckingcalculationofthelinespacemapandtopographicm