DEM內(nèi)插評價模型與應用系統(tǒng)開發(fā)研究.pdf

1、南京師范大學碩士學位論文DEM內(nèi)插評價模型與應用系統(tǒng)開發(fā)研究姓名：任志峰申請學位級別：碩士專業(yè)：地圖學與地理信息系統(tǒng)指導教師：劉學軍20080501ABSTRACTInterpolationiSanapproximationprobleminmathematicsandanestimationprobleminstatisticsItiSalsooneofthecoretechniquesindigitalterrainmodeling

2、asitiSinvolvedinthevariousstagesofthemodelingprocesssuchasqualitycontrol，surfacereconstruction。accuracyassessment。terrainanalysis。andapplicationsBeforeinterpolationbeingused。ithastobedecidedtochooseaninterpolationmethodi

3、ncludingitsmodelsandparameters1tiSbelievedthatskillsofexploratoryspatialdataanalysis(EDA)andexperiment／understandingwithinterpolationalgorithmscausegoodconstruct：ionofinterpolatedsurfaceWhileGISbeingwidelyusedmanypeople。

4、especiallybeginnersinGISorresearchersinothersfields，feeIperplexedaboutspatiaIdatainterpolationandevenmaketerriblemistakesThisresearchmakesnoeffortindevelopinganewinterpolationalgorithm，butexploresamethodologyabouthowtoin

5、terpolatewhilepeoplearein“bad”situationdescribedabove，thattheydonotknowmuchaboutkindsofinterpolationmethodsandEDAand／ormaybetheyhavenoaccuracydescriptionabouttheinputdataAsoftwareformedasapluginofESRIArcMapiSdevelopedtor

6、ealizethisassessmentsystemofinterpolationmethodsTherearetwoimplicitassumptionsbehindinterpolationtechniques：(a)theterrainsudaceiScontinuousandsmoothand(b)thereiSahighcorrelationbetweentheneighboringdatapointsEachinterpol

7、ationmethodobeystheserules。andthedifferenceofinterpolationalgorithmtoeachotheriShowthepredictedpointcorrelateswiththeinputpointsfromtheneartothedistantConsideringwiththisrouteauniformconceptuaImodelofinterpolationiSprese

8、nted，whichiSthebaseofaderivationofthespatialdistributionofinterpolatedDEMerrorThiskindoferrormapusinginthisassessingsystemiSconsideredtobeanextensionoftheKrigingerrormaptootherinterpolationalgorithms。andprovidespeoplethe

9、errordistributionnomatterwhichmethodtheychoosetouseBesidesthissubsetvalidationiSintroducedtothesystemtocomparesomecommoninterpolationmethodswithRootMeanSquareErrorandMeanErrorasitsindexeswhichprovidespeopletheappropriate