Recentdevelopmentinremotesensingtechnologieshasstimulatedagreatinterestinitsapplicationin
large-scale mapping.Forexample,theIkonossatelliteimages,availablesince2000,haveanimproved
resolution of1mthataffordmappingofalotofgroundobjectsfromthesatelliteimages.However,the
use oftheseimagesinhigh-accuracymappingapplicationshasbeenlimitedsincethesensormodel
parameters arenotyetreleased.Ontheotherhand,LightDetectionandRanging(LIDAR)isafast
methodforsamplingtheearth’ssurfacewithahighdensityandhighaccuracypointcloudthatisused
to generatehighdensityandhighaccuracyDigitalElevationModels(DEMs)andDSMs.Integratingboth
technologies makesitpossibletoprovidereliableandautomaticsolutionsforlarge-scalemapping
applications,3-Dvisualization,GISandchangedetection.Inthisresearcha1-mresolutionLIDAR-based
DEM isusedtoorthorectifyasingleGeo-panchromaticIkonosimage.TheLIDAR-basedDEMisfirst
rectified using12GroundControlPoints(GCPs)surveyedusingtheDifferentialGPS(DGPS)technique.
The LIDAR-basedDEMisthenusedasasourceforotherGCPsthatareusedtoorthorectifytheIkonos
image. Different2-DtransformationmodelsareusedwithdifferentsetsanddistributionsofGCPs.The
planimetricRootMeanSquareErrors(RMSE)achieved,usingthesemodels,isabout5m.The
relationship betweentheplanimetricerrorsandtheelevationsofthecheckpointssuggestedusing3-D
to 2-Dtransformationmodels.Threedifferenttypesofthesemodelsareexaminedandtheirresultsare
reported. Theresultsshowedthatlessthan2mmappingaccuracycouldbeachievedusingthe3-Dto
2-D transformationmodels.TheseresultssuggestthatusingasinglepanchromaticIkonosimage
togetherwitha1-mresolutionLIDAR-basedDEMcouldachievetherequiredplanimetricaccuracyfor
1:5000topographicmaps.