专题7.2 envi中用RPCS进行正射校正.pdf

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1、ENVITutorial:OrthorectifyingImageryusingRationalPolynomialCoefficients(RPCs)TableofContentsOVERVIEWOFTHISTUTORIAL.....................................................................................................................................2INTRODUCTIONTORP

2、CORTHORECTIFICATION................................................................................................................3ORTHORECTIFYANIKONOSIMAGE..........................................................................................................

3、....................4ViewImages.....................................................................................................................................................4RuntheOrthorectification..........................................................

4、........................................................................4ExaminetheOrthorectificationResults................................................................................................................5Tutorial:OrthorectifyingImageryusingRPCsOv

5、erviewofThisTutorialThistutorialdemonstratesENVI'sorthorectificationtoolsthatuserationalpolynomialcoefficients(RPCs).YouwillorthorectifyanIKONOSimageofLaJolla,California,USA,courtesyofSpaceImaging.Youwillthencomparetheorthorectifiedimagetotheuncorrectedimageandex

6、aminethedifferences.FilesUsedinThisTutorialCD-ROM:TutorialDataCD#2Path:envidataorthoFileDescriptionconus_usgs.demUSGSdigitalelevationmodel(DEM)fortheareaoftheIKONOSimagepo_101515_metadata.txtMetadatafilefortheIKONOSimagepo_101515_pan_0000000_rpc.txtTextfileconta

7、iningRPCspo_101515_pan_0000000.tfwTIFFworldfilecontaininginitialgeoreferencinginformationpo_101515_pan_0000000.tif(.hdr)IKONOSimagedatainTIFFformat2ENVITutorial:OrthorectifyingImageryusingRPCsTutorial:OrthorectifyingImageryusingRPCsIntroductiontoRPCOrthorectifica

8、tionOrthorectificationisaprocessofmakingthegeometryofanimageplanimetric,ormap-accurate,bymodelingthenatureandmagnitudeofgeometricdistortionsintheimagery.Thesed