Transcription of Datums, Coordinate Systems, Coordinate Reference …
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Datums, Coordinate Systems, Coordinate Reference …
Datums, Coordinate Systems, Coordinate Reference Systems and datum TransformationsDean C. Mikkelsen, , Warmerdam, OSGeo, FWToolsFOSS4G2007 Sept. 2007 Victoria, BC ! " # $ % " # $ " # & ' " # " # ( # ) $ * # + , - .. $ . / ' 0" # 1 2 2 2 2 2 2 2 2 .. ! 3 # ! 3 # ! 3 # ! 3 # ! 3 # ! 3 # ! 3 # ! 3 # Latitude and Longitude areNOT UNIQUE!NOT UNIQUE!'# / .. # 0" # 1 0" # 1 ! 4 4 . 4 . * 4 . 4 - # "35 ! 6% - $ + ' / Geoid (MSL)SphereEllipsoid / SpheroidWGS72/84. 7 # . 7 # . 7 # . 7 # . 7 # . 7 # . 7 # . 7 # * * * * * * * * " # " # " # " # " # " # " # " # Used for a specific region North America, Europe, South America etc.
WGS 84, these yield transformations from Local Datum to WGS 84. • Scale and Rotation terms are important and cannot be ignored. Y WGS 84 X WGS 84 WGS 84 Origin WGS 72BE Origin 1.9 m X WGS 72BE 0.814” D-scale = -0.38ppm for WGS 72BE to WGS 84 Z WGS 84
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