Changes between Version 2 and Version 3 of MapGuideRfc55

Timestamp:

Aug 11, 2008, 9:53:43 AM (16 years ago)

Author:

hugueswski

Comment:

--

MapGuideRfc55

@@ -66 +66 @@
 The build process documentation will have to be updated to explain how to get and build CS-Map and then build !MapGuide using CS-Map instead of PROJ4.[[BR]]
 
+Concerning the possible risk that users would see differences from one application to the next when moving from PROJ4 to CS-Map, this may indeed impact !MapGuide because of the differences between Proj4 and CSMap. Ie: supported projections, the way transformations are calculated, or slightly different coefficient precision in the coordinate system definitions, etc...[[BR]]
+Any of the well known and highly used systems in CS-Map is unit tested with a list of test points that should be transformed to an expected target point within a certain tolerance. This test points in this list typically come from official sources. We can expect slightly different results between the two libraries depending on the reasons listed above but if there is a large difference between the two products, and we have valid test points for a given transformation to test what is expected, the resulting defect we would be facing in that case in the algorithm or in the system definition will have to be fixed.
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 == Test Plan ==