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proj4string contains a command that is not understood

Feb 24, 2011 at 3:55 PM
Edited Feb 27, 2011 at 6:38 AM


According to the discussion, I downloaded corrected files and generated new dll to solve labellayer null problem.

When I change the project references to the new ones (controls, data, data.forms, symbology, topology), I get this error in the execution window :

"the to parameter is not supported and will not process the rest of this string

proj4string contains a command that is not understood. It may be missing an '='"

My program contains only demo described here . The message appears before the form1_load (I put a break there). It doesn't happen when I go back to the old references of the current version (DotSpatial 12-15-2010).

Thanks to explain if this problem comes from me or from sources files.

I'm using Windows 7/x64/VS 2010

dostpatial source 1ff37008fede (2011, Feb, 25)


Feb 27, 2011 at 8:44 AM
Edited Feb 27, 2011 at 5:58 PM

OK, so I found that the message comes from dotspatial.ParseProj4String (see comments for "+to" in DotSpatial.Projections.ProjectionsInfo.ParseProj4String) and two projections definitions in WorldSpheroid.cs that contains "+R_A" parameter which is not understood. R_A seems required for Miller and VanderGrinten projections, don't ask me more !

By the way, it inpired me a few things :

1) In Map.cs, Configure, I noticed an extent initialization with (-180,180,-90,90) instead of (-180,-90,180,90) as the second parameter is ymin and third is xmax.

2) Couldn't it be possible to load those 3 hundreds definitions just if required ?

3) There is also a problem with the "to" parameter which is not managed, towgs is not managed either by Arcgis. but dotspatial code stops (break instead of continue) and should continue to process the rest of the string.