[mapguide-internals] RE: [mapguide-users] Adding a Coordinate System to MGE/MGOS

[Bruce Dechant]

The current thinking is that we will still support both PROJ4 and Mentor.
Perhaps a compile time flag to control which you want to use - details have not been worked out.
The intention is to still release Mentor under LGPL.

For the modifying/creating/deleting coordinate systems this is much easier with Mentor because the Mentor API supports it and we (Autodesk) are familiar with using it to do these tasks (ie: Map can already do this). The CS API in 2.0 currently has APIs for updating the coordinate system dictionaries, but the PROJ4 implementation currently throws "not implemented exceptions" when you try to use these APIs. We wanted to get the updated CSAPI framework in place so that when Mentor is open sourced users will be able to benefit right away. For PROJ4 it would be nice if someone in the open source community more familiar with PROJ4 would update these to actually do what is needed.

Bruce

-----Original Message-----
From: mapguide-internals-bounces at lists.osgeo.org [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of Jason Birch
Sent: Friday, December 14, 2007 1:34 PM
To: MapGuide Internals Mail List
Subject: [mapguide-internals] RE: [mapguide-users] Adding a Coordinate System to MGE/MGOS

Is the current thinking that we pull PROJ.4 entirely out of MapGuide, or
that we continue to support both projection engines through some kind of
configuration?

I see that making Mentor the default projection engine would solve a lot
of headaches for users of Studio and Map 3D, I wonder if there may be
users who will want to continue using PROJ.4 in MapGuide to match the CS
transforms used in their other open source applications.

The press releases have indicated that Mentor will be released under
LGPL.  Is that still the intention?

Frank, (anyone?) do you have any thoughts on how PROJ.4 and Mentor will
be co-existing in the future?

Jason

-----Original Message-----
From: Bruce Dechant
Subject: RE: [mapguide-users] Adding a Coordinate System to MGE/MGOS

Once Mentor is open sourced you will be able to use the MapGuide API
directly to add/modify/delete coordinate system definitions.
The API is already in open source 2.0 right now it is just not hooked up
to PROJ4.
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