[mapguide-users] Fusion and Open layers Coordinate systems

[Scott hameister]

With all the Options For MgCoordinateSystem is there a way to tear all the
Ellipsoid info etc out and feed it into OpenLayers where an EPSG can't be
found?
PS How do you use MapGuide to find out if your coordinate system has an EPSG
equivalent?

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Mike Adair
Sent: Wednesday, October 07, 2009 11:02 AM
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] Fusion and Open layers Coordinate systems

I'm currently working on a patch to retrieve the projection info from 
the map definition for MapGuide.  The problem is that MG uses WKT and 
OpenLayers/Fusion uses EPSG codes and MG doesn't always have an EPSG/WKT 
mapping available.  So I will be implementing this so that if MG returns 
a valid EPSG code it will use that, otherwise it will take a value from 
the ApplicationDefinition file, and if there still isn't an EPSG code 
available then the projection will be set to the OpenLayers default of 
EPSG:4326.

Mike



Flipper wrote:
> Im trying my hand at some Open Layers programming. I'm trying to set the
maps
> Coordinate system to match Mapguides, So I decided to peek into Fusion....
> One thing for the life of me I can't find is where fusion sets the
OpenLayer
> Maps Coordinate system. I know Open layers uses Proj 4, and Mapguide Can
use
> both cs-map and Proj4...I know how to get the coordinate system
Description
> out of Mapguide...But how do I push it back into OpenLayers Using my
PROJCS
> system...
> Or worded Much simpler...How/Where does Fusion do this to openLayers...I
> want this to work on anymap...so I don't want to hard code a EPSG code
into
> it, and several users will have Non PROJ4 coordinate systems, like Local
> County Coordinate systems that CS-MAP allows them to use...
> ANYONE?
>   

-- 
   Michael Adair
   Senior Software Architect
   DM Solutions Group Inc.

   Office: (613) 565-5056 x26
   madair at dmsolutions.ca
   http://www.dmsolutions.ca
   http://research.dmsolutions.ca


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