[mapguide-users] Fusion and Open layers Coordinate systems

[Jason Birch]

I know this is neither here nor there, but I believe there are many
valid projections that do not have EPSG codes. Defaulting to LL when
many "non-standard" CS are liner-units-based may not be the best
approach. Would it not be possible to disable coordinate transforms if
there is no code available?

Jason

On 2009-10-07, Mike Adair <madair at dmsolutions.ca> wrote:
> 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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