[mapguide-users] Fusion and Open layers Coordinate systems

[Jason Birch]

I don't think doing cs-map in js would be practical, but wkt parsing
in proj4js sure would be nice...

On 2009-10-07, Mike Adair <madair at dmsolutions.ca> wrote:
> It's a shame MapGuide doesn't use EPSG codes  :-)
>
> OpenLayers applications typically would use Proj4js to do client side
> transformations which is based on PROJ.4 which can use EPSG codes and/or
> custom initialization parameters.  I haven't heard of anyone converting
> CS-Map to Javascript.
>
> Mike
>
> Scott hameister wrote:
>> It's a shame OpenLayers doesn't use mentor/CS-Map...I thought I read
>> somewhere that it was going to? Anyone?
>>
>> -----Original Message-----
>> From: mapguide-users-bounces at lists.osgeo.org
>> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Jason Birch
>> Sent: Wednesday, October 07, 2009 11:28 AM
>> To: MapGuide Users Mail List
>> Subject: Re: [mapguide-users] Fusion and Open layers Coordinate systems
>>
>> 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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>>> mapguide-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>
>>>
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>
> --
>    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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