[OpenLayers-Users] geosjon format with epsg other than 4326

[Julien-Samuel Lacroix]

Hi,

Others may be able to give you more info on this one, but...

If I recall correctly there was a long discussion on the GeoJSON 
mailing-list [1] on the usability of this CRS tag. I think that the 
conclusion was to remove it from GeoJSON, other may correct me if I'm 
wrong. So don't plan on it. Are you in control of this data and service? 
maybe it could return you a WFS. Or maybe a GetCapabilities to the data 
server would tell you the projection before you receive the GeoJSON.

This is a tricky one, I agree.


[1] 
http://lists.geojson.org/pipermail/geojson-geojson.org/2013-May/thread.html

Julien


On 13-10-11 11:09 AM, Steve.Toutant at inspq.qc.ca wrote:
> Hi,
>
> Sometimes I receive geojson from a wps service in different projection
> than 4326. I manage it like this for example
> geojson_format = new OpenLayers.Format.GeoJSON({'internalProjection':
> map.getProjectionObject(),'externalProjection': new
> OpenLayers.Projection("EPSG:32198")});
>
> It works but 32198 is hardcoded, and I don't know when the epsg will be
> different.
>
> I read that if different than 4326, the geojson should have a crs tag as
> defined here
> http://geojson.org/geojson-spec.html#named-crs
>
> Someone has defined a new OpenLayers.Format.GeoJSON that can read this
> tag and set the externalProjection code?
>
> thanks
> steve
>
>
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-- 
Julien-Samuel Lacroix
Mapgears
http://www.mapgears.com/