[OpenLayers-Users] wfs, state plane, and spherical mercator
Christopher Schmidt
crschmidt at metacarta.com
Mon Apr 6 17:05:49 EDT 2009
On Mon, Apr 06, 2009 at 02:56:42PM -0600, David Hollema wrote:
> Next question. I want to recenter the map based on a feature created
> from a separate WFS request. I use OL.Format.GML and the read method
> to create a new feature from the responseXML. When I look at the
> geometry of the point feature, the x,y cords are in the native
> coordinates. I tried point.transform("EPSG:2231","EPSG:900913") but the
> transformation never works properly. All the examples I see go from
> 4326 to 900913. My data are in State Plane. I would expect that the
> underlying transformation library could handle this transformation but
> maybe not?
1. The GML layer supports reprojection as a layer option, just specify
the projection:
Layer.GML("", "", {projection: new
OpenLayers.Projection("EPSG:2231")});
2. In order to use anything other than 900913 and 4326, yu'll need
to include proj4js support (seperately from OpenLayers).
http://proj4js.org / http://trac.osgeo.org/proj4js/ may help you here.
-- Chris
>
>
> Thanks,
>
>
>
> Dave
>
>
>
> David A. Hollema
>
> GIS Analyst
>
>
>
> United Power, Inc.
>
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--
Christopher Schmidt
MetaCarta
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