I suppose I am a bit late, but you may find
http://docs.openlayers.org/library/spherical_mercator.html useful in
figuring out how OpenLayers fits Google Maps and WMS tiles together.
--
David Winslow
OpenGeo - http://opengeo.org/
On Thu, Dec 30, 2010 at 2:33 PM, Dan Lyke <[email protected]> wrote:
> On Mon, 27 Dec 2010 21:27:10 -0800
> Dan Lyke <[email protected]> wrote:
> > I have a bunch of shape files[1] that appear to be in EPSG:2226[2].
> > I'm defining a new layer in GeoServer, under "Coordinate Reference
> > Systems" the "Native SRS" appears as "UNKNOWN" (but see footnote[2]
> > below), I put "EPSG:2226" in "Declared SRS". I have also tried to
> > import this data into PostGIS telling shp2pgsql that it's in 2226.
>
> Answering my own question, I've got it working now, and I think the
> magic sauce was to tell my OpenLayers the expected projection:
>
> var options = {
> projection: new OpenLayers.Projection("EPSG:900913"),
> displayProjection: new OpenLayers.Projection("EPSG:4326"),
> units: "m",
> numZoomLevels: 20,
> maxResolution: 156543.0339,
> maxExtent: new OpenLayers.Bounds(-20037508, -20037508,
> 20037508, 20037508.34)
> };
>
> map = new OpenLayers.Map('map', options);
>
> I haven't run this to ground, but my speculation is that WMS asks for
> the projection, and barring that GeoServer offers it up in the default
> for the layer.
>
> Dan
>
>
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