[OpenLayers-Users] How to test if a point is within WMS layer?

[Greg Allensworth]

> I thought I could use WFS to get all the features of the polygon layer then
> use OpenLayers.Format.GML.parseGeometry.multipolygon to turn it into a
> polygon object in OL. Then I could use
> OpenLayers.Geometry.Polygon.containsPoint to test if the point is within the
> polygon. First Question: is this logic sound?

Yes, it is sound and also easy to implement. But you may have an issue 
if it's more than a few thousand vertices. You may hang the browser 
simply parsing the GML.

The server-side method you are already attempting, sounds like your best 
bet. I'm sorry I have no help for you on the hanging problem.

-- 
Greg Allensworth, Web GIS Developer
BS  A+  Network+  Security+  Linux+  Server+
GreenInfo Network - Information and Mapping in the Public Interest
564 Market Street, Suite 510  San Francisco CA 94104
PH: 415-979-0343 x302  FX: 415-979-0371    email: gregor at greeninfo.org
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