[OpenLayers-Dev] Get individual pixel values of wms-grid raster layers?

[Ivan Grcic]

Hi, issuing getfeatureinfo on raster layer in geoserver returns pixel
value of clicked point. Dont know if that is standard or not though...
cheers

On Sun, Jan 31, 2010 at 11:45 AM, Mårten Karlberg
<mortkarlberg at gmail.com> wrote:
> Hello!
>
> Is it possible to access pixel values of wms-grid raster layers in
> OpenLayers? What I want to do is to extract pixel values from a raster layer
> where it intersect with a vector overlay.
> I've tried figuring out the grid tile raster structure through the DOM tree,
> but just don't get it.
> Is this possible? If I understand HTML5 right something like this could be
> achieved through the Canvas element (see e.g. http://www.pixastic.com/lib/),
> but can it be done now, in present versions of OpenLayers?
>
> (Sorry if this topic has been discussed before, but the mailing list search
> engine only return error 500).
>
> Thanks in advance!
>
> /Mort Karlberg, Sweden
>
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-- 
Ivan Grcic