Hello List,
This question may be a general newbie GIS question and not solely
related to Mapserver, so apologies if I'm posting to the wrong place.
I am serving a GeoTiff via Mapserver using WMS, and displaying it
using OpenLayers, so far so good.
I need to be able to click on a point on the map and display the
value held within that particular Raster cell.
Can anyone suggest what mechanism I should use for this? WCS looks
like it might be the thing I need, but I'm having difficulty finding
much in the way of examples and instructions.
I've followed what examples there are and all I can get Mapserver to
return using WCS, is a Geotiff with every pixel set to zero.
So I've obviously not got it working correctly, and even if it were
I'm not sure how to get the information I need out of the returned
Geotiff when my client is OpenLayers.
Can anyone suggest a way to access a raster's values when it is
served by Mapserver and viewed using OpenLayers?
Thank you
Andrew Mason
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