How can I query/identify the pixel/cell value of a raster at the location of
mouse click? I've searched online and have found vague older references to
a pmapper_demo_dev.map and a "corine" layer (which apparently doesn't exist
anymore) that demonstrates how to use metadata tags for use with rasters to
query/identify. I think I've figured out the METADATA tags that I should
use, But nothing I've tried yet returns the pixel value of the raster.
Mapserver renders this raster layer without any problem. How do I
identify/query the pixel cell value?
I'm using p.mapper 4.1.1 and php_mapscript 5.6.
The layer snippet from my mapfile is below.
Many thanks. Matt
LAYER
NAME "ppt"
GROUP "ppt"
DATA "precipitation_data.bil"
PROJECTION
"proj=latlong"
END
STATUS ON
TYPE RASTER
UNITS METERS
TEMPLATE void
TOLERANCEUNITS pixels
TOLERANCE 0
METADATA
"DESCRIPTION" "Rainfall data"
"RESULT_HEADERS" "xcoord,ycoord"
"RESULT_FIELDS" "x,y"
END
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