[mapserver-dev] Mapscript Raster Query Problem

Frank Warmerdam warmerdam at pobox.com
Thu Apr 8 18:36:23 EDT 2010


geographika wrote:
> Hi list,
> 
> I have some Python code running on MapScript which queries a raster 
> layer by an input point. The following lines:
> 
>     for i in range(layer.numitems):
>             print '%s: %s' % (layer.getItem(i), s.getValue(i))
> 
> With this I get the output below:
> 
> x: 249975
> y: 249975
> value_0: 3
> value_list: 3
> class: 50-100m
> red: 162
> green: 180
> blue: 189
> 
> But no matter which points I use the class and the rgb values remain the 
> same. However the value_0 and value_list are always correct. I have a 
> hack to get the correct class based on the value, but I'd appreciate any 
> further clarification on why the same values are always returned. The 
> raster displays without problems through MapServer showing the correct 
> classes for each pixel.
> Regards,

Seth,

If you can file a detailed ticket I am interested in investigating this
problem.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent



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