[Gdal-dev] DEM Files

[Frank Warmerdam]

Martin Chapman wrote:
> I am using gdal to load and display usgs ascii dem files with opengl on 
> windows.  When I load the file everything works fine but all the 
> elevation values are all -32000.  Has anyone ever had this problem 
> before?  I am basically using RasterIO to read line by line of the file 
> and then storing the values into a 2D array.
>

Martin,

I have encountered USGS DEM files that were mostly the -32000 background value,
but I think there should be *some* real values.  If you think the file is not
being read properly you could email it directly to me, and I will check it
out.

Best regards,

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