[Gdal-dev] GTOPO30 and max value

[Frank Warmerdam]

Markus Neteler wrote:
> Frank, 
> 
> it looks like this:
> 
> cat W100N40.HDR
> BYTEORDER      M
> LAYOUT       BIL
> NROWS         6000
> NCOLS         4800
> NBANDS        1
> NBITS         16
> BANDROWBYTES         9600
> TOTALROWBYTES        9600
> BANDGAPBYTES         0
> NODATA        -9999
> ULXMAP        -99.99583333333334
> ULYMAP        39.99583333333333
> XDIM          0.00833333333333
> YDIM          0.00833333333333

Markus,

You can add the "PIXELTYPE SIGNEDINT" line in the .hdr to force
interpretation of the file as signed rather than unsigned integers.

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    | President OSGeo, http://osgeo.org