[mapserver-users] Re: Showing nodata values as transparent in Tiff

[Dejan.Gambin at pula.hr]

Sorry, the nodata areas are transparent indeed, even without any parameter 
!

dejan

Dejan Gambin/GradPula wrote on 05.10.2008 00:06:23:

> Hi,
> 
> I have converted the ESRI ascii grid file to Geotiff and did 
> gdaladdo on it too. Thean, using gdalinfo I get:
> 
> Driver: GTiff/GeoTIFF
> Files: LDAY.tif
> Size is 3401, 2601
> Coordinate System is `'
> Origin = (6398997.500000000000000,5044002.500000000000000)
> Pixel Size = (5.000000000000000,-5.000000000000000)
> Corner Coordinates:
> Upper Left  ( 6398997.500, 5044002.500)
> Lower Left  ( 6398997.500, 5030997.500)
> Upper Right ( 6416002.500, 5044002.500)
> Lower Right ( 6416002.500, 5030997.500)
> Center      ( 6407500.000, 5037500.000)
> Band 1 Block=3401x1 Type=Float32, ColorInterp=Gray
>   NoData Value=-999
>   Overviews: 1701x1301, 851x651, 426x326, 213x163
> 
> So the nodata value is -999. I have tried making this nodata area 
> transparent using:
> 
> PROCESSING "NODATA=-999" but it doesn't work. Am I doing something 
> wrong? Can I do it with OFFSITE parameter?
> 
> thanks very much
> 
> regards, dejan
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