[GRASS-user] Error exporting to tiff

[Andrea Peri]

Hi,

I'm try-ing to export a tiff raster using this couple of commands:

r.composite -c --overwrite red=refl4.hpf at PERMANENT
green=refl3.hpf at PERMANENT blue=refl2.hpf at PERMANENT levels=256
output=hpf

r.out.gdal -c input=hpf at PERMANENT output=/path-to/hpf.tif
format="GTiff" type="Byte"
createopt="INTERLEAVE=PIXEL,TFW=YES,PROFILE=BASELINE,COMPRESS=DEFLATE"

But I have an error:

Checking GDAL data type and nodata value...
2..5..8..11..14..17..20..23..26..29..32..35..38..41..44..47..50..53..56..59..62..65..68..71..74..77..80..83..86..89..92..95..98..100
WARNING: Selected GDAL datatype does not cover data range.
WARNING: GDAL datatype: Byte, range: 0 - 255
WARNING: Raster map <hpf at PERMANENT> range: 0 - 1.67114e+07
WARNING: Raster export results in data loss.
Using GDAL data type <Byte>
Input raster map contains cells with NULL-value (no-data). The value
255 will be used to represent no-data values in the input map. You can
specify a nodata value with the nodata option.
ERROR: Raster export aborted.

The message is absolutely not clear about what is the problem.

I don't know if there some log where retrieve more information.

Many thx for any help.

Thx,

-- 
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Andrea Peri
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qwerty àèìòù
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