[GRASS-user] Error exporting to tiff

[Andrea Peri]

Hi,
I resolve the error.
The original raster to convert was in 16bit value, and before to do
the r.gdal.out is need to rescale to 8 bit.

I wrongly uess the setting BYTE in r.gdal.out was to convert from 16bitto 8 bit.
Instead no, is necessary a convertion using rescale before.

Thx to point me in right direction.

A.


2015-07-02 8:42 GMT+02:00 Andrea Peri <aperi2007 at gmail.com>:
> I create it from new retrieving the settings from the original geotiff I load.
>
> Actually the region settings are this:
>
> g.region -p
> projection: 1 (UTM)
> zone:       32
> datum:      wgs84
> ellipsoid:  wgs84
> north:      5058915
> south:      4825185
> west:       587685
> east:       817515
> nsres:      30
> ewres:      30
> rows:       7791
> cols:       7661
> cells:      59686851
>
> Thx,
>
>
> 2015-07-02 2:24 GMT+02:00 Anna Petrášová <kratochanna at gmail.com>:
>>
>>
>> On Wed, Jul 1, 2015 at 8:11 PM, Andrea Peri <aperi2007 at gmail.com> wrote:
>>>
>>> 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.
>>
>>
>> What is your region setting?
>>>
>>>
>>> Many thx for any help.
>>>
>>> Thx,
>>>
>>> --
>>> -----------------
>>> Andrea Peri
>>> . . . . . . . . .
>>> qwerty àèìòù
>>> -----------------
>>> _______________________________________________
>>> grass-user mailing list
>>> grass-user at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>
>>
>
>
>
> --
> -----------------
> Andrea Peri
> . . . . . . . . .
> qwerty àèìòù
> -----------------



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Andrea Peri
. . . . . . . . .
qwerty àèìòù
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