[gdal-dev] gdal_rasterize failing when trying multiband

[Nunez, Mario]

Thank you for your help,

I know that is a possibility but this is to process big amounts of data and I would like to avoid the merge processing time if possible by rasterizing over the same tif...


I would like to know if it is possible...


cheers,

Mario

________________________________
De: Even Rouault <even.rouault at spatialys.com>
Enviado: jueves, 7 de junio de 2018 13:05:03
Para: gdal-dev at lists.osgeo.org
Cc: Nunez, Mario
Asunto: Re: [gdal-dev] gdal_rasterize failing when trying multiband

Mario,

I suggest you use gdal_rasterize to produce as many GeoTIFF files as you have
'burning sessions'
And then use gdal_merge.py -separate to make a single GeoTIFF from all the
above ones.

Even

> Hello,
>
> I was doing some point rasterization of vector data from postgis database by
> using gdal_rasterize from a bash script, the command looks like this:
>
>
> gdal_rasterize -a value -b $COUNT -tr $RESOLUTION -te $BBOX -a_nodata
> $NODATA -a_srs $EPSG PG:'host=localhost dbname=databio user=postgres
> password=postgres' -sql "SELECT ST_Centroid(g.geom), AVG($COLUMN) as value
> FROM $GRID g, $OBSERVACION o WHERE utc_date='$DATE' AND
> vessel_cfr='$VESSEL' AND ST_Intersects(o.geom,g.geom) IS TRUE GROUP BY
> g.gid" ./bands/$DATE2"_"$COLUMN".tif"
>
>
> The problem is that I want to generate a geotif file with multiple bands, so
> if I remove the -b $COUNT parameter and value it works and I get a .tif
> file with the -a value printed on it for band1, but the idea is to reuse
> that command in a for loop to add further bands and I am gettin this error:
>
>
> -b option cannot be used when creating a GDAL dataset.
>
> I tried to run the comand once to create the tif file without the -b option
> and then run it additional times with the -b option when the tif is already
> created but it makes no difference.
>
>
> I am stucked with this and I am starting to think that -b option can only be
> used with -burn parmeter and as far as I know -burn is only for constant
> values...
>
>
> thank you in advance for any help.
>
> cheers,
>
> Mario
>
>
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