[postgis-devel] [GRASS-dev] GRASS created geotiff do not properly load into PostGIS (raster2pgsql)

[Rémi Cura]

Hey,
what is your version of gdal (type `gdalinfo --version`)
Cheers,
Rémi-C


2014-05-16 11:14 GMT+02:00 Blumentrath, Stefan <Stefan.Blumentrath at nina.no>:

>  Hi,
>
>
>
> And sorry for posting on two lists. Just don`t know where the issue
> belongs to…
>
>
> I tried to load a set of raster maps in Geotiff format, which I created in
> GRASS using r.external.out, into PostGIS 2.1.2dev.
>
>
>
> In PostGIS the raster datasets only contain NoData values, while gdalinfo
> –stats produces reasonable statistics for the respective GeoTiffs.
>
>
>
> I did some trouble shooting and found that the problem was that GRASS did
> not assign a numerical NoData value to the GeoTiff, but “nan”.
>
>
>
> When I gdal_translate same GeoTiff with –a_nodata -9999, raster2pgsql
> loads the resulting file just fine.
>
>
>
> Is raster2pgsql supposed to read rasters with nan as NoData values (using
> –N -9999 in raster2pgsql had no effect btw.) or should GRASS
> (r.external.out) assign a NoData value to the produced raster datasets?
>
>
>
> Many thanks in advance,
>
> Stefan
>
>
>
>
>
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