Hi, May be you can use gdal_dem with PostGis Raster reader (mode 2) if you want create derived product from DEM? http://www.gdal.org/gdaldem.html
It is working very well with gdal 1.8. Moreover you can extrapolate values along the borders of the tiles. If you just want merging adjacent rasters you can use gdal_translate with PostGis Raster reader (mode 2). David > Date: Fri, 25 May 2012 19:08:23 +0200 > From: cavall...@faunalia.it > To: postgis-users@postgis.refractions.net > Subject: Re: [postgis-users] ST_Aspect artifacts? > > Il 25/05/2012 19:02, Pierre Racine ha scritto: > > Yeah. ST_Union is good for unioning overlapping rasters (e.g. computing the > > mean of a temperature series) but not for merging adjacent rasters. We will > > have to write something else for that. > > > ok. again, thanks for clarifying. > all the best. > > -- > Paolo Cavallini > See: http://www.faunalia.it/pc > > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users
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