Pierre, The pixel type isn't 'Integer'. The list of valid pixel types are:
1BB - 1-bit boolean 2BUI - 2-bit unsigned integer 4BUI - 4-bit unsigned integer 8BSI - 8-bit signed integer 8BUI - 8-bit unsigned integer 16BSI - 16-bit signed integer 16BUI - 16-bit unsigned integer 32BSI - 32-bit signed integer 32BUI - 32-bit unsigned integer 32BF - 32-bit float 64BF - 64-bit float So, you'd call ST_Slope() with something like. SELECT ST_Slope(rast, 1, '32BUI') from Raster1; -bborie On 10/18/2012 12:14 PM, Pierre LACROIX wrote: > Hi, > > I would like to generate the slope from a DEM. > The DEM is called Raster1. It has one band and holds integer values. >>From the the SQL Editor (in the PG Admin) the following command displays > values but does not generate an output slope raster: > > SELECT ST_Slope(rast, 1,'Integer') from Raster1; > > What is the syntax to generate the slope raster? > > Thanks in advance. > > Pierre > > > > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users > -- Bborie Park Programmer Center for Vectorborne Diseases UC Davis 530-752-8380 bkp...@ucdavis.edu _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users