Propably because all the resulting values were greater than 15 and were clamped to 15. Use a better pixeltype (32BF).
Pierre > -----Original Message----- > From: postgis-users-boun...@postgis.refractions.net [mailto:postgis-users- > boun...@postgis.refractions.net] On Behalf Of Paolo Cavallini > Sent: Wednesday, May 30, 2012 6:42 AM > To: PostGIS Users Discussion > Subject: [postgis-users] ST_HillShade > > Not my lucky day. Why > > CREATE TABLE shade > as select rid, > ST_HillShade(rast,1,'4BUI',300,45,255,1) as rast > from dtm; > > returns a raster with all value=15? > > Thanks a lot. > -- > Paolo Cavallini - Faunalia > www.faunalia.eu > Full contact details at www.faunalia.eu/pc > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
