Hi George, Unfortunalely st_setvalue is not yet implemented. You could have created an empty raster (st_makeemptyraster) and set the pixels values with st_setvalue.
The only way to create a raster and set specific pixels value now is to generate the HEX values representing the raster and to cast them to ::raster. You will find the best example of this in regress/ create_rt_band_properties_test.sql in the source tree. Pierre From: [email protected] [mailto:[email protected]] On Behalf Of George Silva Sent: 21 juillet 2010 09:59 To: PostGIS Users Discussion Subject: [postgis-users] How to Construct a raster in pl/pgsql function? Hello guys, I'm trying to write a function to calculate flow direction using SQL, in moving windows of 9x9 pixel size. How can I write a output raster? What is the way to create a specific raster? George -- George R. C. Silva Desenvolvimento em GIS http://blog.geoprocessamento.net
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