Hello Pierre, That will do just fine.
Thanks for your help. George On Wed, Jul 21, 2010 at 12:42 PM, Pierre Racine <[email protected] > wrote: > 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 > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > > -- George R. C. Silva Desenvolvimento em GIS http://blog.geoprocessamento.net
_______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
