File a ticket. Besides the count, all the other fields should be NULL. -bborie
On 06/16/2012 08:55 PM, Pierre Racine wrote: > Hi, > > Seems to me that when computing summary stats on a null raster (having only > nodata values and the count of significant pixel is 0), then the sum, the > mean, the stddev, the min and the max should be null. However this: > > SELECT ST_SummaryStats(ST_AddBand(ST_MakeEmptyRaster(10, 10, 0, 0, 1, 1, 0, > 0, 4326), '16BSI'::text, 0, 0)); > > returns that: > > "(0,0,0,-1,0,0)" > > Confusing... If zero pixel were taken into account in the stats, then there > should be no results for the other metrics. If I fetch only the min, the max, > or the average, how do I know there are actually not significant? > > 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
