hello Using postgis-raster,I want to get raster values bigger than 20.
I tried : SELECT ST_AsBinary((ST_DumpAsPolygons(rast)).geom), (ST_DumpAsPolygons(rast)).val FROM (select ST_MapAlgebraExpr(rast,1,'CASE WHEN [rast] > 20 THEN 1 ELSE 0 END','0') from slp5 ) as rast; It is wrong I will appreciate if you give me a hint regards -- Ahmet Temiz Jeoloji Müh. Afet ve Acil Durum Yönetimi Başkanlığı Planlama ve Zarar Azaltma Dairesi Başkanlığı ________________________ Ahmet Temiz Geological Eng. Information Systems - GIS Group Disaster and Emergency Management of Presidency
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