Hello, When I run the following query select ST_MapAlgebra(r1.rast, r2.rast, "rast1 + rast2") from (select r1.rast, r2.rast from r1, r2) as foo limit 10;
I get this error ERROR: column "rast + rast" does not exist LINE 1: ...t * from (select ST_MapAlgebra(r1.rast, r2.rast, "rast + ra... ^ What could be the problem? What is the correct syntax for st_mapalgebra? I have PostGIS installed the version updated on 18th Nov 2011. Joan
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