</programlisting>
<para>Create a new 1 band raster of pixel-type 2BUI from our original that is reclassified.</para>
<programlisting>ALTER TABLE dummy_rast ADD COLUMN map_rast2 raster;
-UPDATE dummy_rast SET map_rast2 = ST_MapAlgebra(rast,'CASE WHEN rast
- BETWEEN 100 and 250 THEN 1 WHEN rast = 252 THEN 2 WHEN rast BETWEEN 253 and 254 THEN 3 ELSE 0 END', '2BUI') WHERE rid = 2;
+UPDATE dummy_rast SET map_rast2 = ST_MapAlgebra(rast,'CASE WHEN rast BETWEEN 100 and 250 THEN 1
+WHEN rast = 252 THEN 2
+WHEN rast BETWEEN 253 and 254 THEN 3 ELSE 0 END', '2BUI') WHERE rid = 2;
SELECT DISTINCT ST_Value(rast,1,i,j) As origval, ST_Value(map_rast2, 1, i, j) As mapval
FROM dummy_rast CROSS JOIN generate_series(1, 5) AS i CROSS JOIN generate_series(1,5) AS j