[postgis-users] MapAlgebra on three Rasters

[JamesH]

Currently, I am using:
CREATE TABLE map2 AS(
SELECT
	ST_MapAlgebraExpr(ST_MapAlgebraExpr(a.rast,1, '32BF',
'((67.6499557495117-[rast])/67.6499557495117)'), 1,
ST_MapAlgebraExpr(b.rast,1, '32BF',
'((14052.134765265-[rast])/14052.134765265)'), 1, '([rast1] * 0.5) +
([rast2] * 0.3)::float', '32BF').*
FROM
	density a, euclidean b
	);

But its not exporting correctly, and using .* returns as a syntax error. 
Can anyone show me where I'm going wrong with this?

Much Appreciated,
James

-----
GIS Undergraduate
--
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