[postgis-users] ST_Slope

[JamesH]

Hi Stephen,

Thanks, I have been attempting to use this query:
SELECT 
	ST_Slope(ST_MapAlgebraExpr(ST_AddBand(ST_MakeEmptyRaster(10, 10, 0, 0, 0.1,
0.1, 0, 0, 4269), '8BUI'::text, 1, 0), '32BUI', '([rast.x] - 1) * 10 +
[rast.y]') 
, 1, '8BUI')
FROM
	nclheights;

I have included the ::text cast which now returns an error of "function
st_slope(raster, integer, text) does not exist, No function matches the
given name and argument types".

Trying to produce a slope surface from a 1 band raster - unsuccessfully.

Regards,
James

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