Hi I am using the ST_Reclass to create 3-band TIFF (for graphical presentation) from 1 band grid 32BF (using algorithm described in 32BF http://postgis.refractions.net/documentation/manual-svn/RT_ST_Reclass.ht ml) The problem is, then for the mapping both intervals in (reclassexpr text) must be increasing - values from small to high is mapped to colors from "small to high" = (black to white for example) - and I like to have them in opposite order. I am working with the big rasters (2000 x 2000 cells). In this case the ST_Reclass is already not very fast - and when I try to use map algebra it was very, very slow. Did someone have idea how to speed up? Thank you Standa
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