[postgis-devel] [PostGIS] #1525: [raster] Redefine and expand the keywords available to MapAlgebra expressions

[PostGIS]

#1525: [raster] Redefine and expand the keywords available to MapAlgebra
expressions
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 Reporter:  dustymugs    |       Owner:  pracine      
     Type:  enhancement  |      Status:  new          
 Priority:  critical     |   Milestone:  PostGIS 2.0.0
Component:  raster       |     Version:  2.0.x        
 Keywords:               |  
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Comment(by pracine):

 I can think of applications using x and y since those are varying from one
 pixel to the other but since all the other values are constant from one
 pixel to the other one can easily use ST_MapAlgebraFct and pass those
 values as parameters to its custom function. This way we don't make 99% of
 the applications much slower.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1525#comment:7>
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