[postgis-tickets] [PostGIS] #2341: [raster] ST_MapAlgebra mask parameter

[PostGIS]

#2341: [raster] ST_MapAlgebra  mask parameter
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 Reporter:  nclay        |       Owner:  dustymugs    
     Type:  enhancement  |      Status:  new          
 Priority:  medium       |   Milestone:  PostGIS 2.2.0
Component:  raster       |     Version:  trunk        
 Keywords:               |  
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Comment(by dustymugs):

 You will need an array for mask NODATA.

 In your code snippet, if mask is of type double, don't ever evaluate
 like...

 {{{
 mask[_y][_x] == 0
 }}}

 Instead use...

 {{{
 FLT_EQ(mask[_y][_x], 0)
 }}

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2341#comment:12>
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