[postgis-devel] [PostGIS] #860: [raster] Modify ST_MapAlgebra to handle expressions and user-functions

PostGIS trac at osgeo.org
Mon Oct 3 07:18:40 PDT 2011

#860: [raster] Modify ST_MapAlgebra to handle expressions and user-functions
 Reporter:  dzwarg          |       Owner:  dzwarg       
     Type:  enhancement     |      Status:  assigned     
 Priority:  blocker         |   Milestone:  PostGIS 2.0.0
Component:  postgis raster  |     Version:  trunk        
 Keywords:                  |  

Comment(by dzwarg):

 Replying to [comment:8 pracine]:
 > If I remember well we have to move the pixeltype parameter to get the
 same parameter order of other MapAlgebra variants allowing to pass extra
 parameters to the user custom function. Right?

 Yes, that's correct. The order of the parameter has to change to bring
 pixeltype in front of the algebra expression, in addition to making
 pixeltype required.  It may still be NULL, but it is no longer an optional
 parameter. These changes are in r7625, so an update should get you the new
 versions. I've updated the documentation and all the tests, please let me
 know if I've missed anything.

Ticket URL: <http://trac.osgeo.org/postgis/ticket/860#comment:12>
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