[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
-------------------------+--------------------------------------------------
 Reporter:  dustymugs    |       Owner:  pracine      
     Type:  enhancement  |      Status:  new          
 Priority:  critical     |   Milestone:  PostGIS 2.0.0
Component:  raster       |     Version:  2.0.x        
 Keywords:               |  
-------------------------+--------------------------------------------------

Comment(by dustymugs):

 For the user function variants of MapAlgebra, we should try to maintain
 support for 3 and 4 parameter user functions.  3 parameter functions would
 preserve current implementations...

 userfunction(rast1value double precision, rast2value double precision,
 userargs text[])

 4 parameter functions would add a double precision array

 userfunction(rast1value double precision, rast2value double precision,
 userargs text[], rastattributes double precision[])

 The double precision array would have 16 elements, 8 elements for each
 raster.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1525#comment:4>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.