[postgis-tickets] [PostGIS] #2163: [raster] Add st_tpi

[PostGIS]

#2163: [raster] Add st_tpi
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 Reporter:  nclay   |       Owner:  dustymugs    
     Type:  patch   |      Status:  new          
 Priority:  medium  |   Milestone:  PostGIS 2.1.0
Component:  raster  |     Version:  trunk        
 Keywords:          |  
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Comment(by dustymugs):

 Yes.  You may want to consider regression tests that focus only upon the
 callback function.  Take a look at rt_4ma.sql and rt_invdistweight4ma.sql
 in raster/test/regress.  The idea is to test just the code that needs
 testing rather than the whole map algebra framework, which is tested
 elsewhere.  This way any failures can only originate in the callback
 function.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2163#comment:10>
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