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

[PostGIS]

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

 Can I get some reference material describing TPI and TRI?  That way
 appropriate regression tests can be created.  I can't really consider
 committing this without a good understanding of the operations and
 verifying that the code is doing what it is saying it is doing.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2163#comment:2>
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