[postgis-tickets] [PostGIS] #2557: [raster]: ST_MapAlgebra doco page needs lots of work

[PostGIS]

#2557: [raster]: ST_MapAlgebra doco page needs lots of work
---------------------------+------------------------------------------------
 Reporter:  robe           |       Owner:  robe         
     Type:  defect         |      Status:  new          
 Priority:  medium         |   Milestone:  PostGIS 2.1.2
Component:  documentation  |     Version:  2.1.x        
 Keywords:                 |  
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 In reading thru:

 http://postgis.net/docs/manual-dev/RT_ST_MapAlgebra.html

 The page is very inconsistent.

 1) It presents a callbackfunction example which uses the keyword position
 (unquoted).

 2) The callbackfunction says the position should be 2-dimensions
 position integer[][]

 but then later it says

 position integer[]

 3) The last example of Variant 1 is borken - has an invalid CTE and
 probalby invalid other things as well like use of a non-existent call back
 function that doesn't even agree with the definition of what the call back
 function is described to contain.

 My guess is this page wasn't fully done to confirm to whent eh regproc
 signature changed to support both ngb and non-ngb map algebra callback
 functions

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2557>
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