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

[PostGIS]

#2557: [raster]: ST_MapAlgebra doco page needs lots of work
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 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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Comment(by dustymugs):

 Looking at that page, it does look like it could use some work.

 1. "position" is a keyword for PostgreSQL? I only find a string function
 by that name.

 2. I agree regarding the mixing of position[][] and position[] as that is
 confusing to the user but not PostgreSQL.

 3. Wow, I don't remember how I could have written that example as I do
 remember testing a query like that and copying it into the example (bad
 copy?). It looks like the "WITH foo" just needs to be replaced with ",
 foo".

 My guess (especially since I wrote that page) is that I never reviewed the
 page after I wrote it. The function does support ngb and non-ngb callbacks
 though...

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2557#comment:2>
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