[postgis-devel] [PostGIS] #593: [raster] Add a ST_BandIsNoData function

[PostGIS]

#593: [raster] Add a ST_BandIsNoData function
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  Reporter:  pracine         |       Owner:  jorgearevalo 
      Type:  task            |      Status:  closed       
  Priority:  medium          |   Milestone:  PostGIS 2.0.0
 Component:  postgis raster  |     Version:  trunk        
Resolution:  fixed           |    Keywords:               
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Comment(by jorgearevalo):

 Fully agree Pierre. The modifications made in loader scripts don't really
 work. I mixed the idea I was going to implement a function to set the flag
 and modify the raster at db with the existence of the st_bandisnodata
 function, that actually doesn't modify the raster at all. Stupid mistake,
 sorry. Too many things on my mind. I'm going to delete it from the loader
 (and change documentation)

 We have a basic ST_BandIsNodata function that checks the flag. Enough, by
 now, to MapAlgebra implementation. I'll finish it before optimizing this
 function, just as you've said.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/593#comment:19>
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