[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:  reopened     
  Priority:  medium          |   Milestone:  PostGIS 2.0.0
 Component:  postgis raster  |     Version:  trunk        
Resolution:                  |    Keywords:               
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Changes (by jorgearevalo):

  * status:  closed => reopened
  * resolution:  fixed =>


Comment:

 Anyway, I think the isnodata flag must be set to true in these 2
 cases:[[BR]]
 - Calling ST_SetBandNoDataValue with TRUE as last argument[[BR]]
 - Calling ST_SetPixelValue with TRUE as last argument[[BR]]

 Optionally, to simply "clean" the flag without changing any other band
 value, we may want, as you said, a ST_SetBandIsNodata function.

 So, we can update the raster at database by calling one of that 3
 functions over each raster object.

 Agree?

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/593#comment:20>
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