[postgis-devel] [PostGIS] #1245: ST_AddMultiBand that can add multiple bands to an existing raster

PostGIS trac at osgeo.org
Mon Oct 17 07:54:57 PDT 2011

#1245: ST_AddMultiBand that can add multiple bands to an existing raster
 Reporter:  robe         |       Owner:  pramsey              
     Type:  enhancement  |      Status:  new                  
 Priority:  medium       |   Milestone:  PostGIS Raster Future
Component:  postgis      |     Version:  trunk                
 Keywords:               |  
 It's been bugging me for a while that a lot of code we have for adding
 multiple bands to a raster looks like this:

 ST_AddBand(ST_AddBand(ST_MakeEmptyRaster(100,100,0,0,1,-1,0,0, -1),
 '1BB'), '4BUI') ;

 There are two issues I see with this calling of multiple ST_AddBand
 1) Each call I can only assume requires a memcopy of the previous raster
 which would be avoided if you can pass all the bands in a single call.

 2) It's kinda long to type

 Overloading the ST_AddBand I think will get problematic with casting of
 arrays etc.

 But perhaps an ST_AddMultiBand or something like that

 Which will
 1) Have a proto to allow you to add a range of bands from one raster to

 kind of like ST_Band().. so I could do something like

 ST_AddMultiBand(newrast, ST_Band(oldrast,ARRAY[1,4]) )


 ST_AddMultiBand(newrast, ARRAY['8BUI', '8BUI'])


Ticket URL: <http://trac.osgeo.org/postgis/ticket/1245>
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