[postgis-devel] [PostGIS] #1319: [raster] Make raster_columns a view and AddRasterColumn enforce more
PostGIS
trac at osgeo.org
Wed Nov 23 12:06:02 PST 2011
#1319: [raster] Make raster_columns a view and AddRasterColumn enforce more
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Reporter: robe | Owner: robe
Type: task | Status: new
Priority: high | Milestone: PostGIS 2.0.0
Component: postgis raster | Version: trunk
Keywords: |
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Comment(by dustymugs):
Replying to [comment:10 pracine]:
> Replying to [comment:8 dustymugs]:
> > Added scalex and scaley. Will need to write a lower-level function to
get the band pixtypes of a raster quickly.
>
> I'm afraid there is no way to do that quick. Maybe for the first band
but not for the other bands. Remember when you wrote deserialize_header...
Would that mean that everything has to be deserialized to determine all
the pixeltypes and the nodata values of all the bands of all the tables?
Scary...
Actually, I'm playing with a new function to see if I can selectively
slice a band's metadata (and data if desired) without deserializing the
entire raster. I'll see what the performance is like when I'm done.
--
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1319#comment:12>
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