[postgis-users] General Question on Raster within PostGIS

Paul Ramsey pramsey at refractions.net
Thu May 9 17:26:36 PDT 2002


In addition to the BYTEA storage option (which isn't bad), there is the
'chip' data type. We have not done any image storage in chip thus far,
we are concentrating our work on DEM storage. Right now we are keeping
all the non-PostGIS code for that inside the company, as we have some
commercialization aspirations. 

However the core chip type is available for use, and should be tractable
for image storage. A BYTEA solution would probably be easier in the
short run though. The main advantage of new internal types is you can
define functions on them cleanly. If most of the processing (mosaicing,
resampling, whatever) is being done by client programs the special type
advantage kind of disappears.

I was sort of hoping the OSSIM folks would pick up the PostGIS chip type
as a means of storing some of their data, myself.

P.

-- 
      __
     /
     | Paul Ramsey
     | Refractions Research
     | Email: pramsey at refractions.net
     | Phone: (250) 885-0632
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