[postgis-users] PGRaster

[muhammad imran]

Hi John,

In the similar lines as oracle GeoRaster, Xing Lin developed a
raster model for PostGIS named PGRaster. Metadata is
stored as fields of PGRASTER METADATA type with spatial extent
(BBOX) and SRID. Raster value type refers to scale of measurement
that can be nominal, ordinal, interval or ratio. The model
coordinates have same unit as that of specified SRID. Actual image
data is stored in PGRASTER object type with blocks. Geotiff2pgraster
loader creates blocks, GIST index, and pyramid levels while
importing the image into database. Some basic SQL functions to
handle parameters of data model are provided; however, many
functions for image manipulation are under development. The source
code is distributed under the terms of GNU General Public Licence by
Refractions Research Inc; however, there is a debate over Xing Lin's
PGRaster source code and design regarding patent violation by
Oracle.
http://lists.refractions.net/pipermail/postgis-devel/attachments/20070711/b6dfd192/PGRASTER\_20070710-0001.pdf 
 
Regards,
 
--Imran



________________________________
From: John Zhang <johnzhang06 at gmail.com>
To: postgis-users at postgis.refractions.net
Sent: Saturday, November 22, 2008 3:22:31 AM
Subject: [postgis-users] PGRaster

Hi there,

Could anyone tell me about that? Is it implemented in postGIS 1.3? Having read some articles about GeoRatser from Oracle, I was wondering if PostGIS's PGRaster is there for us to use. Any input on it would be much appreciated.

Have a good weekend
John



      
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