[Gdal-dev] StarSpan Progress, and quick question on OGR data sources

Dylan Beaudette dylan.beaudette at gmail.com
Thu Nov 2 14:43:19 EST 2006

Hi guys,

I was recently working on a project involving vector data stored in a PostGIS 
table, and raster data stored in GRASS - using starspan to perform the 
analysis. I noticed a (bug?) in starspan, where the --vector argument will 
only accept a single parameter. This becomes a problem when specifying an OGR 
PostGIS connection.

For example:
ogrinfo PG:"dbname=pinn  host=localhost" table_name

would return all the gory details from the spatial table 'table_name'  from 
the database 'pinn' .

note that there are two parameters on the command line: a DSN and the table 
(or in OGR terms, a layer).

In starspan it is not possible to pass in 2 items to the --vector argument.

I posted this question on the IRC channel yesterday, and was away from the 
computer when Frank responded. 

It sounds like there is no way to specify a 'table' in the PG datasource 
description line. Searching google, it sounds like there is some way to 
specify a 'schema' - but it is not clear how or if this would allow one to 
specify a specific table in a PostGIS data source. 

Therefore, I wonder if there is a simple modification to the starspan code 
which would allow for PG data sources to specify a table.

Note that starspan can correctly extract PG vector data, when there is only 1 
spatial table in the DB.

Any thoughts? 

PS: I think that the abilities of starspan really shine here: extracting data 
from postgis and GRASS, two drastically different data sources -- all though 
the magic which is GDAL. Good work everyone!

Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis

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