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Loading data with ogr2ogr
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Loading data with ogr2ogr
by Pål Kristensen
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Hi!
I have loaded some data from ArcSDE 9.1 to PostGIS using the ogr2ogr utility. The load statements typically looks like this: ogr2ogr -nlt LINESTRING -nln n50_begrensningskurve -lco GEOMETRY_NAME=the_geom -a_srs EPSG:32633 -f PostgreSQL PG:"dbname=kartdata user=**** host=***.***.***.***" SDE:***.***.***.***,5157,,sde_user,sde_password,n50.begrensningskurve The problem is that the resulting table in PostGIS has a SRID value of 1, but it should be 32633. I have tried to include the s_srs option to override the source projection, which by the way is 32633, but that did not do any difference. I have used the UpdateGeometrySRID function to change the SRID after loading, but that seems like a workaround that really not should be necessary. Is there something I've missed that causes this behavior? Any ideas? Regards, Pål Kristensen |
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RE: Loading data with ogr2ogr
by Obe, Regina DND\MIS
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Not sure if it makes a difference, but I usually quote the "EPSG:32633", but I've never imported from SDE so could be a totally different issue.
Hope that helps, Regina -----Original Message----- From: postgis-users-bounces@... [mailto:postgis-users-bounces@...] On Behalf Of Pål Kristensen Sent: Thursday, December 13, 2007 6:17 AM To: postgis-users@... Subject: [postgis-users] Loading data with ogr2ogr Hi! I have loaded some data from ArcSDE 9.1 to PostGIS using the ogr2ogr utility. The load statements typically looks like this: ogr2ogr -nlt LINESTRING -nln n50_begrensningskurve -lco GEOMETRY_NAME=the_geom -a_srs EPSG:32633 -f PostgreSQL PG:"dbname=kartdata user=**** host=***.***.***.***" SDE:***.***.***.***,5157,,sde_user,sde_password,n50.begrensningskurve The problem is that the resulting table in PostGIS has a SRID value of 1, but it should be 32633. I have tried to include the s_srs option to override the source projection, which by the way is 32633, but that did not do any difference. I have used the UpdateGeometrySRID function to change the SRID after loading, but that seems like a workaround that really not should be necessary. Is there something I've missed that causes this behavior? Any ideas? Regards, Pål Kristensen -- View this message in context: http://www.nabble.com/Loading-data-with-ogr2ogr-tp14313629p14313629.html Sent from the PostGIS - User mailing list archive at Nabble.com. _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users ----------------------------------------- The substance of this message, including any attachments, may be confidential, legally privileged and/or exempt from disclosure pursuant to Massachusetts law. It is intended solely for the addressee. If you received this in error, please contact the sender and delete the material from any computer. _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users |
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Re: Loading data with ogr2ogr
by Frank Warmerdam-2
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Pål Kristensen wrote:
> Hi! > > I have loaded some data from ArcSDE 9.1 to PostGIS using the ogr2ogr > utility. The load statements typically looks like this: > > ogr2ogr -nlt LINESTRING -nln n50_begrensningskurve -lco > GEOMETRY_NAME=the_geom -a_srs EPSG:32633 -f PostgreSQL PG:"dbname=kartdata > user=**** host=***.***.***.***" > SDE:***.***.***.***,5157,,sde_user,sde_password,n50.begrensningskurve > > The problem is that the resulting table in PostGIS has a SRID value of 1, > but it should be 32633. I have tried to include the s_srs option to override > the source projection, which by the way is 32633, but that did not do any > difference. > > I have used the UpdateGeometrySRID function to change the SRID after > loading, but that seems like a workaround that really not should be > necessary. > > Is there something I've missed that causes this behavior? Any ideas? Pål, Can you confirm that the spatial_ref_sys table is populated? Normally ogr2ogr attempts to find an exact match for the coordinate system in spatial_ref_sys (based on comparing the WKT strings) and if one is not found it should try and create a new spatial_ref_sys entry with the SRID being one higher than the highest currently used value. The fact that it selected "1" suggests to me that the table might be empty. Note that OGR does not, and will not, make the assumption that SRIDs map 1:1 to EPSG codes. The trick really is to ensure that the WKT matches something exactly in the spatial_ref_sys. So for the -s_srs (or -a_srs) you should use the exact string from the spatial_ref_sys. This can be stored in a file. I'd like to have a layer creation option to select a particular SRID by SRID number for the PG driver, but that hasn't been implemented yet. Should my assumptions about the spatial_ref_sys table be wrong, please consider filing a bug against GDAL/OGR promptly. We have only a few days before the 1.5.0 release to fix any serious problems in the postgis driver. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@... light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | President OSGeo, http://osgeo.org _______________________________________________ postgis-users mailing list postgis-users@... http://postgis.refractions.net/mailman/listinfo/postgis-users |
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Re: Loading data with ogr2ogr
by Pål Kristensen
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Hi Frank! Thanks a lot for the help, your assumption was totally correct. For some reason the spatial_ref_sys table was empty, and a new entry with SRID 1 and the right WKT was created. After population the spatial_ref_sys table the data loading completed correctly. Thanks again for the help! Regards, Pål Kristensen |
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