They are links between tables. Usually, between the attribute table of a feature class and a simple (non-spatial, as Mike said) table. But you can relate any kind of attribute tables.
-marius On Thu, 2011-04-28 at 14:30 -0700, Paul Ramsey wrote: > Are they tables or links between tables? I can see this is going to > be a hard project to do without ArcGIS handy :) > > P. > > On Thu, Apr 28, 2011 at 10:26 AM, Smith, Michael ERDC-CRREL-NH > <[email protected]> wrote: > > Relations are joins to non-spatial tables containing domain values etc. They > > are relational tables. > > > > Mike > > > > > > -- > > Michael Smith > > Remote Sensing/GIS Center > > US Army Corps of Engineers > > > > > > > > On 4/28/11 1:19 PM, "Even Rouault" <[email protected]> wrote: > > > >> Le jeudi 28 avril 2011 02:11:30, Paul Ramsey a écrit : > >>> > >>> I assume the failures are relationships we don't handle yet (or ever > >>> and will need to be silenced). > >>> > >> > >> Not sure what those relations things are. > >> > >>> There is a test file in the FGDB API itself, and it fails to open > >>> entirely, which seems odd, > >>> > >>> [pramsey@localhost data]$ ogrinfo ./TestData.gdb > >>> ERROR 1: GDB Error: Failed to open Geodatabase long:-2147467259 > >>> ERROR 1: GDB Error: Failed to open Geodatabase long:-2147467259 > >>> FAILURE: > >>> Unable to open datasource `./TestData.gdb' with the following drivers. > >>> > >>> Do other folks have trouble opening the ESRI sample file? The error > >>> code doesn't make much sense, it is supposed to mean "If the path is > >>> seriously in error, say pointing to the wrong drive, a -2147467259 > >>> (E_FAIL) error is returned" and relates to the CreateGeodatabase > >>> method, not the OpenGeodatabase method. > >> > >> Yes I did notice that issue too. I assume either the example is corrupted, > >> either it is a bug in the FileGDB API, either... Perhaps reporting to ESRI > >> might be usefull. Or perhaps Ragi has some clues. > >> > >> Even > >> _______________________________________________ > >> gdal-dev mailing list > >> [email protected] > >> http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > > _______________________________________________ > > gdal-dev mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
