Hi,
I'm trying to understand the status of 3D geometries in PostgreSQL/PostGIS. I'm
examining the 3D tests in the in the jdbc-postgis module.
I see two problems with the testing framework; the first it assumes only 2D
geometries. Perhaps some hint for the required dimension (2D or 3D) in the
FeatureType or passed to the schema constructor is needed. See JDBC3DTest.
checkCreateSchemaAndInsert(), JDBCDataStore.createSchema(),
BasicSQLDialect.postCreateTable() and PostGISDialect.postCreateTable() for
points of interest.
The second problem is that JTS Geometry.toText() (and toString()) only creates
a string representation containing 2D points despite the data having 3D. I have
no obvious suggestion here apart from creating a utility method to examine the
geometry and create our own string representation. There might be something
that does this already or a start in the right direction.
Are these points correct in regards to 3D geometries in PostgreSQL/PostGIS? I
would like to get 3D geometries in PostGIS working in GeoTools. Are there other
areas of immediate concern?
Brett
Brett Walker <brett.wal...@geometryit.com<mailto:brett.wal...@geometryit.com>>
Software Developer / Analyst
Geometry Pty Ltd
Telephone 03 6223 1999
Mobile 0458 498 386
Fax 03 6223 1988
Web www.geometryit.com<http://www.geometryit.com/>
Address 31 Salamanca Square, Battery Point, TAS 7004,
Australia
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