Hi Franck, Does the field definitions will replace the need to define a csvt file for defining the types of a CSV file read with the VRT format to get geographical coordinates ?
Best regards, Alexandre Gacon On Fri, Oct 30, 2009 at 9:18 AM, Frank Warmerdam <[email protected]>wrote: > Folks, > > I have done a bit of work around OGR recently to make it easier to manage > schemas for layers as VRT files. For a project I wanted to be able to > have a VRT file which would define a set of layers with geometry types, > coordinate systems, fields and related information that I could use > with ogr2ogr or similar utilities to create all the layers. > > To that end I have: > > o Extended the VRT driver to support <Field> definitions giving all > the details of an attribute field on a layer (type, width, name, > precision > and the source field it comes from in the source layer). > > o Written an ogr2vrt.py script that will create a VRT corresponding to a > source datasource. This is the ogr equivelent to what we could do with > gdal_translate -of VRT in.tif out.vrt but for feature datasources. The > script currently lives in gdal/swig/python/samples but I may promote it > to the scripts directory implying it is supported if it is deemed to be > useful. > > o Modified the VRT driver so that if the datasource name is @dummy@ it > will > not go looking for an external file - it just creates a dummy memory > datasource and layer. This effectively turns the .vrt into a schema > definition since there will be no effort to go looking for features on > the layers. The -schema switch to ogr2vrt.py will create a VRT setup > this way. > > Let me know if there are any questions or interest in this capability. > > Best regards, > -- > > ---------------------------------------+-------------------------------------- > I set the clouds in motion - turn up | Frank Warmerdam, > [email protected] > light and sound - activate the windows | > http://pobox.com/~warmerdam<http://pobox.com/%7Ewarmerdam> > and watch the world go round - Rush | Geospatial Programmer for Rent > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Alexandre Gacon
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