[gdal-dev] ogr2ogr and GPX files

[Tamas Szekeres]

Dylan,

Would you attach this ogr2ogr commandline string and the corresponding
test data to
http://trac.osgeo.org/gdal/ticket/2171
I'll look into the problem than.

( That's why I still haven't closed this ticket ;-)


Best regards,

Tamas


2008/3/4, Dylan Beaudette <dylan.beaudette at gmail.com>:
> On Tuesday 04 March 2008, Tamas Szekeres wrote:
>  > Hi,
>  >
>  > Yes, you should try with the recent SVN version. The changes related
>  > to this issue are pretty new.
>  >
>  > Best regards,
>  >
>  > Tamas
>
>
> Hi Tamas,
>
>  Thanks for the tip. Unfortunately, even with today's SVN, I still get the same
>  error:
>
>
>  ERROR 1: SQL: Missing comma after column cat in SELECT statement.
>
>
> Cheers,
>
>
>  Dylan
>
>
>
>  > 2008/3/4, Dylan Beaudette <dylan.beaudette at gmail.com>:
>  > > On Monday 03 March 2008, Even Rouault wrote:
>  > >  > In fact, using the same principle, you can use just one command line
>  > >  > and no intermediary file :
>  > >  >
>  > >  > ogr2ogr -f GPX destination.gpx source.shp -sql "SELECT  src_field_1 AS
>  > >  > name, src_field_2 AS desc FROM your_source_layer_name"
>  > >  >
>  > >  > Thanks to FrankW for the tip ;-)
>  > >
>  > > Thanks Even / Frank.
>  > >
>  > >  One small problem:
>  > >
>  > >
>  > >
>  > >  ogr2ogr -t_srs '+proj=latlong +datum=WGS84' \
>  > >  -f GPX -dsco GPX_USE_EXTENSIONS=YES \
>  > >
>  > > veg_points.gpx veg_points.shp \
>  > >  -sql "SELECT cat AS foo FROM veg_points"
>  > >
>  > >  ERROR 1: SQL: Missing comma after column cat in SELECT statement.
>  > >
>  > >  Could this be a bug or my version of GDAL too old ? This is with GDAL
>  > > SVN, checked out a couple of weeks ago.
>  > >
>  > >  I get a valid GPX file if I do not use the "AS foo" operator.
>  > >
>  > >  Ideas?
>  > >
>  > >
>  > >  Dylan
>  > >
>  > >  > Le Monday 03 March 2008 19:43:12 Even Rouault, vous avez écrit :
>  > >  > > Hi,
>  > >  > >
>  > >  > > I see your point...
>  > >  > >
>  > >  > > The solution is the powerful OGR Virtual Dataset format !
>  > >  > > See http://www.gdal.org/ogr/drv_vrt.html
>  > >  > >
>  > >  > > In fact, the documentation should probably be extended to
>  > >  > > demonstrate the power of the OGR SQL for that particular case
>  > >  > >
>  > >  > > Try to paste the following lines in a file (remapped_layer.vrt would
>  > >  > > be fine)
>  > >  > >
>  > >  > > <OGRVRTDataSource>
>  > >  > >     <OGRVRTLayer name="remapped_layer">
>  > >  > >         <SrcDataSource>your_source.shp</SrcDataSource>
>  > >  > >         <SrcSQL>SELECT src_field_1 AS name, src_field_2 AS desc FROM
>  > >  > > your_source_layer_name</SrcSQL>
>  > >  > >     </OGRVRTLayer>
>  > >  > > </OGRVRTDataSource>
>  > >  > >
>  > >  > > Replace your_source.shp, src_field_1, src_field_2 and
>  > >  > > your_source_layer_name by the appropriate values from your source
>  > >  > > dataset and 'ogrinfo -ro -al remapped_layer.vrt' should show a
>  > >  > > structure compatible of a GPX file.
>  > >  > >
>  > >  > > Best regards,
>  > >  > > Even
>  > >  > >
>  > >  > > Le Monday 03 March 2008 07:04:41 Dylan Beaudette, vous avez écrit :
>  > >  > > > Hi,
>  > >  > > >
>  > >  > > > is there a simple approach (via ogr2ogr) to create GPS files which
>  > >  > > > have standard waypoint tags such as <name>, <elev>, <cmt>, etc. by
>  > >  > > > re-mapping columns in the attribute table of the source vector?
>  > >  > > >
>  > >  > > > for example:
>  > >  > > >
>  > >  > > > # export points vector from GRASS
>  > >  > > > v.out.ogr in=wp type=point dsn=wp.shp
>  > >  > > >
>  > >  > > > # convert tp GPX:
>  > >  > > > ogr2ogr -t_srs '+proj=latlong +datum=WGS84' \
>  > >  > > > -f GPX -dsco GPX_USE_EXTENSIONS=YES \
>  > >  > > > wp_gps.gpx wp.shp
>  > >  > > >
>  > >  > > > This results in a working GPX waypoints file, that when uploaded
>  > >  > > > to a GPS is functional, but the waypoints are all re-named
>  > >  > > > sequentially. Note that I am uploading the GPX file the GPS via
>  > >  > > > gpsbabel.
>  > >  > > >
>  > >  > > > Does anyone know of the appropriate incantation that one could use
>  > >  > > > to translate the column structure of the input wp.shp (i.e. the
>  > >  > > > stuff in its .dbf) into standard waypoint tags?
>  > >  > > >
>  > >  > > > thanks in advance!
>  > >  > > >
>  > >  > > > PS: trying to write a simple tutorial for some colleagues [1]
>  > >  > > >
>  > >  > > > 1. http://casoilresource.lawr.ucdavis.edu/drupal/node/553
>  > >  > >
>  > >  > > _______________________________________________
>  > >  > > gdal-dev mailing list
>  > >  > > gdal-dev at lists.osgeo.org
>  > >  > > http://lists.osgeo.org/mailman/listinfo/gdal-dev
>  > >
>  > > --
>  > >  Dylan Beaudette
>  > >  Soil Resource Laboratory
>  > >
>  > > http://casoilresource.lawr.ucdavis.edu/
>  > >
>  > > University of California at Davis
>  > >  530.754.7341
>  > >  _______________________________________________
>  > >
>  > > gdal-dev mailing list
>  > >  gdal-dev at lists.osgeo.org
>  > >  http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
>
>
>
> --
>
> Dylan Beaudette
>  Soil Resource Laboratory
>  http://casoilresource.lawr.ucdavis.edu/
>  University of California at Davis
>  530.754.7341
>