Do not use as a primary means of navigation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License (GPL) for more details.
GPX format is used for data interchange between GRASS and GpsBabel. If the requested output is GPX, then gpsbabel is never run.
OGR's GPX driver knows a number of standard field names. If an attribute column matches the name it will be used in that field. Otherwise the attribute will be placed within the <extensions> metadata section of the record. Not all fields names are used with all feature types (e.g. DOP fix error is not meaningful for route lines). You can use the v.db.renamecolumn module to rename columns.
These are the standard GPX data fields known to OGR:
ageofdgpsdata cmt: Comment course desc dgpsid: DGPS station type ele: Elevation fix geoidheight hdop: Horizontal dillution of precision (estimated fix error) magvar: Magnetic variation name number pdop: Positional dillution of precision (estimated fix error) route_fid route_point_id sat speed src sym time track_fid track_seg_id track_seg_point_id type url urlname vdop: Vertical dillution of precision (estimated fix error)
v.out.gps -t input=trail output=trail.gpx
v.out.gps -w input=waypoints format=garmin output=/dev/ttyUSB0 v.out.gps -t input=tracks format=garmin output=/dev/ttyUSB0 v.out.gps -r input=routes format=garmin output=/dev/ttyUSB0
GpsBabel.org
The GDAL/OGR GPX format page
cs2cs from PROJ.4
Available at: v.out.gps source code (history)
Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730
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