I've been trying to use gpsbabel (ver 1.4 on Ubuntu 10.10) to filter
some of my tracks prior to uploading, After a few hours experimenting I
find that the following script (based on wiki article) works.
1> # test5.sh testing polygon (include)
2> gpsbabel -i gpx -f intest.gpx \
3> -x transform,wpt=trk,del \
4> -x polygon,file=d_poly2.txt \
5> -x transform,trk=wpt,del \
6> -o gpx -F out_5.gpx
[intest.gpx is a daily file downloaded from my Legend that worked fine
in JOSM or gpsprune. d_poly2 is a polygon definition of the area around
my house.]
It picks up all points in the polygon or outside if ',exclude' is added.
I first tried to run without lines 3 and 5 (which converts tracks to
waypoints and back again - increasing file size with waypoint data :
<name>,<cmt> & <desc> tags ) but no filtering at all took place.
I don't understand why the conversion is needed
- or have I got something else wrong ?
Iain
start of intest.gpx
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<gpx xmlns="http://www.topografix.com/GPX/1/1"; creator="" version="1.1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://www.topografix.com/GPX/1/1
http://www.topografix.com/GPX/1/1/gpx.xsd";>
<trk>
<name>ACTIVE LOG080605</name>
<trkseg>
<trkpt lat="52.811301" lon="-2.145435">
<ele>79.543</ele>
<time>2010-10-04T07:06:04Z</time>
</trkpt>
<trkpt lat="52.811294" lon="-2.145414">
<ele>80.075</ele>
<time>2010-10-04T07:06:05Z</time>
</trkpt>
start of out_5.gpx
<?xml version="1.0" encoding="UTF-8"?>
<gpx
version="1.0"
creator="GPSBabel - http://www.gpsbabel.org";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns="http://www.topografix.com/GPX/1/0";
xsi:schemaLocation="http://www.topografix.com/GPX/1/1
http://www.topografix.com/GPX/1/1/gpx.xsd";>
<time>2010-11-10T21:12:01Z</time>
<bounds minlat="52.807483000" minlon="-2.146208000" maxlat="52.811813000"
maxlon="-2.123633000"/>
<trk>
<trkseg>
<trkpt lat="52.811301000" lon="-2.145435000">
<ele>79.543000</ele>
<time>2010-10-04T07:06:04Z</time>
<name>WPT001</name>
<cmt>WPT001</cmt>
<desc>WPT001</desc>
</trkpt>
<trkpt lat="52.811294000" lon="-2.145414000">
<ele>80.075000</ele>
<time>2010-10-04T07:06:05Z</time>
<name>WPT002</name>
<cmt>WPT002</cmt>
<desc>WPT002</desc>
</trkpt>
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