On 04/04/2011 10:40, Alexandros Papadopoulos wrote:
I've had pretty much the same question for some time now. The tricks
suggested above sound good but I'm not sure how to actually implement
them: I have been marking POIs on my Garmin unit for months (mostly
during a roadtrip through Asia) and would like to add them to OSM.
Many of them are (e.g.) drinking water amenities in the middle of
nowhere, so importing the POI from the GPS is really the only way to
place it accurately on the map. POIs are also usually not connected
with tracks, because I wasn't recording tracks all the time (no
frequent access to computer, and my GPS can only store 10,000 track
points)
Is there documentation anywhere on how to do that from a Garmin
device? I can get the POIs onto MapSource, but don't know how to
transfer them to OSM. Manually adding them to the map with Potlatch is
inaccurate, error prone and extremely time consuming.
In order to get Garmin waypoints into OSM for Potlatch editing, the
trick I use is to (manually) add a small track to the file at around the
location of one of the waypoints.
As an example, in the GPX that you saved from mapsource, if this is one
of the waypoints
<wpt lat="53.3372638" lon="-1.2587144">
<ele>85.9228516</ele>
<name>001</name>
<cmt>23-OCT-10 14:05:17</cmt>
<desc>23-OCT-10 14:05:17</desc>
<sym>Parking Area</sym>
<extensions>
<gpxx:WaypointExtension
xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode>
</gpxx:WaypointExtension>
</extensions>
</wpt>
Then, using a text editor, adding this:
<trk>
<name>SOME_WPTS</name>
<extensions>
<gpxx:TrackExtension
xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3";>
<gpxx:DisplayColor>DarkGray</gpxx:DisplayColor>
</gpxx:TrackExtension>
</extensions>
<trkseg>
<trkpt lat="53.3372638" lon="-1.2587144">
<ele>306.7978516</ele>
<time>2010-10-23T13:02:53Z</time>
</trkpt>
</trkseg>
</trk>
between the </wpt> and </gpx> of the file containing just waypoints
should allow you to upload them. If the waypoints cover a large area
you'll need to manually zoom in to the location of the waypoint, then
unlock using whichever Potlatch version you're using (click and unlock
in P1, alt-click in P2. In both versions you'll want to edit out tags
that have a meaning to Garmin but not to OSM (such as "cmt"); in P2 you
can do this easily by clicking "advanced" and deleting the tags that you
want to get rid of.
Cheers,
Andy
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