[OSM-newbies] placing a POI at a precise location

[Alexandros Papadopoulos]

On 4 April 2011 11:30, SomeoneElse <lists at mail.atownsend.org.uk> wrote:
> 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.

Thank you, this is going in the right direction.

Using this trick I uploaded a sample GPX with a single waypoint (a
post box in London):
http://www.openstreetmap.org/user/AlexandrosPapadopoulos/traces/981138

I then follow the "edit" link from the "Your GPS traces page":
http://www.openstreetmap.org/edit?gpx=981138

This brings up P2, but I can't find my waypoint. Following the "GPS
data" -> "My tracks" pulldown menu and selecting "Load" for this gpx
again doesn't seem to do much.

Stuck at this point.

Cheers

Alex