[OSM-newbies] ghost ? lines between raw .gpx in JOSM

Ævar Arnfjörð Bjarmason avarab at gmail.com
Sun Feb 15 01:18:03 GMT 2009


On Sat, Feb 14, 2009 at 10:14 AM, Peter Herison <pherison at web.de> wrote:
> Hein Schouwenaars (HPA) wrote:
>
>>What I notice lately that there are (it seems random) lines connecting the
>>various GPS tracks. These are criss cross over the whole area. This must be
>>a bug isn't it? Or can we do something to our tracks to prevent this?
>
> JOSM is assuming that these track points belong together (to a single
> track) and connects them with a line. Donno why this happens. I think
> it has something to do with GPX-File during upload and the timestamp
> for each trackpoint.

It happens because the GPX API doesn't provide editors with enough
information to distinguish between GPX tracks, you just get all track
points in a given bbox.

Thus editors like JOSM have to resort to hackery such as "draw a line
between any two points if they're less than X distance apart".




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