[Potlatch-dev] GPX time elements

Richard Fairhurst richard at systemeD.net
Sun Oct 10 19:03:26 BST 2010


Craig Stanton wrote:
 > I tried removing all the time elements and then Potlatch
 > complained that the GPX was not valid.

That's not Potlatch, that's a requirement of the OSM API (and has always 
been there).

> Actually I'm not really sure why Potlatch wants to know the time of
 > the points in the GPX, surely location is important and time is
 > irrelevant when creating a way.

As I said in my previous e-mail, "some GPX-producing software 
concatenates different tracks within the same trkseg or trk". Certainly 
I've seen tracks downloaded from some of the simpler Garmin eTrexes 
which are just one single <trk> no matter how many times the GPX was 
turned off and on again.

OSM best practice is that you should set your GPS receiver to record a 
trackpoint at regular time intervals. If you are following this advice, 
and your receiver/software combination produces a single <trk>, then the 
3-minute limit prevents confusing and unsightly lines being drawn 
between separate tracks.

cheers
Richard



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