On Thu, Feb 14, 2008 at 2:04 AM, Robert Vollmert <[EMAIL PROTECTED]> wrote:
> Hello, > > On Feb 13, 2008 9:41 AM, Gregory <[EMAIL PROTECTED]> wrote: > > Maybe (I possibly thought this when I started) so nobody knows > > where I live/start, but I could easily not worry about that. > > > On Feb 13, 2008, at 19:14, Karl Newman wrote: > > Yeah, I've been collecting traces, too, but not yet uploading them > > because I don't really want the cluster of points around my house. > > I found a graphical editor that can edit traces (GPSTrackMaker) but > > I haven't had time to edit them for uploading yet. > > I believe gpsbabel supports this kind of operation: > > gpsbabel -i gpx -f raw.gpx -x > radius,exclude,distance=1.5M,lat=30.0,lon=-90.0 -o gpx -F filtered.gpx > > should remove all points within 1 1/2 miles of the specified lat/lon > pair from raw.gpx, saving the output in filtered.gpx. (I haven't > tested this.) > > See also http://www.gpsbabel.org/htmldoc-development/ > filter_radius.html . > I tried exactly that filter first, a while ago. For some strange reason, that filter only works on waypoints, not trackpoints. I think I read somewhere that the author said it "didn't make sense" to filter trackpoints like that--didn't know what to do with the points after the gap (hint: new track segment). > Would it make sense to add these kind of filters to the GPX upload > facility to encourage more people to upload their traces? It would probably encourage more people like me to upload. However, since I carry my GPS around with me almost everywhere (at least when I'm going places where I don't yet have tracks), I'd probably need to filter out a bunch of useless stuff anyway, such as the cluster of points when I stop at a store or something. I'd also > like some automatic time shift (to say the first of the month, at > 0:00)... What's the purpose of that change? To disguise the actual timestamps? Karl
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