[maemo-users] Looking for gps logger for n810

From: Andrew Daviel advax at triumf.ca
Date: Sun Apr 5 02:14:57 EEST 2009
On Sun, 29 Mar 2009, Mark Haury wrote:

> Waypoints/POIs can be entered by just
> tap-holding and in the resulting menu click on Tap Point->Add POI...

Thank you for this .. seems the obvious tabletty thing to do so of course 
I didn't think of it. I'd prefer a hardware button "record the current 
position as a waypoint" as on my Garmin (press and hold "enter" as I 
recall") but don't think it appears in the config. "Insert a track break" 
does, which I recently assigned to a key, and the position can be pulled 
out of the track GPX with a little effort.

Re. the original question, I have a script which stores a track in a 
binary tree database which I can later interrogate to find where I was at 
a given time, i.e. the timestamp on a digital photo.

One thing is it takes ages to save the track from maemo-mapper (I guess 
convert from some internal format to GPX) so you want to do it often. I 
mean, every day or so. My Garmin has limited RAM and so an 
auto-filter feature for tracks. I'm not sure exactly what it does, but in 
principle if you are going mostly in a straight line at constant speed 
you need only save the acceleration/turn points. My photo script does 
interpolation to guess the actual position.
I was trying to write a filter to post-process mapper tracks but it's 
crude. Probably there are tools out there but I haven't looked; I tend to 
write my own in Perl and make maps in XFig.

Andrew Daviel, TRIUMF, Canada

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