[pkg-fso-maint] tangogps and openstreetmap

[Mitja Kleider]

Hi,

Am Sonntag, den 01.03.2009, 21:58 +0100 schrieb Joachim Breitner:
> Am Sonntag, den 01.03.2009, 20:36 +0100 schrieb Steffen Moeller:
> > I read through http://wiki.openmoko.org/wiki/TangoGPS#Debian and felt that it was not
> > completely right. Is the activation of the device truly necessary? Rather not, it seems,
> > at least not for me.
> 
> Yes, it should work without activation.

Yes, it does.

> > The directory /root/Maps seems to find some consensus between Qtopia and Debian concerning
> > the location of OpenStreetMap data that was downloaded for offline reuse. I'd prefer to
> > use /var/cache/osm, instead. Would that sound reasonable to you as well? Or is there a
> > better location?
> 
> Downloaded maps are user data, thus should be below ~ (i.e. /root while
> running as root, /home/someone while running as a normal user).
> 
> That said, it should probably be in ~/.tangoGPS, to follow unix
> convention.

It is user data and should be below ~, but there are many programs that
access OSM tiles (like tangoGPS, Viking, Rana, pylgrim, Yaouh!). They
should all access the same directory instead of creating their own
cache.


> > How can I quit using tangoGPS without using the Unix shell to kill it? ALT-F4 or CTRL-Q or
> > Q don't seem to work and I don't want to use the keyboard either, really. Am I right in
> > that there is a quit-button or menu-entry missing?

There is no menu entry. I quit tangoGPS either  by clicking "x" in the
title bar or by pressing CTRL+C in the terminal where I launched it.
I could ask the author for adding a quit button in the config section.


> > When tracking for OpenStreetMap (while playing Mokomaze), how can I reasonably
> > user-friendly prevent the freephone to go to sleep (darken the screen)?

Darkening of the screen should not be blocked.
I was tracking for multiple days without possibilities to recharge the battery. Darkening of the screen was helpful.
Suspend did not happen while running tangoGPS.


> > My GPS data is rather unreliable when staning still. Speeds of 0.7 (find but rare) via 2
> > or 3 (often) up to 9 km/h are reported when the correct speed is 0. Is there a way to help
> > with calibration of some sort? My handheld GPS receivers are better (also tracking more
> > satellites, though). Do you observe something similar?

I observe the same (2-3 km/h while standing still). Thought that would
be the normal accuracy of common GPS receivers.
Maybe the accelerometers could be used to find out when you are standing
still.
I did not try the hardware GPS fix or an external antenna.

Greetings,
Mitja