Frequently asked questions
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I don't have a (working) GPS, is there a public gpsd for testing?
In the config tab you can use 82.240.156.91 as GPSD host.
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Can I use other map repositories?
Yes, you can use any map repository which uses a URL like
"http://foo/bar/zoom/x/y" or the inversed version
"http://foo/bar/x/y/zoom".
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Example:
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Openstreetmap offers a second map repository with differently rendered maps called "Osmarender".
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An example tile URL for Osmarender is:
http://a.tah.openstreetmap.org/Tiles/tile.php/6/32/22.png
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If you put in "%d" for the x,y and zoom values you get a generic URI:
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http://a.tah.openstreetmap.org/Tiles/tile.php/%d/%d/%d.png
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That's it.
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Google uses the inversed version for maps and terrain.
Sample URLs for tiles are (this is public knowledge):
Terrain
http://mt0.google.com/mt?n=404&v=w2.69&hl=en&x=3&y=5&zoom=13&s=Galile
Maps
http://mt0.google.com/mt?n=404&v=w2p.64&hl=en&x=3&y=5&zoom=13&s=Galile
However, Google maps are copyrighted and probably apart from
academic/fair use this may simply not be legal (and I'm not a lawyer).
Thus they work, but ask a lawyer before using google
maps in your country. Much better: help out the openstreetmap.org
project!
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Other cool maps are openpistemap and opencylemap.
How can I get Neo's gllin to write the NMEA logs to the SD-card?
On the Neo you can make a symlink to
write them to the SD-card instead of your phones flash memory:
rmdir /home/root/gllin/log
mkdir /media/card/log
ln -s /media/card/log
/home/root/gllin/log
However, since the new Tracklog feature you rather use this instead of the nmea log files.
How do I replay my trips?
You can use the nmea logfiles from gllin or any other GPS to replay your trip.
Once you have logfiles copy them per scp to your desktop and start
gpsfake (part of the
gpsd package) like so:
gpsfake -b -c 0.1 -o "-n -N" -r
"r" logfile_to_replay.log
and change the "GPSD Host" in the config of tangogps to 192.168.0.200.
Voila!
Is develepment going on?
Short answer: Yes, very actively
Why tangoGPS?
I started with alphaGPS, went up the alphabet and liked
tangoGPS most, not to forget: the
domain was still free and seemingly free of trademark collisions.
and ended up with REPOLIST == NULL,
and now tangoGPS won't start.. Can you please help ;))
dmatijas@iss:~> tangogps
tangogps: /usr/lib/libcurl.so.3: no version information available (required by tangogps)
REPOLIST == NULL
######## ERROR: repository is broken
** on_drawingarea1_configure_event():
pixmap NOT NULL** fill_tiles_pixel(): xyz 2283132 1495468 14
Segmentation fault
This command will not work via an ssh connection but only when executed on a terminal directly on the phone or computer.
If it still does not work, then
gconftool-2 -u /apps/tangogps/repos
is the next step.
Actually it is a known bug and I'll fix it for the next version.
I just got an 8inch 500Mhz x86 Fujitsu Stylistic LT C500 tablet and GPS antenna. They're for my newly acquired travel/family car/truck, a 2006 Scion xB.
[edit by marcus: removed a section which was a copy of a blog entry from Bryan - see it at his website if you are into cars. Bryan: please use trackbacks for this]
But I continue to digress. I've tried gpsdrive, but it wouldn't fit in the 800x600 screen, even though it supposedly had that option. I tried Viking, but I haven't managed to get it to even display a map.
Now to the point. I have tango, and it's awesome. It'll download openstreetmap data on the fly and it shows it in my 800x600 screen! Can you point me to documentation of the procedure I should go through when I want to take this somewhere I don't have any communications except the GPS sats themselves? (Actually, for me that's everywhere that's not a 802.11 hotspot, since I don't have an aircard.) Say, download every zoom level of every tile for a couple of US states, so I can pan over it or drive over it at will? TYIA.
1) Make sure that you Repoistory Directory is not /tmp. Otherwise map tiles will be deleted after every reboot. You can set this in the Config tab.
2) click on the map and choose "Map download" which will download the maps of the currently displayed map area up to six levels deeper.