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Locations (codenamed Splinter) is a location sharing application based on GPS and SMS. It uses OpenStreetMap as its map source and allows users to manage and share saved locations.
In addition to downloading map images from the OSM server, Locations also supports local maps, which can be downloaded through the Installer. You can also create your own maps if your city is not available. For more information, refer to the Create Offline Maps section below.
Use the MAP view to manage Tags with options to save, edit or send. MAP view also allows users to browse maps with zoom in and zoom out for accurate locating. If you get lost while browsing, simply tap the REFRESH button to return to your current position. It's that easy.
LIST view is a a centralized place to view all of your Tags. The LIST view is a combination of your own saved Tags and Tags received by friends. Selecting a Tag takes you to the exact position of the Tag in the MAP view.
Once you are connected to GPS, saving and sending tags to friends is fun and simple.
Locations is a UI application, communicating with the diversity-daemon dbus interface to get all the data it needs. What Locations does and shows is based on and through diversity-daemon, like tag management, sharing, map downloading and GPS status.
Locations uses the EFL library to implement UI. Synced with diversity-daemon, Locations has objects, world and viewport concepts. There is a dbus wrapper layer for the diversity-daemon. In the UI, we have widgets like dialogs, menus, different objects like tags, map tilesets, etc.
In control part, we have a nav object for controlling the navigation, showing the tileset.
Maps can be installed from Installer.
NOTE: Map packing eats lots of memory and fails easily on NEO. |
Locations comes with a tool called om-locations-map-pack. It can be used to pack tile images downloaded from the OSM server into a map package:
om-locations-map-pack /tmp/diversity-maps my_map.eet
Place my_map.eet in either of the directories
/usr/share/om-locations/maps /media/card/om-maps
and Locations will find it automatically.
To share maps for other Neo users to install, see directions on how to * Add a package to Openmoko Repository
By default, tiles downloaded from the OSM server are stored in /tmp/diversity-maps. They disappear after rebooting. This default path can be changed to, for example, use SD card by adding/editing one line
tile_path = /media/card
to ~/.om-locations/config/om-locations.cfg.
You can download tiles of a region by specifying -d option in om-locations-map-pack. The usage is
om-locations-map-pack -d version,source,min_level,max_level,lon,lat,width,height <tile-path>
For example, to download tiles of Taipei and store them on the SD card, one can
om-locations-map-pack -d 0,osm,5,16,121.5,25.0,0.1,0.1 /media/card
Those important are the last four parameters, which give the region to download.
For now, nmea logging is off by default. To get nmea log for being used, we can send dbus message after om-locations launched as below:
dbus-send --session --dest=org.openmoko.Diversity --type=method_call --print-reply /org/openmoko/Diversity/objects/0/equipments/nmea org.openmoko.Diversity.Equipment.SetConfig string:log variant:string:/home/root/nmealog
Then the log will be saved to /home/root/nmealog in this example.
After om-locations terminated, logging will stop.
The size of log file will increase soon. For now be warned, if the dbus message was sent again, then the log will be overrridden. So backup or do some hacking first before doing that.
[1] git repository of Locations - http://git.openmoko.org/?p=om-locations.git;a=summary
[2] Diversity project - http://diversity.projects.openmoko.org/
[3] Assassin project - http://code.google.com/p/om-assassin/
[4] OpenStreetMap - http://www.openstreetmap.org/