Thread: [Announce] modRana: a flexible GPS navigation system
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MartinK is offline MartinK
2013-05-05 , 21:11
Posts: 1,548 | Thanked: 7,510 times | Joined on Apr 2010 @ Czech Republic
#1361
Originally Posted by sixwheeledbeast View Post
Is there any chance of downloadable map packs for ModRana?
It can be a pain downloading around this area at different zoom levels.
In past tests if you set to download maximum amount of tiles for around my area, it slows the system down so much it becomes unresponsive.
I've recently fixed some GTK threading issues, so batch download should now be faster and should no longer slow down if there are no GUI changes going on.

Also, I found that the the mbtiles tile storage format is very similar to the modRana sqlite tile storage format. It will not work with modRana as-is, but the changes needed for supporting mbtiles should be quite minor. Basically just telling modRana to look for mbtiles files in layer folder and trying to fetch the tile from them first.

There might be some mbtiles downloads or you can just mill your own tiles with tilemill & then export them in the mbtiles format.

Originally Posted by malfunctioning View Post
Although I still haven't tried doing this, I'll believe you, and agree that downloadable maps might be a good idea.

If modRana has a i386 Linux version, I suppose this process could be done also in a PC.
ModRana runs just fine on Linux PCs - just download the tarball (or clone it from github), unpack it somewhere and run modrana.py.

All map tiles will be stored in ~/.modrana/maps

Originally Posted by malfunctioning View Post
I have a question, which will probably reveal my absolute lack of knowledge in this area: What modRana needs to navigate and give directions is embedded in the map data, but that metadata is separate from the graphic tiles? Because it would be a good idea to just download that metadata without downloading the tiles (or just downloading very low resolution tiles) and it seems it would save a lot of space. If you have voice navigation this would even make more sense.

Does modRana even need any tiles to be able to give directions?
Routing is totally independent from map tiles - the tiles are currently just PNG/JPEG images and don't have any additional use apart from showing the map.

By default modRana uses online routing provided by Google, but also supports offline routing with Monav. See the modRana offline routing guide for how to configure and use it. The modRana Monav routing data repository covers the whole planet, including the recently added Antarctica.

BTW, many thanks to the Masaryk University NLP laboratory for hosting the ~120 GB repository and providing the computational resources that enable global updates taking just 5 hours.
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modRana: a flexible GPS navigation system
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Last edited by MartinK; 2013-05-05 at 21:13.
 

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