Support for yandex maps about gmapcatcher HOT 14 CLOSED

Another Map service provider is:
http://www.openstreetmap.org/

some findings about Open Street Map (OST)
 http://a.tile.openstreetmap.org/0/0/0.png
 http://[server(a,b,c)].tile.openstreetmap.org/[zoom]/[x]/[y].png

... doing some digging in Yandex but no much success yet, here is what I found 
so far:

I was able to get to one of the tiles servers, but it looks different:
http://vec01.maps.yandex.net/tiles?l=map&v=2.2.3&x=2&y=5&z=4

Attached is a file that might contain some answers

Instead of hardcoding all the map servers option should be provided to the 
(advanced) users to add new map server urls.

the (advanced) users can go into the code and add new map servers in that way 
regular user can use it

Add initial support for yandex maps, see r1057

Please note: Yandex map projection is different from Google/OSM/etc., so 
lat/lon -> tile x y conversion is invalid at the moment. It is not very hard to 
fix it in mapUtils.py - someone just have to add a bit more calculations in 
coord_to_tile/tile_to_coord functions as it was done in unit2latlon/latlon2unit 
here: 

http://maemo.shmuma.ru/mapper/patches/maemo-mapper_2.5.1-yandex1.patch

You can find more information in Maemo Mapper with Shmuma patches that adds 
full support for Yandex maps. Link to the source archive with patches:

http://maemo.shmuma.ru/mapper/src/maemo-mapper_2.5.1-os2008-yandex1.tar.gz

As is right now looks good enough to me...

Steps to reproduce:

1. Download Google Earth
2. Run it, choose some point in Russia - in the center of Saint Petersburg e.g.
3. Save this point.
4. Open GMapcatcher with Google/OSM maps and open/locate the given point.
5. Increase zoom level to maximum possible.
6. Switch to the Yandex maps.

You'll see the difference is about 20-30 km. So you can browse the world, but 
you can't use this data for real navigation with GPS.

This issue is known by all developers of similar applications (Maemo Mapper, 
RMaps for Android etc.)

Moreover, Google uses Mercator spheroid projection, Yandex - Mercator 
ellipsoid. The difference can't be seen with zoom level on your screenshot.

Now I see! thank you very much for your explanation.

Hello Maxim and Helder,
  the yandex maps are broken when setting "Use a different folder per Map Service" is checked. There is missing an 'elif' in function get_url_from_coord in file mapServices.py. 

Tomas