I am not sure, but I suppose that Navigator uses earth.osm only to be able to link all single country maps to each other (imagine there is a world map drawn as a puzzle and you will need to know where exactly to put each country puzzle piece).
so,i have tried to download maps from india country but there is no information given in osm.org website.instead they given some important places belong to asia continent such as banglore,chennai,mumbai(which belong to country india) which i am not living in.
after that i have exported manually some map of my place and i copied the exported osm file to sdcard/data of my mobile and i rebooted my phone.then also nothing happened. i opened navigator(map factor) app and i see no map is on it and no data available in options etc.it is just empty without showing any data.
i have exported manually some map of my place from osm.org and i copied the exported osm file to sdcard/data of my mobile and i rebooted my phone.then also nothing happened. i opened navigator(map factor) app and i see no map is on it and no data available in options etc.it is just empty without showing any data.