开云体育

I just found a new toy!

You'll need 19 GB of file storage for all zoom levels down to 18. I think you'll need another 48 GB of storage for zoom level 19 if I can do math properly.

If you are using these offline maps for something like ARHAB balloon recovery, or similar, you might find that the extreme zoom level maps contain very little extra information than the tiles a couple levels up. There are very few areas where information on every blade of grass, and bit of gravel are mapped.

The precision of the data in the OSM database is no where good enough to have these extreme zoom levels provide much useful information.

Maybe take some time to run through your process (whatever it is you are trying to do offline), and have a look specifically to see if the tightest zoom levels are actually required.?

When I started playing with OSM I wanted similar offline maps for the province of Alberta in Canada.

228 GB is a hefty chunk. I found that I really didn't need anything?closer than zoom level 14.

Looking at your area, by the time you get to zoom level 15, you already have house footprints, and just about all of the information that can be seen. Zoom level 16 has bus stops, and zoom level 17 puts addresses on houses. I'm not sure what more information might be found on zoom 18 and 19. (I just found some park benches and garbage cans at zoom level 19)

I guess there is an argument that can be made for needing very tight zoom tiles, but generally very detailed work doesn't happen on a large scale area all at once.?