[Xastir] Script to cache some maps

[David Ranch]

> ​https://metacpan.org/pod/distribution/Geo-OSM-Tiles/downloadosmtiles.pl
>
> Looks like there's an existing script ​that can download OSM tiles.  I have
> not tried it, and if it works I would use with care given the tile usage
> policy.

Interesting.. so I wonder:

   - Where you would need to run that program in to places the files in 
the correct Xastir path
      ~/.xastir/OSMtiles/mapnik/

   - Would the resulting files be in the proper format to Xastir to use 
them
      looks like it since it writes png and Xastir uses png


There doesn't seem to be any network / tile throttling support so I 
guess one would need to specify one region at a time, sleep a while, do 
the next zoom, etc.  Looks pretty promising though!

--David
KI6ZHD