[Xastir] Script to cache some maps

[Hal Mueller]

The scaling and numbering work pretty much the same across all systems. Some have the Y axis south positive, and some have it north positive. Scaling is the same, and they all use the Google spherical Mercator projection.

Hal N3YX

> On Nov 19, 2015, at 2:04 PM, Skyler Fennell <electricity440 at gmail.com> wrote:
> 
> Is the tiling system with the zoom/x/y.png standard for non OSM like the ArcGIS topo?
> 
> Does this system work cross between maps, ex. Does 5/5/5.png have the same lat long bounds between any tile map?
> 
> Kd0whb