Question 4
From BA3 Mapping Engine Wiki
The mbtiles in the tutorials was created with TileMill available from MapBox here: http://mapbox.com/tilemill/.
The map in the tutorial, which is extremely low resolution and shows no streets or place names, is 12.7 MB compressed.
A much higher resolution vector map in Altus Mapping Engine format with labels for all political boundaries is about 18 MB compressed.
