Quick questions before starting on creating a custom map

[MINKFLOW]

Going to keep this brief.

1. How big are the world cells?
2. How many "cells" would the current Zomboid build's map be?
3. Can new cells be easily added onto an existing map, or should I give myself ample room to expand?
4. When new builds come out, can our custom maps easily be transferred?

Thank you in advance.

[Ciber Ninja]

1. 300 x 300 tiles

2. Lots

3. Pretty easily.

4. Usually.