Default value
0
The world map is a three-dimensional block of turfs with coordinates ranging from (1,1,1) to (maxx,maxy,maxz). If set at compile time, it provides a lower bound and will be increased as needed by the map files.
The default value is 0, indicating no map. If any of the map dimensions are set to non-zero values at compile time, the others will default to 1.
New territory created by increasing the map boundaries is filled in with the default turf and area (world.turf, and world.area).