WDT

WDT files specify exactly which map tiles are present in a world, if any, and can also reference a "global" WMO. They have a chunked file structure.

MPHD chunk

• Header chunk.

Contains 8 32-bit integers. The first integer is 1 for maps without any terrain, 0 otherwise. The rest are always 0.

MAIN chunk

• Map tile table.

Contains 64x64 = 4096 records of 8 bytes each. Each record can be considered a 64-bit integer: 1 if a tile is present, 0 otherwise.

MWMO, MODF chunks

For worlds with terrain, the MWMO chunk is empty and there is no MODF chunk. For a global-WMO-only world, these chunks specify an object in the same format as it is already done in ADT files. See the ADT format description for details.