GEODATA.DAT

Created in the MissDat folder when you start a battlescape mission, also copied to the savegame folder of choice when saving mid-mission. Primarily used for Battlescape Map Generation and to determine which MCD files to load.

File is 92 bytes long for both UFO and TFTD. Values are presented according to byte offset (0 to 91) followed by the equivalent hex offset (00 to 5B) in bold.

Structure

Offset (Decimal)	Offset (Hex)	Usage
0-1	0x00-0x01	Amount of map modules to place vertically (Y dimension of the map / 10).
2-3	0x02-0x03	Amount of map modules to place horizontally (X dimension of the map / 10).
4-5	0x04-0x05	Z dimension of the map.
6-7	0x06-0x07	X-COM craft type (ignore this if a base mission): UFO TFTD 0: SkyRanger 0: Triton 1: Lightning 1: Hammerhead 2: Avenger 2: Leviathan 3: Interceptor *1 3: Barracuda *2 4: Firestorm *1 4: Manta *2 5: Small Scout 5: Survey Ship 6: Medium Scout 6: Escort 7: Large Scout 7: Cruiser 8: Harvestor 8: Heavy Cruiser 9: Abductor 9: Hunter 10: Terror Ship 10: Battleship 11: Battleship 11: Dreadnought 12: Supply Ship 12: Fleet Supply Cruiser *1 Requires maps "Interc" and "Fires". These don't exist normally, though XcomUtil adds versions similar to the SkyRanger and Lightning. *2 Requires maps "Barracud" and "Manta". These don't exist normally, though XcomUtil adds versions similar to the Triton and Hammerhead
8-9	0x08-0x09	Alien craft type (ignore this if not a UFO mission). Uses the above values.
10-11	0x0A-0x0B	Terrain type. Typically depends on the mission type and location. UFO TFTD 0: Jungle 0: Seabed 1: Farm 1: Pipes 2: Forest 2: Crashed Plane 3: X-COM Base 3: Atlantis 4: Alien Base 4: Mu 5: Urban 5: Sunken Galleon 6: Desert 6: Sunken Liner 7: Mountains 7: Volcanic 8: Polar 8: Coral 9: Mars 9: Artefact Site Stage 1 10: Artefact Site Stage 2 11: Cargo Ship Stage 1 & 2 (Check MISDATA[20-21] 12: Port Attack for which) 13: Island Attack 14: Colony Stage 2 15: T'leth Stage 1 16: T'leth Stage 2 17: T'leth Stage 3 18: X-COM Base 19: Passenger Ship Stage 1 20: Passenger Ship Stage 2 21: Colony Stage 1
12-47	0x0C-0x2F	A byte list of length [0-1]*[2-3], which details the map modules used to build the battlescape. Reads in order from west to east, north to south. For example, in the case of the largest map (60x60), this list would be 36 bytes (offsets 12 through to 47). Values of 253/254/255 mean that the a module does not need to be placed in that area because a large 2x2 module (eg. An X-COM hangar) has already covered it.
48-83	0x30-0x53	A byte list of length [0-1]*[2-3], one for each map module to be loaded by the game during Battlescape Map Generation (as detailed at [12-47]). A byte here will be set to 1 if the RMP file for that module is to be loaded, or 0 if it is not. This is determined by whether X-COM/alien craft exist within the modules - those modules with craft will not have their own RMP files loaded (instead, the craft route nodes will be added to the combined table once all other nodes are in there). In the case of the largest maps (60x60), this list will be 36 bytes long (offsets 48 through to 83).
84	0x54	Amount of craft to be placed on the map. 0: None. 1: X-COM craft only. 2: X-COM and alien craft.
85	0x55	Mirror of [6-7] (X-COM craft type).
86	0x56	Y location of X-COM craft on map. Usually a multiple of 10.
87	0x57	X location of X-COM craft on map. Usually a multiple of 10.
88	0x58	Mirror of [8-9] (alien craft type).
89	0x59	Y location of alien craft on map. Usually a multiple of 10.
90	0x5A	X location of alien craft on map. Usually a multiple of 10.
91	0x5B	Unknown, never seen it flag.

See Also

• Missdat Files
• Battlescape Map Generation