Town Map (.town)

The isometric tile map of a town is stored in ./iso/towns/<id>.town. A sibling file <id>.editor uses the same layout.

A map is a grid of 128 x 452 tiles. The file is a 26 byte header followed by the tile array of 128 * 452 = 57856 tiles, 4 bytes each (57856 * 4 = 231424 bytes), so the tile data begins at offset 0x1a.

Each tile is defined as:

          | 00  01   02  03 |
00000000  | Tile ID | Terrain |

Tile ID is a uint16 selecting the ground or object tile (observed range 0..904). Terrain is a uint16 that packs the elevation level and a slope code as Terrain = (Level << 8) | Slope:

The tile at column x (0..127) and row y (0..451) is located at 0x1a + (y * 128 + x) * 4.

The grid is split at row 226: rows 0..225 cover the town itself (the same area as the build mask), while rows 226..451 describe the surrounding world and sea.

The Tile ID does not map directly to a tile filename. The lookup from Tile ID to a concrete tile is resolved internally by the engine and is not stored in the game's text files.

Header

The purpose of most of the 26 byte header is not yet identified. The uint16 at offset 0x02 holds the map width (128).