Landscape

Seven attributes (counting "type_height") hold the informations about a tile.
These attributes are referred to as "type_height", "m1", "m2", "m3", "m4", "m5" and "m6".
The most important value is the class of a tile, stored in the upper 4 bits of the type_height attribute. The lower 4 bits are used to encode the height and slope data.

Special Attribute : m6. There are 4 bits of it that are used accross multiple tile classes

For a graphical representation of the tile-layout have a look at Landscape grid page.

The owner of a tile, as frequently associated with attribute m1, can be either players (human or AI) or "Game entities". They are identified using:
00  current player
01..08  AI or network players
0F  a town owns the tile
10  nobody owns the tile
11  "water" owns the tile
FF  spectator in MP or in scenario editor

OTTD's class-specific periodic tile processing routine is called once every +256 ticks for each tile.

Class Meaning & details of encoding
0  Ground
 
  • m1: owner of the tile (normally 10)
  • m4 bits 7..5: type of hedge on the SW border of the tile (1 through 6, or 0=none)
  • m4 bits 4..2: same as 7..5, but for the SE border
  • m5 bits 7..5: update counter, incremented on every periodic processing for tile types, other than 03, 07, 0B, 10 and above.
    on wraparound, the tile is updated (for fields, the type of fields in m3 is increased, for other types the tile type in m5 is increased).
    For snow and desert, these bits are not used, tile is updated on every periodic processing.
  • m5 bits 4..0: tile type:
    00  bare land
    01  1/3 grass
    02  2/3 grass
    03  full grass
    07  rough land
    0B  rocks
    0F  fields; type of fields in m3 bits 3..0 (legal values: 0 through 9)
    m2: Index into the array of industries (farms), INVALID_INDUSTRY (0xFFFF) if farm has been removed
    10  1/4 snow
    11  2/4 snow
    12  3/4 snow
    13  full snow
    15  partial desert
    17  full desert
  • m6 bits 7..6 : Possibility of a bridge above, in the direction specified
  • m6 bits 1..0 : Tropic zone definition
1 Railway tracks
 
  • m5 bit 7 clear: railway track
    • m1: owner of the track
    • m3 bits 3..0 = track type:
      0  conventional railway
      1  electrified railway
      2  monorail
      3  maglev
    • m4 bits 3..0:
      0  on bare land
      1  on grass, no fences
      2  fence on the NW side
      3  fence on the SE side
      4  fences on the NW and SE sides
      5  fence on the NE side
      6  fence on the SW side
      7  fences on the NE and SW sides
      8  fence on the E side (track in the W corner)
      9  fence on the W side (track in the E corner)
      A  fence on the S side (track in the N corner)
      B  fence on the N side (track in the S corner)
      C  on snow or desert
    • m5 bits 5..0: track layout: bit set = track present:
      bit 0: in the X direction
      bit 1: in the Y direction
      bit 2: in the north corner (direction W-E)
      bit 3: in the south corner (direction W-E)
      bit 4: in the west corner (direction N-S)
      bit 5: in the east corner (direction N-S)
  • m5 bit 7 set: railway depot / checkpoints
    • m1: owner of the depot / checkpoint
    • m2: For waypoints, index into the array of waypoints.
    • m3 bits 3..0 = track type
    • m4 bits 3..0 = ground type, as per m4 bits 3..0 for railway tiles.
    • m5 value C0..C3: railway depot
      m5 bits 1..0
      direction: exit towards:
      00  NE
      01  SE
      02  SW
      03  NW
    • m5 value 80..81: checkpoint
      bit 0
      clear in X direction
      set in Y direction
  • m5 bit 6 set = with signals:
    • m2 bits 7..4: bit clear = signal shows red; same bits as in m3
    • m2 bit 2: set = semaphore signals, clear = light signals
    • m2 bits 1..0 : type of signal
      00: normal signals
      01: pre-signals
      10: exit-signals
      11: combo-signals
    • m3 bits 7..4: bit set = signal present:
      • For track in the X direction:
        bit 6: signal in the SW direction
        bit 7: signal in the NE direction
      • For track in the Y direction:
        bit 6: signal in the NW direction
        bit 7: signal in the SE direction
      • For tracks in the W-E direction:
        bit 4: signal in the W direction on the track in the S corner
        bit 5: signal in the E direction on the track in the S corner
        bit 6: signal in the W direction on the track in the N corner
        bit 7: signal in the E direction on the track in the N corner
      • For tracks in the N-S direction:
        bit 4: signal in the S direction on the track in the E corner
        bit 5: signal in the N direction on the track in the E corner
        bit 6: signal in the S direction on the track in the W corner
        bit 7: signal in the N direction on the track in the W corner
  • m6 bits 7..6 : Possibility of a bridge above, in the direction specified
  • m6 bits 1..0 : Tropic zone definition
2 Roads
 
  • m5 bits 7..6 clear: road
    • m1: owner of the road type #1
    • m2: Index into the array of towns, 0 for non-town roads
    • m3 bit 7 set = on snow or desert
    • m3 bits 6..4:
      0  on bare land
      1  on grass
      2  paved
      3  with streetlights
      5  tree-lined
      6  on grass with road works
      7  paved with road works
    • m3 bits 3..0: counter for the roadworks
    • m4 bits 3..0: road layout road type #1: bit set = road piece present:
      bit 0: NW piece
      bit 1: SW piece
      bit 2: SE piece
      bit 3: NE piece
    • m4 bits 7..4: road layout road type #2
    • m5 bits 4..0: owner of road type #2
    • m6 bits 5..2: road layout road type #3
    • m7 bits 7..5: road types
    • m7 bits 4..0: owner of road type #3
  • m5 bit 7 set, bit 6 clear: road depot
    • m1: owner of the depot
    • m3 bit 7 set = on snow or desert (not displayed, but set internally)
    • m5 bits 3..0 - direction: exit towards: 0 = NE, 1 = SE, 2 = SW, 3 = NW
    • m7 bits 7..5: road types
  • m5 bit 6 set, bit 7 clear: level crossing
    • m1: owner of the railway track
    • m2: Index into the array of towns, 0 for non-town roads
    • m3 bit 7 set = on snow or desert
    • m3 bits 6..4: 0 - on bare land, 1 - on grass, 2 or higher - paved
    • m3 bits 3..0: track type
    • m4 bit 6: clear - road in the X direction, set - road in the Y direction (railway track always perpendicular)
    • m4 bit 5: set if crossing lights are on
    • m4 bits 4..0: owner of the road type #1
    • m5 bits 4..0: owner of road type #2
    • m7 bits 7..5: road types
    • m7 bits 4..0: owner of road type #3
  • m6 bits 7..6 : Possibility of a bridge above, in the direction specified
  • m6 bits 1..0 : Tropic zone definition
3 Town building
 
  • m1 : Random bits (newhouses)
  • m2 : index into the array of industries
  • m3 bit 7 :
    • set : House is complete
      • m5 : age of House. Maximum been 255, which means 255 years and more
    • clear : House is in construction
      • m5 bits 7..5 : free
      • m5 bits 4..3 : construction stage
      • m5 bits 2..0 : construction counter
  • m3 bit 6 : 9th bit of house type (m4), allowing 512 different types.
  • m3 bits 5..0 : triggers activated (newhouses)
  • m4 : town building type (with m3[6] bit)
  • m5 : see m3 bit 7
  • m6 :
    • If newhouses is activated
      • bits 7..3 : Current animation frame
      • bit 2 : free
    • Standard behaviour
      • bits 7..2 : lift position (for houses type 04 and 05)
    • bits 1..0 : tropic zone specifier
  • m7 :
    • If newhouses is activated
      • Periodic processing time remaining
    • Standard behaviour (only for houses type 04 and 05)
      • bits 7..4 : free
      • bits 3..1 : lift destination. Values can be 0..6, except 1.
        So the building has 6 effective floors. This is due to the fact that the first floor is 2 'normal' floors high.
        One 'normal' floor has a height of 6 lift positions.
      • bit 0 : Lift has destination when set
Newhouses is the name englobing a newGRF feature developped by TTDPatch devs (mainly Csaboka).
It allows the replacement of the properties as well as the graphics of houses in the game.
To distinguish between the standard behaviour and the newGRF one, HouseID (m4 + m3[6]) is tested for anything above 110.
110 is the count of standard houses. So above 110 means there is a new definition of at least one house
4 Trees
 
  • m1: owner (normally 10)
  • m2 bits 5..4:
    0  on grass
    1  on rough land
    2  on snow or desert; m2 bits 7..6 - amount of snow or desert (for desert always set to 3 in TTD)
  • m2 bits 3..0: update counter, incremented on every periodic processing.
    on wraparound the growth status is updated (or, if it's 3, a random action is taken)
  • m3 bits 7..0: type of trees:
    00..0B  temperate climate trees
    0C..13  sub-arctic climate trees
    14..1A  rainforest trees
    1B cactus plants
    1C..1F  sub-tropical climate, non-rainforest, non-desert trees
    20..28  toyland trees
    Note: the actually displayed set of trees depends on both type and number of trees
  • m4 bits 7..5: type of hedge on the SW border of the tile (1 through 6, or 0=none)
  • m4 bits 4..2: type of hedge on the SE border of the tile (1 through 6, or 0=none)
  • m5 bits 7..6: number of trees minus one
  • m5 bits 2..0: growth status:
    0..2  one of trees is growing 
    3  all trees are fully grown 
    4..6  one of trees is withering 
  • m6 bits 1..0 : Tropic zone definition
5 Station tiles
 
  • m1: owner of the station
  • m2: index into the array of stations
  • m3 bits 7..4: persistent random data for newstations
  • m3 bits 3..0: track type for railway stations, must be 0 for all the other stations
  • m4: custom station id; 0 means standard graphics
  • m5: tile type:
    00..07  railway station
    00..01  open platform
    02..03  open platform with station building
    04....07  roofed platform
    bit 0: clear = in X direction, set = in Y direction
    08..33  large airport
    0B  pad 1
    16..19  runway middle
    1A  runway ending
    1C  control tower
    20  hangar
    21  pad 3
    22  pad 2
    27..32  radar (animated)
    33  transmitter
    The initial layout of a large airport is (rows in Y direction, columns in X direction):
    1F 1B 1E 33 26 1A
    09 24 0B 0C 0D 16
    21 1D 23 0E 0F 17
    09 22 0D 11 10 18
    09 08 14 13 12 19
    20 0A 15 1C 27 1A
    
    34..41  small airport
    3A..3D  field with the wind meter (animated)
    3E  runway south ending
    3F  runway middle
    40  runway north ending
    41  hangar
    The initial layout of a small airport is (rows in Y direction, columns in X direction):
    36 3A 40
    35 39 3F
    34 38 3F
    41 37 3E
    
    42 heliport
    43..46  lorry loading area : exit towards:
    43  NE
    44  SE
    45  SW
    46  NW
    47..4A  bus station : exit towards:
    47  NE
    48  SE
    49  SW
    4A  NW
    4B oilfield
    4C..51  ship dock
    4C  SW coast part
    4D  NW coast part
    4E  NE coast part
    4F  SE coast part
    50  X direction water part
    51  Y direction water part
    52 buoy
    53..A7  used by RichK's larger airports
  • m6 bit 3: 1 when a drive through road stop is built over a town owned road, otherwise 0
  • m6 bits 1..0 : Tropic zone definition
6 Water
 
  • m1: owner (for water and coasts normally 11)
  • m5: tile type:
    00  water
    01  coast or riverbank
    10..1B  canal locks
    10  middle part, (SW-NE direction)
    11  middle part, (NW-SE direction)
    12  middle part, (NE-SW direction)
    13  middle part, (SE-NW direction)
    14  lower part, (SW-NE direction)
    15  lower part, (NW-SE direction)
    16  lower part, (NE-SW direction)
    17  lower part, (SE-NW direction)
    18  upper part, (SW-NE direction)
    19  upper part, (NW-SE direction)
    1A  upper part, (NE-SW direction)
    1B  upper part, (SE-NW direction)
    80..83  ship depots
    80  ship depot, NE part (X direction)
    81  ship depot, SW part (X direction)
    82  ship depot, NW part (Y direction)
    83  ship depot, SE part (Y direction)
  • m6 bits 7..6 : Possibility of a bridge above, in the direction specified
  • m6 bits 1..0 : Tropic zone definition
7 Void
  Tiles of this class form an invisible, one tile wide border at the south (bottom) edges of the map,
so as to protect several algorithms from the consequences of a wraparound at the edges.
8 Industry tile
 
  • m1 bit 7: clear = under construction
    • m1 bits 4..2: construction counter, for buildings under construction incremented on every periodic tile processing
    • m1 bits 1..0: stage of construction (3 = completed), incremented when the construction counter wraps around
      the meaning is different for some animated tiles which are never under construction (types 01, 1E..20, 30, 58; see above)
  • m2: index into the array of industries
  • m5: type:
    (note: this is not the same as the industry type, which is stored in the array of industries)
    00..06  coal mine
    00  wheel tower when not animated
    01  wheel tower when animated
    animation state in m3 bits 5..0; m3 bit 6 set = sound already generated
    07..0A  power station
    08  chimney
    0A  transformer; animation progress in m3(valid range 0..7)
    0B..0F  sawmill
    10..11  forest
    11  trees cut down
    12..17  oil refinery
    18..1C  oil rig
    1D..20  oil wells
    1D  not animated
    1E..20  various stages of animation; progress of animation in m3
    21..26  farm
    27..2A  factory (temperate climate)
    2B..2E  printing works
    2F..33  copper ore mine
    2F  wheel tower when not animated
    30  wheel tower when animated; animation state in m3 bits 5..0; m3 bit 6 set = sound already generated
    31  chimney
    34..39  steel mill
    3A..3B  bank (temperate climate)
    3C..3F  food processing plant
    40..47  paper mill
    48..58  gold mine
    4F  wheel tower when not animated
    58  wheel tower when animated; animation state in m3 bits 5..0; m3 bit 6 set = sound already generated
    59..5A  bank (sub-arctic or sub-tropical climate)
    5B..63  diamond mine
    64..73  iron ore mine
    74 fruit plantation
    75 rubber plantation
    76..77  water supply
    78 water tower
    79..7C  factory (sub-tropical climate)
    7D..80  lumber mill
    81..82  candyfloss forest
    82  candyfloss 'trees' cut down
    83..86  sweet factory
    87..88  battery farm
    88  batteries 'reaped'
    89 cola wells
    8A..8D  toy shop
    8E..93  toy factory
    8F  Animated part; animation state in m3 (valid range 00..31)
    Tile animation is started (m4 zeroed) on the periodic processing.
    While the animation is in progress, m4 holds the number of animation cycles that have already taken place.
    when this number reaches 8 the animation is stopped.
    94..9B  plastic fountains (various stages of cyclic animation)
    9C..9F  fizzy drink factory
    A0..A3  bubble generator
    A1  generators
    A2  bubble capture facility; animation state in m3 (valid range 00..27)
    A4..A6  toffee quarry
    A5  animated part; animation state in m3 (valid range 00..45)
    A7..AE  sugar mine
    AE  animated part; animation state in m3 (valid range 00..5F)
  • m6 bits 1..0 : Tropic zone definition
9 Tunnel / bridge
 
  • m5 bits 7..4 clear: tunnel entrance/exit
    • m1: owner of the tunnel
    • m3 bits 3..0 = track type for railway tunnel, must be 0 for road tunnel
    • m4 bit 7 set = on snow or desert
    • m5 bits 3..2: 0 - railway tunnel, 1 - road tunnel
    • m5 bits 1..0 - direction: entrance towards: 0 = NE, 1 = SE, 2 = SW, 3 = NW
  • m5 bit 7 set: bridge ramp
    • m1: owner of the bridge
    • m2 bits 7..4: bridge type:
      Type  Max. speed (mph)  Description
      0  20 wooden
      1  30 concrete
      2  40 girder, steel
      3  50 suspension, concrete
      4  60 suspension, steel
      5  70 suspension, steel
      6  100 cantilever, steel
      7  130 cantilever, steel
      8  150 cantilever, steel
      9  160 girder, steel
      A  200 tubular, steel
    • m3 bits 3..0 = type of track on the bridge, must be 0 for road bridge
    • m4 bit 7 set = on snow or desert
    • m5 bits 3..2: 0 - railway bridge, 1 - road bridge
    • m5 bits 1..0: DiagDirection onto the bridge
  • m6 bits 7..6 : Possibility of a bridge above, in the direction specified
  • m6 bits 1..0 : Tropic zone definition
A Unmovables
 
  • m1 : owner of the object (for lighthouses and transmitters normally 10)
  • m2 :
    • for company statue (m5 = 02), TownID on which the statue is built in
  • m5 : tile type:
    00  transmitter
    01  lighthouse
    02  company statue
    03  company-owned land
    80..93  company headquarters (5 sets of 4 tiles each, updated quarterly depending on the company performance)
  • m6 bits 7..6 : Possibility of a bridge above, in the direction specified
  • m6 bits 1..0 : Tropic zone definition
Classes B through F are reserved. The presence of a tile in one of the reserved classes will crash OTTD.

Original Copyright © 2003 by Marcin Grzegorczyk for TTDLX.
Transport Tycoon and Transport Tycoon Deluxe are Copyright © by Chris Sawyer.
All the other trademarks are the property of their respective owners.