• map5 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 map3_lo bits 3..0 (legal values: 0 through 9)
  10	1/4 snow
  11	2/4 snow
  12	3/4 snow
  13	full snow
  15	partial desert
  17	full desert

• map5 bits 7..6: update counter, incremented on every periodic processing for tile types other than 03, 07, 0B and 10 and above, on wraparound the tile is updated (for fields, the type of fields in map3_lo is increased, for other types the tile type in map5 is increased)
  (for snow and desert, these bits are not used, tile is updated on every periodic processing)
• map_owner: owner of the tile (normally 10)
• map3_hi bits 7..5: type of hedge on the SW border of the tile (1 through 6, or 0=none); bits 4..2: same for the SE border

• map5 bits 0..5: 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)

• map5 bit 6 set = with signals:
  • map3_lo 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

  • map2 bits 7..4: bit clear = signal shows red; same bits as in map3_lo
  • OpenTTD bits in map3_hi:

    bits 1..0:	type of signal:
    00:	normal signals
    01:	pre-signals
    10:	exit-signals
    11:	combo-signals
    bit 2:	set = semaphore signals, clear = light signals

• map_owner: owner of the track
• map2 bits 0..3:

  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

• map3_lo bits 0..3 = track type: 0 - conventional railway, 1 - monorail, 2 - maglev

• map5 value C0..C3: railway depot
  map5 bits 1..0 - direction: exit towards: 00 = NE, 01 = SE, 02 = SW, 03 = NW
• map5 value C4..C5: checkpoint
  bit 0: clear = in X direction, set = in Y direction
  
  
• map_owner: owner of the depot / checkpoint
• map3_lo bits 0..3 = track type

• map5 bits 3..0: road layout: bit set = road piece present:

  bit 0:	NW piece
  bit 1:	SW piece
  bit 2:	SE piece
  bit 3:	NE piece

• map_owner: owner of the road
• map2 bits 0..2: 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
• map3_hi bit 7 set = on snow or desert

• map5 bit 3: clear - road in the X direction, set - road in the Y direction (railway track always perpendicular)
• map5 bit 2: set if crossing lights are on
• map_owner: owner of the railway track
• map2 bits 0..2: 0 - on bare land, 1 - on grass, 2 or higher - paved
• map3_lo bits 0..7: owner of the road
• map3_hi bits 3..0: track type
• map3_hi bit 7 set = on snow or desert

• map5 bits 3..0 - direction: exit towards: 0 = NE, 1 = SE, 2 = SW, 3 = NW
• map_owner: owner of the depot
• map3_hi bit 7 set = on snow or desert (not displayed, but set internally)

• map2: town building type:

  Note: In the climate list, 'sub-arctic' means below the snow line, and 'snow' means above the snow line in the sub-arctic climate.

  Type	Size	Climates	Description
  00	1×1	temperate	tall office block
  01	1×1	temperate	office block
  02	1×1	temperate	small block of flats
  03	1×1	temperate	church
  04	1×1	temperate, sub-arctic, sub-tropical	large office block
  05	1×1	snow	large office block
  06	1×1	temperate	town houses
  07..08	1×2	temperate	hotel
  09	1×1	temperate, sub-arctic, sub-tropical	statue
  0A	1×1	temperate, sub-arctic, sub-tropical	fountain
  0B	1×1	temperate	park (with a pond)
  0C	1×1	temperate	park (with an alley)
  0D	1×1	temperate	office block
  0E..10	1×1	temperate	various types of shops and offices
  11	1×1	temperate, sub-arctic, sub-tropical	modern office building
  12	1×1	temperate	warehouse
  13	1×1	temperate	office block (with spiral stairway on the side)
  14..17	2×2	temperate	stadium
  18	1×1	temperate	old houses
  19	1×1	temperate	cottages
  1A	1×1	temperate	houses
  1B	1×1	temperate	flats
  1C	1×1	temperate	tall office block
  1D	1×1	temperate	shops and offices
  1E	1×1	temperate, sub-tropical	shops and offices
  1F	1×1	temperate	theatre
  20..23	2×2	temperate, sub-arctic, sub-tropical	stadium (modern style)
  24	1×1	temperate, sub-arctic, sub-tropical	offices (the modern 'vertical tube' style)
  25	1×1	sub-arctic	houses
  26	1×1	snow	houses
  27	1×1	temperate	cinema
  28..2B	2×2	temperate	shopping mall
  2C	1×1	sub-arctic	flats
  2D	1×1	snow	flats
  2E	1×1	sub-arctic	houses
  2F	1×1	snow	houses
  30	1×1	sub-arctic	houses
  31	1×1	snow	houses
  32	1×1	sub-arctic, sub-tropical	tall office block
  33	1×1	snow	tall office block
  34	1×1	sub-arctic	tall office block
  35	1×1	snow	tall office block
  36	1×1	sub-arctic, sub-tropical	tall office block
  37	1×1	snow	tall office block
  38	1×1	sub-arctic	houses
  39	1×1	snow	houses
  3A	1×1	sub-arctic	shops and offices
  3B	1×1	snow	shops and offices
  3C	1×1	sub-arctic	church
  3D	1×1	snow	church
  3E	1×1	sub-arctic	houses
  3F	1×1	snow	houses
  40	1×1	sub-arctic	shops and offices
  41	1×1	snow	shops and offices
  42..43	1×2	sub-arctic	hotel
  44..45	1×2	snow	hotel
  46	1×1	sub-arctic, sub-tropical	shops and offices
  47	1×1	snow	shops and offices
  48	1×1	sub-arctic	tall office block
  49	1×1	snow	tall office block
  4A..4B	2×1	sub-arctic	tall office block
  4C..4D	2×1	snow	tall office block
  4E	1×1	sub-tropical	houses (with a tree in a corner)
  4F, 50	1×1	sub-tropical	houses
  51	1×1	sub-tropical	houses (suburb-type)
  52	1×1	sub-tropical	flats
  53	1×1	sub-tropical	church
  54	1×1	sub-tropical	houses (with two trees in front)
  55, 56	1×1	sub-tropical	flats
  57..58	2×1	sub-tropical	tall office block
  59	1×1	sub-tropical	flats
  5A	1×1	sub-tropical	tall office block
  5B	1×1	toyland	church
  5C..61	1×1	toyland	various types of toyland houses
  62	1×1	toyland	tall office block
  63..64	1×2	toyland	houses ('shoe' style)
  65	1×1	toyland	tall office block
  66	1×1	toyland	igloo
  67	1×1	toyland	tepees
  68, 69	1×1	toyland	shops and offices
  6A	1×1	toyland	tall office block
  6B	1×1	toyland	statue
  6C	1×1	toyland	teapot-house
  6D	1×1	toyland	piggy-bank

• map3_lo bits 7..6: stage of construction (3 = completed)
• map5 bits 2..0: construction counter, for buildings under construction incremented on every periodic tile processing, on wraparound the stage of construction in map3_lo is increased
• for large office blocks (types 04 and 05):
  • map_owner bits 6..0: position of the lift
  • map_owner bit 7: if set the lift is moving
  • map5 bit 7: if set then map5 bits 5..0 hold the final position of the lift divided by 6 (valid values 0..6 except 1)

• map5 bits 7..6: number of trees minus one
• map5 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
• map3_lo 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)
• map3_hi bits 7..5: type of hedge on the SW border of the tile (1 through 6, or 0=none)
• map3_hi bits 4..2: type of hedge on the SE border of the tile (1 through 6, or 0=none)
• map2 bits 5..4:

  0	on grass
  1	on rough land
  2	on snow or desert; map2 bits 7..6 - amount of snow or desert (for desert always set to 3 in TTD)

• map2 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)
• map_owner: owner (normally 10)

• map5: 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

• map_owner: owner of the station
• map2: index into the array of stations
• map3_lo bits 0..3: track type for railway stations, must be 0 for all the other stations

• map5: 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)

• map_owner: owner (for water and coasts normally 11)

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.

• map5: type:
  (note: this is not the same as the industry type stored in the array of industries)

  00..06	coal mine 00  wheel tower when not animated 01  wheel tower when animated; animation state in map_owner bits 5..0; map_owner bit 6 set = sound already generated
  07..0A	power station 08  chimney 0A  transformer; animation progress in map_owner bits 5..2 (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 map_owner bits 1..0
  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 map_owner bits 5..0; map_owner 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 map_owner bits 5..0; map_owner 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 map3_lo (valid range 00..31) tile animation is started (map3_hi zeroed) on the periodic processing if field 2C in the corresponding industry array entry is nonzero while the animation is in progress (see the array at 04328) map3_hi 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 map3_lo (valid range 00..27)
  A4..A6	toffee quarry A5  animated part; animation state in map3_lo (valid range 00..45)
  A7..AE	sugar mine AE  animated part; animation state in map3_lo (valid range 00..5F)

• map2: index into the array of industries
• map_owner bit 7: clear = under construction
  • map_owner bits 4..2: construction counter, for buildings under construction incremented on every periodic tile processing
• map_owner 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)

• map5 bits 3..2: 0 - railway tunnel, 1 - road tunnel
• map5 bits 1..0 - direction: entrance towards: 0 = NE, 1 = SE, 2 = SW, 3 = NW
• map_owner: owner of the tunnel
• map3_lo bits 3..0 = track type for railway tunnel, must be 0 for road tunnel
• map3_hi bit 7 set = on snow or desert

• map5 bit 6 clear: bridge ending
  • map5 bit 5: clear - northern, set - southern ending
  • map3_lo bits 3..0 = type of track on the bridge, must be 0 for road bridge
  • map_owner: owner of the bridge
  map5 bit 6 set: bridge middle part
  • map5 bit 5 clear:
    • map5 bits 4..3: land under bridge: 0 - grass, snow or desert, 1 - water
    map5 bit 5 set:
    • map5 bits 4..3: transport route under bridge: 0 - railway, 1 - road
  • map3_lo bits 7..4 = type of track on the bridge, must be 0 for road bridge
  • map3_lo bits 3..0 = type of track under the bridge, if any
  • map2 bits 3..0: bridge piece (0..5)
  • map_owner: owner of the land under bridge
• map5 bits 2..1: 0 - railway bridge, 1 - road bridge
• map5 bit 0: clear - bridge in the X direction, set - bridge in the Y direction
• map2 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

• map3_hi bit 7 set = on snow or desert

• map5: 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)

• map_owner: owner of the object (for lighthouses and transmitters normally 10)