World Map Ground Types

On the world map, triangles will have different ground types that determine which encounter table their encounters pull from and whether the player can occupy them depending on their current state and current mount/vehicle.

Table

This table was stolen from https://wiki.ffrtt.ru/index.php/FF7/WorldMap_Module

ID	Name	Description
0	Grass	Most things can go here.
1	Forest	No landing here, but anything else goes.
2	Mountain	Chocobos and flying machines only.
3	Sea	Deep water, only gold chocobo and submarine can go here.
4	River Crossing	Buggy, tiny bronco and water-capable chocobos.
5	River	Tiny bronco and chocobos.
6	Water	Shallow water, same as above.
7	Swamp	Midgar zolom can only move in swamp areas.
8	Desert	No landing.
9	Wasteland	Found around Midgar, Wutai and misc other. No landing.
10	Snow	Leaves footprints, no landing.
11	Riverside	Beach-like area where river and land meet.
12	Cliff	Sharp drop, usually where the player can be on either side.
13	Corel Bridge	Tiny bridge over the waterfall from Costa del Sol to Corel.
14	Wutai Bridge	Rickety rope bridges south of Wutai.
15	Unused	Doesn't seem to be used anywhere in the original data.
16	Hill side	This is the tiny walkable part at the foot of a mountain.
17	Beach	Where land and shallow water meets.
18	Sub Pen	Only place where you can enter/exit the submarine.
19	Canyon	The ground in cosmo canyon has this type, walkability seems to be the same as wasteland.
20	Mountain Pass	The small path through the mountains connecting Costa del Sol and Corel.
21	Unknown	Present around bridges, may have some special meaning.
22	Waterfall	River type where the tiny bronco can't go.
23	Unused	Doesn't seem to be used anywhere in the original data.
24	Gold Saucer Desert	Special desert type for the golden saucer.
25	Jungle	Walkability same as forest, used in southern parts of the map.
26	Sea (2)	Special type of deep water, only used in one small spot next to HP-MP cave, possibly related to the underwater map/submarine.
27	Northern Cave	Inside part of the crater, where you can land the highwind.
28	Gold Saucer Desert Border	Narrow strip of land surrounding the golden saucer desert. Probably related to the "quicksand" script.
29	Bridgehead	Small area at both ends of every bridge. May have some special meaning.
30	Back Entrance	Special type that can be set unwalkable from the script.
31	Unused	Doesn't seem to be used anywhere in the original data.

Walkability

This section details the walkability conditions of each form the player can take. Essentially, a triangle being walkable means that it's legal ground that the player can occupy normally. The player will be pushed away from moving onto unwalkable triangles, and the player will be stuck if they find themselves in an unwalkable triangle.

The function that computes walkability for the player is at address 74CECA on the PC version.

"Exiting" means that the player is about to exit the vehicle, and a check is being performed to ensure the ground they will exit onto is valid. These checks are performed by the vehicle being exited instead of by the new player entity.

"On Bridge" means that the player is on currently standing on a Corel Bridge or Wutai Bridge triangle. This usually restricts the ground they are allowed to move onto to only be bridges or bridgeheads, which transition the player off the bridge. This is why the player doesn't simply walk off the side of the bridge onto the ground below if they were to try to walk off a bridge.

Human (Cloud / Tifa / Cid)

ID	Type	Normal	On Bridge
0	Grass	✓
1	Forest	✓
2	Mountain
3	Sea
4	River Crossing
5	River
6	Water
7	Swamp	✓
8	Desert	✓
9	Wasteland	✓
10	Snow	✓
11	Riverside	✓
12	Cliff
13	Corel Bridge	✓	✓
14	Wutai Bridge	✓	✓
15	Unused
16	Hill side	✓
17	Beach	✓
18	Sub Pen
19	Canyon	✓
20	Mountain Pass	✓
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert
25	Jungle	✓
26	Sea (2)
27	Northern Cave
28	Gold Saucer Desert Border	✓
29	Bridgehead	✓	✓
30	Back Entrance	✓
31	Unused

Highwind

The Highwind does not check the current ground type if it is not landing and the player is not exiting it.

The player cannot exit the Highwind onto a Script-7 triangle.

ID	Type	Exiting	Landing
0	Grass	✓	✓
1	Forest	✓
2	Mountain
3	Sea
4	River Crossing
5	River
6	Water
7	Swamp	✓
8	Desert	✓
9	Wasteland	✓
10	Snow	✓
11	Riverside	✓
12	Cliff
13	Corel Bridge	✓
14	Wutai Bridge	✓
15	Unused
16	Hill side	✓
17	Beach	✓
18	Sub Pen
19	Canyon	✓
20	Mountain Pass	✓
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert
25	Jungle	✓
26	Sea (2)
27	Northern Cave
28	Gold Saucer Desert Border
29	Bridgehead
30	Back Entrance
31	Unused

Wild Chocobo

Wild Chocobos are handled separately from tamed Chocobos in the function.

The player cannot dismount a Wild Chocobo onto a Script-7 triangle.

ID	Type	Normal / Exiting	Normal / Exiting On Bridge
0	Grass	✓
1	Forest	✓
2	Mountain
3	Sea
4	River Crossing
5	River
6	Water
7	Swamp	✓
8	Desert	✓
9	Wasteland	✓
10	Snow	✓
11	Riverside	✓
12	Cliff
13	Corel Bridge	✓	✓
14	Wutai Bridge	✓	✓
15	Unused
16	Hill side	✓
17	Beach	✓
18	Sub Pen
19	Canyon	✓
20	Mountain Pass	✓
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert
25	Jungle	✓
26	Sea (2)
27	Northern Cave
28	Gold Saucer Desert Border	✓
29	Bridgehead	✓	✓
30	Back Entrance
31	Unused

Tiny Bronco

There is an apparently-unused check for if the "Highwind Mode" flag is set. It appears to allow the Tiny Bronco to traverse over all ground types and land on shallow water types in a manner like the Highwind.

ID	Type	Normal	Exiting
0	Grass
1	Forest
2	Mountain
3	Sea
4	River Crossing	✓
5	River	✓
6	Water	✓
7	Swamp
8	Desert
9	Wasteland
10	Snow
11	Riverside		✓
12	Cliff
13	Corel Bridge
14	Wutai Bridge
15	Unused
16	Hill side
17	Beach		✓
18	Sub Pen
19	Canyon
20	Mountain Pass
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert
25	Jungle
26	Sea (2)
27	Northern Cave
28	Gold Saucer Desert Border
29	Bridgehead
30	Back Entrance
31	Unused

Buggy

The player cannot exit the Buggy onto a Script-7 triangle.

ID	Type	Normal	Exiting
0	Grass	✓	✓
1	Forest	✓	✓
2	Mountain
3	Sea
4	River Crossing	✓
5	River
6	Water
7	Swamp		✓
8	Desert	✓	✓
9	Wasteland	✓	✓
10	Snow	✓	✓
11	Riverside	✓	✓
12	Cliff
13	Corel Bridge	✓	✓
14	Wutai Bridge	✓	✓
15	Unused
16	Hill side	✓	✓
17	Beach	✓	✓
18	Sub Pen
19	Canyon	✓	✓
20	Mountain Pass	✓	✓
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert	✓
25	Jungle	✓	✓
26	Sea (2)
27	Northern Cave
28	Gold Saucer Desert Border	✓
29	Bridgehead	✓
30	Back Entrance
31	Unused

Cargo Ship

The ship in the cutscene while going from Junon to Costa del Sol.

ID	Type	Normal
0	Grass
1	Forest
2	Mountain
3	Sea	✓
4	River Crossing
5	River
6	Water
7	Swamp
8	Desert
9	Wasteland
10	Snow
11	Riverside
12	Cliff
13	Corel Bridge
14	Wutai Bridge
15	Unused
16	Hill side
17	Beach
18	Sub Pen	✓
19	Canyon
20	Mountain Pass
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert
25	Jungle
26	Sea (2)	✓
27	Northern Cave
28	Gold Saucer Desert Border
29	Bridgehead
30	Back Entrance
31	Unused

Submarine

The player cannot exit the Submarine onto a Script-7 triangle.

ID	Type	Normal	Exiting
0	Grass		✓
1	Forest		✓
2	Mountain
3	Sea	✓
4	River Crossing
5	River
6	Water
7	Swamp		✓
8	Desert		✓
9	Wasteland		✓
10	Snow		✓
11	Riverside		✓
12	Cliff
13	Corel Bridge		✓
14	Wutai Bridge		✓
15	Unused	✓
16	Hill side		✓
17	Beach		✓
18	Sub Pen	✓
19	Canyon		✓
20	Mountain Pass		✓
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert
25	Jungle		✓
26	Sea (2)	✓
27	Northern Cave
28	Gold Saucer Desert Border
29	Bridgehead
30	Back Entrance
31	Unused

Chocobo

The player cannot dismount a Chocobo onto a Script-7 triangle.

ID	Type	Yellow	Green	Blue	Black	Gold	On Bridge	Dismounting	Dismounting on Bridge
0	Grass	✓	✓	✓	✓	✓		✓
1	Forest	✓	✓	✓	✓	✓		✓
2	Mountain		✓		✓	✓
3	Sea					✓
4	River Crossing			✓	✓	✓
5	River			✓	✓	✓
6	Water			✓	✓	✓
7	Swamp	✓	✓	✓	✓	✓		✓
8	Desert	✓	✓	✓	✓	✓		✓
9	Wasteland	✓	✓	✓	✓	✓		✓
10	Snow	✓	✓	✓	✓	✓		✓
11	Riverside	✓	✓	✓	✓	✓		✓
12	Cliff				✓	✓
13	Corel Bridge	✓	✓	✓	✓	✓	✓	✓	✓
14	Wutai Bridge	✓	✓	✓	✓	✓	✓	✓	✓
15	Unused
16	Hill side	✓	✓	✓	✓	✓		✓
17	Beach	✓	✓	✓	✓	✓		✓
18	Sub Pen
19	Canyon	✓	✓	✓	✓	✓		✓
20	Mountain Pass	✓	✓	✓	✓	✓		✓
21	Unknown
22	Waterfall				✓	✓
23	Unused
24	Gold Saucer Desert					✓
25	Jungle	✓	✓	✓	✓	✓		✓
26	Sea (2)					✓
27	Northern Cave
28	Gold Saucer Desert Border	✓	✓	✓	✓	✓		✓
29	Bridgehead	✓	✓	✓	✓	✓	✓	✓	✓
30	Back Entrance
31	Unused

Zolom

The Midgar Zolom also uses this function using a special case.

ID	Type	Normal
0	Grass
1	Forest
2	Mountain
3	Sea
4	River Crossing
5	River
6	Water
7	Swamp	✓
8	Desert
9	Wasteland
10	Snow
11	Riverside
12	Cliff
13	Corel Bridge
14	Wutai Bridge
15	Unused
16	Hill side
17	Beach
18	Sub Pen
19	Canyon
20	Mountain Pass
21	Unknown
22	Waterfall
23	Unused
24	Gold Saucer Desert
25	Jungle
26	Sea (2)
27	Northern Cave
28	Gold Saucer Desert Border
29	Bridgehead
30	Back Entrance
31	Unused