Map structure

Map Structure

Maps in Pokemon Diamond and Pearl are stored in fielddata\landdata directory. List of Maps

Each map is divided in four parts

The first 0x10 bytes give the sizes of each section as such:

Location	Description
0x00	Permission Size
0x04	Object Size
0x08	Model size
0x0c	BDHC size

FIRST PART- MOVEMENT PERMISSION

First part represents movement permission. It's length depends from maps and is characterized by a sequence of XX YY XX YY ...

XX = special permissions

YY = movement flag

Here's a table of the movement flags represented as hex bytes:

Hex Value	Movement type	Game
00	Any Movement	HGSS/ DPPt
04	No special permissions	HGSS
80	No movement	HGSS/ DPPt

Here's a table of special permissions represented as hex bytes:

Hex Value (decimal)	Movement type
00	Free passage
02	Grass
03	High Grass
04-09	Free passage
10-12	Surfing
13	Waterfall
14-15	Surfing
16	Go down 1
17	Water on the foots?
18	Free passage
19	Surfing
1A-1B	Free passage
1C	Go down
1D-20	Free passage
21	Foot on sand
22	Surfing
23-29	Free passage
2A	Surfing
2B-32	Free passage
33	Blocked
34-35	Free passage
36-37	Blocked
38-39	Free passage
3A	Jump up 1
3B	Jump under 1
3C-3F	Free passage
40	Rotate right
41	Rotate left
42	Rotate up
43	Rotate down
44-48	Free passage
49	Blocked
4A	Free passage
4B	Rock Climb
4C-4F	Free passage
50-53	Surfing
54-5D	Free passage
5E	Stairs down
5F	Stairs up
60-63	Free passage
64	Go in without animation door
65	Go out of building
66	Free passage
67	Jump and transport in building
68	Free passage
69	Doors opening
6A-6D	Free passage
6E	Go in without animation door
6F-70	Free passage
71	Be on bike
72	Free passage
73	Surfing
74-77	Free passage
78	Surfing
79-7B	Free passage
7C	Surfing
7D-82	Free passage
83	Open pc
84	Free passage
85	Open map sinnoh
86	Battle Watch(Tv program)
87-A0	Free passage
A1	Hiro under snow(Middle)
A3	Hiro under snow(Only hat out)
A4	Hiro under mug(middle)
A5	Hiro under mug(only hat out)
A6	Grass mug
A7	Under grass mug
A9	Snow low
AA-D2	Free passage
D3-D9	Ride jump left
DB	Ride bike
DC-DF	Free passage
E0	It’s lined with Pokémon picture books
E1	It’s full of Pokemon book
E2	Pokémon magazines!
E4	The trash can is empty.
E5	The shelves are jammed with colourful Pokémon Goods
E6-EA	Nothing
EB	There's a ton of convenient item...
EC	The shelves brin....
ED-FF	Free passage

SECOND PART- 3D OBJECTS

In this parts we find 3d objects that are showed in the map. We find a sequence of 0x30 hex number in which we find all information of objects

Hex Value (decimal)	Explanation
0x00-0x01	Model number
0x05-0x08	X coordinates
0x0A-0x0C	Y coordinates
0x0E-0x10	Z coordinates
0x1E	Model widht
0x22	Model height
0x25	Model lenght

For more information, go to Model list

THIRD PART- NSBMD MODEL MAP

The NSBMD format will have its own page. NSBMD

FOURTH PART- BDHC

Currently the BDHC is known to have two parts. The first part controls base height of entire map. The second part only exists in maps with changes in height (e.g. stairs).