User:MPC/LBL Subfile Format

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User:MPC

A reverse-engineering of Garmin's LBL Subfile format

LBL Header

Byte Offset Length (bytes) Description Notes
Header 0x000 2 LBL Header length.
0x002 19 Garmin Common Header The ID-String will be "GARMIN LBL"
LBL1 0x015 4 Offset
0x019 4 Length
0x01d 2 Data label offset multiplier
0x01e 1 Label coding type 0x06, 0x09 and 0x0a have been seen
LBL2
Countries
0x01f 4 Offset
0x023 4 Length
0x027 2 Record size
0x029 4 Flags
LBL3
Regions
0x02d 4 Offset
0x031 4 Length
0x035 2 Record size
0x037 4 Flags
LBL4
Cities
0x03b 4 Offset
0x03f 4 Length
0x043 2 Record size
0x045 4 Flags
LBL5
POI index
0x049 4 Offset
0x04d 4 Length
0x051 2 Record size
0x053 4 Flags
LBL6
POI properties
0x057 4 Offset
0x05b 4 Length
0x05f 1 Offset multiplier
0x060 1 Global mask
0x061 3 Unknown
LBL7
POI types
0x064 4 Offset
0x068 4 Length
0x06c 2 Record size
0x06e 4 Flags
LBL8
ZIPs
0x072 4 Offset
0x076 4 Length
0x07a 2 Record size
0x07c 4 Flags
LBL9
Highways
0x080 4 Offset
0x084 4 Length
0x088 2 Record size
0x08a 4 Flags
LBL10
Exits
0x08e 4 Offset
0x092 4 Length
0x096 2 Record size
0x098 4 Flags
LBL11
Highway data
0x09c 4 Offset
0x0a0 4 Length
0x0a4 2 Record size
0x0a6 4 Flags
0x0aa 2 Codepage 0xe4 0x04 = 1252 has been spotted
0x0ac 4 Unknown (flags?)

tbc...

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