Hi Ticker, I think those are the two that I didn't post before.
Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-boun...@lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkg...@jagit.co.uk> Gesendet: Mittwoch, 22. Dezember 2021 12:32 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] [mkgmap-svn] Commit r572: MDR16 is some kind of codebook. Hi Gerd Can you send me the Mdr16 display of some of the other maps you've been looking at. I'd like to try and find some meaning for bytes 0..2 and the prefix before the level 5 data. Thanks Ticker On Wed, 2021-12-22 at 08:43 +0000, Gerd Petermann wrote: > Hi Ticker, > > I also thought that some bytes may tells us the uncompressed size or > frequencies. I don't see any clear pattern so far... > > Some number for the Adria Topo Map: (Mdr 16 length 212) > Uncompressed size: 1.582.655 (0x18263e) , compressed: 1029077 > (0x0fb3d5) > Frequencies of the tree nodes: > > '' 0x3 freq: 1 (0x1) > '%' 0x25 freq: 1 (0x1) > ':' 0x3a freq: 1 (0x1) _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
--------- MDR 16 (decompression codebook Huffman tree) ------------------------- 0000030e | 000000 | 8e | ??? 0000030f | 000001 | 02 | ??? 00000310 | 000002 | 15 | ??? 00000311 | 000003 | 10 | 1st level with struct: 16 00000312 | 000004 | 0a 08 6d 00 00 | ??? 00000317 | 000009 | 10 | struct level: 16 00000318 | 00000a | 00 | count byte 0, delta = 0 00000319 | 00000b | 06 00 | struct for 16 0000031b | 00000d | 0f | struct level: 15 0000031c | 00000e | 06 | count byte 6, delta = 6 0000031d | 00000f | 14 00 | struct for 15 0000031f | 000011 | 0e | struct level: 14 00000320 | 000012 | 0d | count byte 13, delta = 7 00000321 | 000013 | 38 00 | struct for 14 00000323 | 000015 | 0d | struct level: 13 00000324 | 000016 | 16 | count byte 22, delta = 9 00000325 | 000017 | 70 00 | struct for 13 00000327 | 000019 | 0c | struct level: 12 00000328 | 00001a | 1d | count byte 29, delta = 7 00000329 | 00001b | a0 00 | struct for 12 0000032b | 00001d | 0b | struct level: 11 0000032c | 00001e | 20 | count byte 32, delta = 3 0000032d | 00001f | 00 01 | struct for 11 0000032f | 000021 | 09 | struct level: 9 00000330 | 000022 | 23 | count byte 35, delta = 3 00000331 | 000023 | 00 02 | struct for 9 00000333 | 000025 | 08 | struct level: 8 00000334 | 000026 | 25 | count byte 37, delta = 2 00000335 | 000027 | 00 04 | struct for 8 00000337 | 000029 | 07 | struct level: 7 00000338 | 00002a | 27 | count byte 39, delta = 2 00000339 | 00002b | 00 0c | struct for 7 0000033b | 00002d | 06 | struct level: 6 0000033c | 00002e | 2b | count byte 43, delta = 4 0000033d | 00002f | 00 08 | struct for 6 0000033f | 000031 | 10 09 12 09 12 09 12 09 | ??? 00000347 | 000039 | 12 09 12 09 | 0000034b | 00003d | 0b | prefix b 0000034c | 00003e | 59 | value in tree 'Y' (0x59) 0000034d | 00003f | 0b | prefix b 0000034e | 000040 | 47 | value in tree 'G' (0x47) 0000034f | 000041 | 0b | prefix b 00000350 | 000042 | 49 | value in tree 'I' (0x49) 00000351 | 000043 | 0b | prefix b 00000352 | 000044 | c1 | value in tree 'Ã' (0xc1) 00000353 | 000045 | 0b | prefix b 00000354 | 000046 | 5a | value in tree 'Z' (0x5a) 00000355 | 000047 | 0b | prefix b 00000356 | 000048 | 4b | value in tree 'K' (0x4b) 00000357 | 000049 | 0b | prefix b 00000358 | 00004a | 44 | value in tree 'D' (0x44) 00000359 | 00004b | 0b | prefix b 0000035a | 00004c | 4f | value in tree 'O' (0x4f) 0000035b | 00004d | 0b | prefix b 0000035c | 00004e | 4e | value in tree 'N' (0x4e) 0000035d | 00004f | 09 | prefix 9 0000035e | 000050 | 54 | value in tree 'T' (0x54) 0000035f | 000051 | 09 | prefix 9 00000360 | 000052 | 54 | value in tree 'T' (0x54) 00000361 | 000053 | 09 | prefix 9 00000362 | 000054 | 41 | value in tree 'A' (0x41) 00000363 | 000055 | 09 | prefix 9 00000364 | 000056 | 41 | value in tree 'A' (0x41) 00000365 | 000057 | 09 | prefix 9 00000366 | 000058 | 53 | value in tree 'S' (0x53) 00000367 | 000059 | 09 | prefix 9 00000368 | 00005a | 53 | value in tree 'S' (0x53) 00000369 | 00005b | 09 | prefix 9 0000036a | 00005c | 45 | value in tree 'E' (0x45) 0000036b | 00005d | 09 | prefix 9 0000036c | 00005e | 45 | value in tree 'E' (0x45) 0000036d | 00005f | 09 | prefix 9 0000036e | 000060 | 4c | value in tree 'L' (0x4c) 0000036f | 000061 | 09 | prefix 9 00000370 | 000062 | 4c | value in tree 'L' (0x4c) 00000371 | 000063 | 09 | prefix 9 00000372 | 000064 | 52 | value in tree 'R' (0x52) 00000373 | 000065 | 09 | prefix 9 00000374 | 000066 | 52 | value in tree 'R' (0x52) 00000375 | 000067 | 07 | prefix 7 00000376 | 000068 | 00 | value in tree '
--------- MDR 16 (decompression codebook Huffman tree) ------------------------- 000002a6 | 000000 | 16 | ??? 000002a7 | 000001 | 03 | ??? 000002a8 | 000002 | 15 | ??? 000002a9 | 000003 | 15 | 1st level with struct: 21 000002aa | 000004 | 0f 08 6b 00 00 00 | ??? 000002b0 | 00000a | 15 | struct level: 21 000002b1 | 00000b | 00 | count byte 0, delta = 0 000002b2 | 00000c | 02 00 00 | struct for 21 000002b5 | 00000f | 14 | struct level: 20 000002b6 | 000010 | 02 | count byte 2, delta = 2 000002b7 | 000011 | 08 00 00 | struct for 20 000002ba | 000014 | 12 | struct level: 18 000002bb | 000015 | 05 | count byte 5, delta = 3 000002bc | 000016 | 20 00 00 | struct for 18 000002bf | 000019 | 11 | struct level: 17 000002c0 | 00001a | 08 | count byte 8, delta = 3 000002c1 | 00001b | 40 00 00 | struct for 17 000002c4 | 00001e | 10 | struct level: 16 000002c5 | 00001f | 0a | count byte 10, delta = 2 000002c6 | 000020 | 00 01 00 | struct for 16 000002c9 | 000023 | 0f | struct level: 15 000002ca | 000024 | 10 | count byte 16, delta = 6 000002cb | 000025 | 00 02 00 | struct for 15 000002ce | 000028 | 0e | struct level: 14 000002cf | 000029 | 14 | count byte 20, delta = 4 000002d0 | 00002a | 00 04 00 | struct for 14 000002d3 | 00002d | 0d | struct level: 13 000002d4 | 00002e | 18 | count byte 24, delta = 4 000002d5 | 00002f | 00 0a 00 | struct for 13 000002d8 | 000032 | 0c | struct level: 12 000002d9 | 000033 | 1e | count byte 30, delta = 6 000002da | 000034 | 00 10 00 | struct for 12 000002dd | 000037 | 0b | struct level: 11 000002de | 000038 | 21 | count byte 33, delta = 3 000002df | 000039 | 00 18 00 | struct for 11 000002e2 | 00003c | 0a | struct level: 10 000002e3 | 00003d | 23 | count byte 35, delta = 2 000002e4 | 00003e | 00 20 00 | struct for 10 000002e7 | 000041 | 09 | struct level: 9 000002e8 | 000042 | 24 | count byte 36, delta = 1 000002e9 | 000043 | 00 40 00 | struct for 9 000002ec | 000046 | 08 | struct level: 8 000002ed | 000047 | 26 | count byte 38, delta = 2 000002ee | 000048 | 00 c0 00 | struct for 8 000002f1 | 00004b | 07 | struct level: 7 000002f2 | 00004c | 2a | count byte 42, delta = 4 000002f3 | 00004d | 00 00 02 | struct for 7 000002f6 | 000050 | 06 | struct level: 6 000002f7 | 000051 | 2f | count byte 47, delta = 5 000002f8 | 000052 | 00 0d 1a | struct for 6 000002fb | 000055 | 0d 1c 0e 1c 0e 1c 0e | ??? 00000302 | 00005c | 0b | prefix b 00000303 | 00005d | 55 | value in tree 'U' (0x55) 00000304 | 00005e | 0b | prefix b 00000305 | 00005f | 54 | value in tree 'T' (0x54) 00000306 | 000060 | 0b | prefix b 00000307 | 000061 | 4e | value in tree 'N' (0x4e) 00000308 | 000062 | 0b | prefix b 00000309 | 000063 | 43 | value in tree 'C' (0x43) 0000030a | 000064 | 0b | prefix b 0000030b | 000065 | 44 | value in tree 'D' (0x44) 0000030c | 000066 | 09 | prefix 9 0000030d | 000067 | 4f | value in tree 'O' (0x4f) 0000030e | 000068 | 09 | prefix 9 0000030f | 000069 | 4f | value in tree 'O' (0x4f) 00000310 | 00006a | 09 | prefix 9 00000311 | 00006b | 4c | value in tree 'L' (0x4c) 00000312 | 00006c | 09 | prefix 9 00000313 | 00006d | 4c | value in tree 'L' (0x4c) 00000314 | 00006e | 09 | prefix 9 00000315 | 00006f | 53 | value in tree 'S' (0x53) 00000316 | 000070 | 09 | prefix 9 00000317 | 000071 | 53 | value in tree 'S' (0x53) 00000318 | 000072 | 09 | prefix 9 00000319 | 000073 | 41 | value in tree 'A' (0x41) 0000031a | 000074 | 09 | prefix 9 0000031b | 000075 | 41 | value in tree 'A' (0x41) 0000031c | 000076 | 09 | prefix 9 0000031d | 000077 | 49 | value in tree 'I' (0x49) 0000031e | 000078 | 09 | prefix 9 0000031f | 000079 | 49 | value in tree 'I' (0x49) 00000320 | 00007a | 09 | prefix 9 00000321 | 00007b | 00 | value in tree '
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