Hi Carlos, see https://files.mkgmap.org.uk/detail/542 Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <carlos@alternativaslibres.org> Gesendet: Dienstag, 28. Dezember 2021 16:36 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help Could you provide display.jar binary? I can't find it in the web, sorry. El 28/12/21 a las 15:55, Gerd Petermann escribió:

Hi all,

those who have original garmin maps for the PC and know how to compile display tool: Update to r575 or higher. Please execute the program MdrDisplay on the global index of the map (e.g mdrmap.img) like this: java -ea -Xmx6800m -cp d:\display\dist\display.jar;d:\mkgmap\dist\mkgmap.jar test.display.MdrDisplay MDRMAP.img --print=16 > mdr16.txt

(fix the paths to the two jar files, replace the ; by : on linux)

The expected result is a rather small text file (~32k) or a crash. Please reply with your results, possibly zipped. I am esp. interested in crashes, but good data also might help to understand a few missing bits.

This is about a compression algorithm that is used in some old Garmin maps and I plan to implement that in mkgmap to reduce file size of the global index file.

I've attached a sample output for the Adria Topo 2.4 map.

Gerd

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Hi Nick, thanks, the mdr file looks like a very early version with a very different structure. Should help to understand the remaining bits :) Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:00 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help Hi Gerd I have done a few for you, including one which causes a java error so added the mdr https:\pinns.co.uk\2812\mdrmap.zip Wishing you and Ticker every success! Great Job ! r Nick On 28/12/2021 14:55, Gerd Petermann wrote:

java -ea -Xmx6800m -cp d:\display\dist\display.jar;d:\mkgmap\dist\mkgmap.jar test.display.MdrDisplay MDRMAP.img --print=16 > mdr16.txt

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Hi Nick, yes, and esp. those MDR 16 which do not have a 0x15 at offset 2 like in this example: 000003fa | 000000 | aa 04 15 1b 15 08 cf 00 | record 0 (len: 300, 0x12c) Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:21 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help Hi Gerd Great but as you confusing, although typically Garmin ;) I noticed some are called map_mdr.img. I'll check some other pc s tomorrow; I suppose you are specifically looking for mdr16 Nick On 28/12/2021 18:17, Gerd Petermann wrote:

Hi Nick,

thanks, the mdr file looks like a very early version with a very different structure. Should help to understand the remaining bits :)

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:00 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Gerd

I have done a few for you, including one which causes a java error so added the mdr

https:\pinns.co.uk\2812\mdrmap.zip

Wishing you and Ticker every success! Great Job !

r

Nick

On 28/12/2021 14:55, Gerd Petermann wrote:

...

java -ea -Xmx6800m -cp d:\display\dist\display.jar;d:\mkgmap\dist\mkgmap.jar test.display.MdrDisplay MDRMAP.img --print=16 > mdr16.txt

---

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Hi Nick Thanks. Interesting, but not maybe not relevant to the Huffman stuff, in mdr16austria.txt the MDR headers go out of sync after MDR30 Ticker On Tue, 2021-12-28 at 18:28 +0000, nick wrote:

Hi Gerd

OK thanks will check that tomorrow.

I think it's amazing how far both of you got.

Nick

On 28/12/2021 18:26, Gerd Petermann wrote:

...

Hi Nick,

yes, and esp. those MDR 16 which do not have a 0x15 at offset 2 like in this example: 000003fa | 000000 | aa 04 15 1b 15 08 cf 00 | record 0 (len: 300, 0x12c)

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:21 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Gerd

Great but as you confusing, although typically Garmin  ;)

I noticed some are called map_mdr.img.

I'll check some other pc s tomorrow; I suppose you are specifically looking for mdr16

Nick

On 28/12/2021 18:17, Gerd Petermann wrote:

...

Hi Nick,

thanks, the mdr file looks like a very early version with a very different structure. Should help to understand the remaining bits :)

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:00 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Gerd

I have done a few for you, including one which causes a java error so added the mdr

https:\pinns.co.uk\2812\mdrmap.zip

Wishing you and Ticker  every success! Great Job !

r

Nick

On 28/12/2021 14:55, Gerd Petermann wrote:

...

java -ea  -Xmx6800m -cp d:\display\dist\display.jar;d:\mkgmap\dist\mkgmap.jar test.display.MdrDisplay MDRMAP.img   --print=16 > mdr16.txt

---

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Hi all, thanks for all the input. It answered most of the open questions, display tool r577 should be able to analyse all the files. Binary is here: https://files.mkgmap.org.uk/detail/543 See also https://www.mkgmap.org.uk/websvn/listing.php?repname=display&rev=576 and https://www.mkgmap.org.uk/websvn/listing.php?repname=display&rev=577 @Nick: the larger MDR seems to cause trouble when section 1 is displayed. Will look into this later. r577 should work with option --print=!1 This option means that all but the 1st section should be printed, will cause huge output for that file, but string decoding seems to work well Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Mittwoch, 29. Dezember 2021 12:03 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help Hi Ticker / Gerd I've found another one which I think included mdr15 but second byte = 0x15 Also added a mdr.mdrfrom Topo France V3 which the display.jar couildn't parse but might be of interest Warning file sz is large https:\pinns.co.uk\2812\mdr2.zip HTH Nick On 29/12/2021 09:31, Ticker Berkin wrote:

Hi Nick

Thanks.

Interesting, but not maybe not relevant to the Huffman stuff, in mdr16austria.txt the MDR headers go out of sync after MDR30

Ticker

On Tue, 2021-12-28 at 18:28 +0000, nick wrote:

...

Hi Gerd

OK thanks will check that tomorrow.

I think it's amazing how far both of you got.

Nick

On 28/12/2021 18:26, Gerd Petermann wrote:

...

Hi Nick,

yes, and esp. those MDR 16 which do not have a 0x15 at offset 2 like in this example: 000003fa | 000000 | aa 04 15 1b 15 08 cf 00 | record 0 (len: 300, 0x12c)

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:21 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Gerd

Great but as you confusing, although typically Garmin ;)

I noticed some are called map_mdr.img.

I'll check some other pc s tomorrow; I suppose you are specifically looking for mdr16

Nick

On 28/12/2021 18:17, Gerd Petermann wrote:

...

Hi Nick,

thanks, the mdr file looks like a very early version with a very different structure. Should help to understand the remaining bits :)

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:00 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Gerd

I have done a few for you, including one which causes a java error so added the mdr

https:\pinns.co.uk\2812\mdrmap.zip

Wishing you and Ticker every success! Great Job !

r

Nick

On 28/12/2021 14:55, Gerd Petermann wrote:

...

java -ea -Xmx6800m -cp d:\display\dist\display.jar;d:\mkgmap\dist\mkgmap.jar test.display.MdrDisplay MDRMAP.img --print=16 > mdr16.txt

---

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Hi Gerd The only thing I can add is that the large mdr file is part of the current Garmin NT file structure , ie Topo France V3 , which might explain the 2 additional bytes. Nick On 30/12/2021 07:19, Gerd Petermann wrote:

Hi Nick and Ticker,

there is another problem with the large mdr file. The POI section (MDR 11) seems to contain 2 unexpected additional bytes before(!) the known bytes for city and MDR15 offset. We should really try to find out the meaning of the magic number in MDR11 instead of looking at the recsize only. The current logic also fails with a gmapsupp index and tries to read MDR 15 offsets :( Maybe we can learn something for mkgmap there.

I'm working on an implementation of Huffman encoding in mkgmap first...

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Gerd Petermann <gpetermann_muenchen@hotmail.com> Gesendet: Mittwoch, 29. Dezember 2021 12:29 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Please help

Hi all,

thanks for all the input. It answered most of the open questions, display tool r577 should be able to analyse all the files. Binary is here: https://files.mkgmap.org.uk/detail/543

See also https://www.mkgmap.org.uk/websvn/listing.php?repname=display&rev=576 and https://www.mkgmap.org.uk/websvn/listing.php?repname=display&rev=577

@Nick: the larger MDR seems to cause trouble when section 1 is displayed. Will look into this later. r577 should work with option --print=!1 This option means that all but the 1st section should be printed, will cause huge output for that file, but string decoding seems to work well

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Mittwoch, 29. Dezember 2021 12:03 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Ticker / Gerd

I've found another one which I think included mdr15 but second byte = 0x15

Also added a mdr.mdrfrom Topo France V3 which the display.jar couildn't parse but might be of interest

Warning file sz is large

https:\pinns.co.uk\2812\mdr2.zip

HTH

Nick

On 29/12/2021 09:31, Ticker Berkin wrote:

...

Hi Nick

Thanks.

Interesting, but not maybe not relevant to the Huffman stuff, in mdr16austria.txt the MDR headers go out of sync after MDR30

Ticker

On Tue, 2021-12-28 at 18:28 +0000, nick wrote:

...

Hi Gerd

OK thanks will check that tomorrow.

I think it's amazing how far both of you got.

Nick

On 28/12/2021 18:26, Gerd Petermann wrote:

...

Hi Nick,

yes, and esp. those MDR 16 which do not have a 0x15 at offset 2 like in this example: 000003fa | 000000 | aa 04 15 1b 15 08 cf 00 | record 0 (len: 300, 0x12c)

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:21 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Gerd

Great but as you confusing, although typically Garmin ;)

I noticed some are called map_mdr.img.

I'll check some other pc s tomorrow; I suppose you are specifically looking for mdr16

Nick

On 28/12/2021 18:17, Gerd Petermann wrote:

...

Hi Nick,

thanks, the mdr file looks like a very early version with a very different structure. Should help to understand the remaining bits :)

Gerd

________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von nick <osm@pinns.co.uk> Gesendet: Dienstag, 28. Dezember 2021 19:00 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Please help

Hi Gerd

I have done a few for you, including one which causes a java error so added the mdr

https:\pinns.co.uk\2812\mdrmap.zip

Wishing you and Ticker every success! Great Job !

r

Nick

On 28/12/2021 14:55, Gerd Petermann wrote:

...

java -ea -Xmx6800m -cp d:\display\dist\display.jar;d:\mkgmap\dist\mkgmap.jar test.display.MdrDisplay MDRMAP.img --print=16 > mdr16.txt

---

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