Updating navigation Maps for Yeti. Extracting data to SD card

[ExXB]

Been banging my head against the wall as I just can't get this to work. One thing is confusing me. The instructions say:

1. Download data to a folder on your computer. We recommend that you create a new folder (eg .: map updates).
2. Delete all data on the SD card or format the card.
3. Insert the card into your computer
4. Open the first file in the folder with the downloaded data and extract into the SD card.
5. Remove the SD card from your computer.

(I think steps 2 and 3 should be reversed)

What does No. 3 "extract into the SD card" mean. It's a .txt file and it appears to have some necessary data.

The download data is a .zip file which I downloaded and unarchived into a folder on my desktop

When I copy the two files onto the SD card and insert it in the Nav system I get an error 'maps not available'.

HELP!!!!

[Jhieminga]

'Extract into the SD card' should probably be read as: unarchive to the SD card. The system may need to see a specific folder structure on the card. That could be the reason for the error.

[ExXB]

Thanks, I've tried exporting directly to the SD card. I end up with a folder called maps and a file called wwww.md5sum.txt.

A md5sum file should not be a text file. I suspect the Mac is converting the file type to .txt as it dislikes executable files but you can't execute this type of file on a mac, except maybe in Terminal.

I've been in touch with the Skoda technical people that can only tell me that it works on their Mac!

[G0ULI]

The md5sum.txt file is probably actually a checksum file to make sure all the other extracted files are the right size and not corrupted. Normally you open this file in a text editor and check that the list of files and file sizes match what has been extracted from the .zip file.

Map updates only require data files. Unless the map program itself was being updated, which seems unlikely, the update files should consist of a large map file, and perhaps several smaller files relating to locations of petrol stations, speed cameras, supermarkets and so on.

I strongly suspect that the md5um.txt file is not needed once the files are extracted and checked. It may be that the map files you have downloaded are corrupted or not unpacked properly.

The process should be something along the lines of download the zip file.
Unzip the file and save the contents into a folder.
use the md5sum.txt file to check that all the unzipped files are present and the file sizes match the sizes in the md5sum.txt file.

Copy the unzipped (unpacked) files to an SD card in the root directory of the card, or other directory as detailed in the instructions for updating your nav system. The md5sum.txt file shouldn't be necessary, just the data files.

Assuming the map files are in the correct format and from an "official source", it should just work.

[ExXB]

Thanks G0ULI,
The md5sum text file has data in in. 622 kb's of it. First few lines are:

8ca2ee644190f1188c7a9990a0b83a26 maps/00/cfg/Delphi/V1/MAN/cfg_customer_update.tar.gz
3da3f939c288663942cd7f5a4e7931aa maps/00/cfg/Delphi/V1/MAN/cfg_customer_update_version.xml
d08963780af7c9abd8a254d47183142e maps/00/cfg/Delphi/V1/VW/cfg_customer_update.tar.gz
60595a797c3c3bb21312596ac0332072 maps/00/cfg/Delphi/V1/VW/cfg_customer_update_version.xml
02b61ddddbde39fbc314a13c30347d90

From comparing the files on the original SD card to the data unpacked from the zip file there are some 'empty' folders. The folders that are empty (on the original) include data that is in the md5sum.txt file. (This includes my VIN which I had to enter on the website before I could download the maps)

I'm guessing is somehow the text file (or whatever) is supposed to be "run" and it transfers information into the generic maps folders. Since this doesn't happen the map files aren't recognised in the car.

Sorta of a bootstrap. But my Mac is deactivating the file from running.

I'm going to try and find someone with a PC that I can borrow and try and unpack it to the SD card that way.

[Saab Dastard]

I'm guessing is somehow the text file (or whatever) is supposed to be "run" and it transfers information into the generic maps folders.

No, the purpose of the MD5 checksum text file content is purely for comparison.

For example, you should run a checksum utility on the "maps/00/cfg/Delphi/V1/MAN/cfg_customer_update.tar.gz" file, which will generate a checksum for that file. You then compare it to the "8ca2ee644190f1188c7a9990a0b83a26" value you have been given in the text file. If they match you are assured that the original and your downloaded copy are identical.

SD

[G0ULI]

This is almost certainly part of a protected licensing system to make sure the files are genuine, suitable for your system, and not simply being copied for free from another more up to date device.

Unzipping and copying the files to an SD card using a PC is probably the best way forward. Everything should at least work as expected.

[Glamdring]

Does This help?

[ExXB]

Glamdring, Thank you very much. I suspect they just want users to get their garage to do the update,

Will try and find someone with z7 on their PC.

[G0ULI]

Just some extra information regarding file formats.

.tar files are compressed files similar to .zip files. The difference is that .zip files use a commercial format for which a licensing fee is payable when software is distributed commercially. The .tar files are essentially free to use.

z7 is a compression/decompression software program that deals with several different types of compressed files including .zip and .tar formatted files. It is essentially free to use having originated in the Linux community.

So this is really all about avoiding having to pay extra money to software companies for use of their products. It might only amount to a penny a file, but with millions of files in use every day, it soon mounts up.