hi
i need to find a way to extract some caches from cache file of OfflineMaps that extention .dat file
ex.
i downloaded caches of england .. and the cache stored in this path..
OfflineMaps/cache/builtin-maps/OSMMPQ.DAT
how can i extract some caches area from this file "OSMMPQ.DAT" ?
please help
thx.
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[resolved] OfflineMaps+ - Extract some caches from .dat file ..
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Re: OfflineMaps+ - Extract some caches from .dat file ..
Hi,
This .dat format is quite complex and no specs are available now.
Why not getting the data directly from where it comes, ie here, where it's simply available as images?
This .dat format is quite complex and no specs are available now.
Why not getting the data directly from where it comes, ie here, where it's simply available as images?
Do you like AlpineQuest ? Leave a small comment on Google Play !
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Re: OfflineMaps+ - Extract some caches from .dat file ..
Well,
not so many answers here in the last years![Wink ;)](./images/smilies/icon_e_wink.gif)
However, as e.g. OTM does not allow to download too many files at once, the cache saves some time, when re-using the tiles somewhere else...
So, I worked on extracting the cached tiles (IDX and DAT) and hopefully it helps somebody out there.
The code is not checked very well, but for me (AQ v 2.2.5d) it perfectly extracts some PNG on UNIX (Don't worry, should run on other "OS's" as well).
So please accept that this utility and code comes with absolutely no warranty!
Attached is a zip file, containing to jars, one executable, the other just containing the source code.
Some typical calls could be:
Maybe the IDX stuff does not really help, but if you want to understand the structure and/or extract specific tiles (or on the fly by other applications), you should understand the IDX.
I did not understand all of the bits and bytes in the IDX or DAT file, so the tool might not work always ;/
Give it a try, comments welcome![Smile :)](./images/smilies/icon_e_smile.gif)
Martin
not so many answers here in the last years
![Wink ;)](./images/smilies/icon_e_wink.gif)
However, as e.g. OTM does not allow to download too many files at once, the cache saves some time, when re-using the tiles somewhere else...
So, I worked on extracting the cached tiles (IDX and DAT) and hopefully it helps somebody out there.
The code is not checked very well, but for me (AQ v 2.2.5d) it perfectly extracts some PNG on UNIX (Don't worry, should run on other "OS's" as well).
So please accept that this utility and code comes with absolutely no warranty!
Attached is a zip file, containing to jars, one executable, the other just containing the source code.
Some typical calls could be:
Code: Select all
java -jar /path-to-jar/AqCache.jar (general help)
java -jar /path-to-jar/AqCache.jar AqDatDump (specific help)
java -jar /path-to-jar/AqCache.jar AqDatDump OSMOTM.DAT (just list)
java -jar /path-to-jar/AqCache.jar AqDatDump -e png OSMOTM.DAT (list and extract)
java -jar /path-to-jar/AqCache.jar AqIdxDump (specific help)
java -jar /path-to-jar/AqCache.jar AqIdxDump OSMOTM.IDX (just list)
java -jar /path-to-jar/AqCache.jar AqIdxDump -e png OSMOTM.IDX (list and extract)
I did not understand all of the bits and bytes in the IDX or DAT file, so the tool might not work always ;/
Give it a try, comments welcome
![Smile :)](./images/smilies/icon_e_smile.gif)
Martin
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Re: OfflineMaps+ - Extract some caches from .dat file ..
Thanks for the tool!
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