Is there any possibility to delete an offline map only partially?

Michael shared this question 4 years ago
Answered

Hey,


first of all thanks for that great app <3


My problem: I am preparing a trekking vacation in scandinavia (Nordkalottleden which crosses NO, SE and FI) and been downloading maps for a while.


As it seems, there is currently no option to move the maps to an external SD card. So I am limited to ~4GB.

During the last 10 days or so I downloaded a relativly large part of northern Norway (up to zoom 13) and more detailed maps along the track (up to zoom 16 for tiles within 1km of the track). Now I realized that I was a bit too greedy. Stupid - the internal storage is full.


Is there any possibility to remove some parts of the file (e.g., only my DLs on zoom 13). Or is deleting the complete file (and redownloading it...) the only way to get some space? :/

Replies (5)

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Hi Michael

>As it seems, there is currently no option to move the maps to an external SD card<

why not? please read

http://docs.locusmap.eu/doku.php?id=manual:user_guide:settings:misc#default_directories

and

http://docs.locusmap.eu/doku.php?id=manual:faq:use_sdcard_on_kitkat

Wolfgang

EDIT: split maps should be possible with Mapc2Mapc

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Thanx, that works (came across these articles previously; skimmed and probably misunderstood :/)

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Hi guys,

thanks balloni for a precise answer. If there won't be something clear Michael, feel free to ask.


I may also suggest to give it a try to LoMaps ( from Locus Store ) or any other source of vector maps available on internet. They are really small and also quite fast with rich detail on most places. And just for some most important areas, you may download a lot less amount of tiled maps. Just small tip ...

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Mh, Locus doesn't like my SD card.


I relocated my three maps to the SD card. Locus displays two of these (the 2GB-file of the norwegian map is somehow corrupted). However, when I try to extend my maps (supplementary downloads) I get the following message:


'Process unsuccessfull. Locus map cannot create or edit the map on SD card. Please change the map directory.'


Accordding to the Android application manager Locus has only permission to read from the SD card.

Is locus generally unable to write on SD cards? So I assume I have to keep my files on my internal storage while extending them (?) :/

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Good day Michael,

this is correct. Locus Map ( better no application ) is able to write to database files placed on SD ( not in app private directory where this is possible ) card since Android 5.0. So Locus Map may read these raster maps from SD card, but if you keep to make some modifications in the map file, it have to stay in internal memory.

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There are still issues :(


On my first attempt to move my 3 maps to my SDcard, two of them were successful. The 1.9-GB-Norway-Map was not - "Unknown problem" on initialization. (For every map I moved both the sqlitedb and the sqlitedb-journal file). However, at this point none of my maps was actually completed for my purposes. So I continued downloading (and restarted the Norway download).


Now my Finland map is complete (~1.3 GB) and I tried repeatedly to copy the files to the SDcard (copying instead of moving to avoid risk of losing data). Every time Locus reports "Unknown problem" for the map on initialization.


So I assume this problem is related to the file size. But I have no idea whether this is caused by Locus or android or possibly a bad file manager.


Has anyone experienced similar problems? When having copied a file, is there a problem when Locus detects 2 file of the same file name? May renaming sqlitedb-files cause problems (I applied the same name for the sqlitedb and the journal file)?

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Hard to say where may be a problem, seems to be too much operations at once.


Suggest to

a) try different file manager, total commander for example

b) delete cache of Locus Map, so simply delete Locus/cache directory which force Locus to re-initialize all maps

c) ignore journal files, they are just un-important trash

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Problem found: it seems that the SD card was corrupted. Again, thanks a lot for your help and recent hints!

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