OziExplorer on Samsung Galaxy

Submitted: Friday, Aug 03, 2012 at 15:50
ThreadID: 97235 Views:7986 Replies:6 FollowUps:3
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Hi All,

A few weeks back there was a very helpful post regarding installation of Ozi on a Samsung Galaxy tab 2. I've now made the investment and have got everything largely working. For those thinking of going up this path, there are a few traps and I seem to have fallen for them all!

Trap 1 - The older Galaxy Tab is fitted with 2 cameras with quite useful resolution, while one of the cameras in the newer Tab2 is low resolution. A backward step.

Trap 2 - The Galaxy is a nice unit....but.... it comes in various flavours. (Quite apart from the 3 sizes, 7", 8.9" and 10.2". My experiences relate to the 10.2" one, fitted with 16GB native and a 32GB microSD card.) They will all (?) accommodate a maximum of 64 GB of memory/solid state drive, but come fitted with 16, 32 or 64 GB, and the 16 and 32 GB versions accept up to another 32 GB by using a microSD card. Some include provision for connecting to the 3G phone network, some have Wifi for internet connection, some have an inbuilt gps. I haven't yet worked out if these various combinations have different model numbers, but I don't think they have - certainly I haven't met any salesperson who can tell me how to positively determine which has what. Samsung's information on the web is very poor and no help. This is a serious issue that Samsung should address - there must be a lot of people who have paid $500-$700 to then find they can't access the web or can't use the phone network.

Trap 3 - There is still some doubt, but it seems that apps must be run from the internal memory, not the extra memory on the SD card. This is quite a limitation if you start off with the 16GB version.

Trap 4 - Thanks to some firmware quirk, writing to the extra memory on the SD card can only be achieved using a supplied file handling app. Consequently moving files there using a pc involves writing to the inbuilt memory then using the app to move the files to the extra memory. Any app that needs to write there won't work either. No gold medals for Samsung for that little trick!

Trap 5 - To add further confusion, the built-in memory is referred to by Samsung as "SDCard" and the user supplied memory is "extSDCard".

When we come to install OziExplorer things get complicated. It should be installed on the SD card (which one?). Since it needs to write configuration stuff it can't run properly on the extra SD memory. (Takes a few attempts and a lot of googling and searching specialist forums to arrived at that decision!)

Finally I've got it working, but no thanks to Murphy's Law. One last (I hope!) problem that I'd really like some help with - I've loaded the map files in ozfx2 or ozfx3 format, complete with their .map files and most appear to work fine. But the the one map we use most, the 250k Natmap coverage of the whole country doesn't come up properly. The map image is simply a blank screen, though the gps position and range rings appear correct, so I doubt that it is pointing to a featureless part of the map.

And the question - Has anyone managed to use this map? I'm wondering if the image is simply too big, or maybe I've produced a corrupted ozfx file, or ........

Any thoughts will be highly valued. (Alan - tried to MM you, but I don't think MM is working too well. If you'd care to work directly, please email johnandval at exemail.com.au)



J and V
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Reply By: Sand Man (SA) - Friday, Aug 03, 2012 at 18:43

Friday, Aug 03, 2012 at 18:43

I have had no issues at all in installing OziExplorer on my Galaxy Tab 10.1.
Where did you get the information that it should be installed on the SD card?

I simply copied the .apk file to a download directory I created on the Tablet, then ran the executable file by double clicking on it.
There is an installation help section on the OziExplorer for Android web page which is quite easy to follow.

OziExplorer was installed to the internal memory of the Galaxy by default and all other sub-directories, including the Maps and Data directories are under the OziExplorer one.

I don't have the Australia Map installed, only the 8 250K zone49 through zone56 maps, plus the default World map which I don't use.

I haven't noticed any problems with Ozi yet, but haven't used it very much yet either.
One thing to keep in mind is that OziExplorer for Android is still in "Beta mode" and there may be glitches that will be ironed out in future releases.


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Follow Up By: Member - John and Val - Friday, Aug 03, 2012 at 19:47

Friday, Aug 03, 2012 at 19:47
Thank you Bill.

Where did I get the information that it should be installed on the SD card? The Ozi installation instructions say "Download the OziExplorer apk file and put it on the SD card of your device in the top level folder of the SD Card. " Maybe that means the on-board memory. Anyway, I now have it installed on that internal memory and it largely works, but it was quite a battle which I thought was worth sharing with the folks here.

One of the most frustrating aspects of what should have been pretty straightforward, is the range of poorly defined Galaxy options. From what I've read, with different memory configurations people are getting different results. Certainly with a full 64GB on board, the inability to write to the SD card doesn't arise. (That is another new "feature" introduced between tab and tab2.) Differences between the ...tab and ...tab2 are poorly documented - what works on a 64GB tab may perform quite differently on a 64GB tab2 and differently again from 32GB machines or those with user-installed memory. Computers!

Think I'll follow your example and only load the critical parts of the 250 set. I suspect that the full file is simply too big for the little machine to handle. I am hoping that someone may have either managed that install, or tried but not managed it, to help isolate the problem.

Yes, I'm aware that the Android Ozi is still in beta, but having used Ozi for a long time now, I have the greatest respect for Des' programming skills and reckon his beta will be better than most people's commercial version!

Thank you for your input.


J and V
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Reply By: get outmore - Friday, Aug 03, 2012 at 20:54

Friday, Aug 03, 2012 at 20:54
im unsure why you think 16g isnt enough - ive got 10 gig on my phone and run ALOT of maps

every hema map every 250k map, street level maps for the whole of perth and every country town all the geological maps for wa, all of the SW down to 50k

now the reason i run them on my phone memory is so androzic which doesnt give you options can read them

if your just using ozi you can install the maps onto an sd card and direct your files directory to the SD card for both the maps tracks and waypoints
AnswerID: 492188

Reply By: equinox - Friday, Aug 03, 2012 at 20:59

Friday, Aug 03, 2012 at 20:59
Hi John,

I have the GT-P7500 model (Samsung Galaxy Tab 10.1). It has 64 GB, WiFi, 3g etc..

I purchased it for the primary purpose of navigation with Oziexplorer. The other functions such internet, sms and imaging are secondary, however are quite handy.

Do you mean that you cannot use the Mosaic 250K map? I don't have that map, and really I prefer individual maps to save on memory anyway. However I do have two large 100K maps, the largest being 1.46 GB and it runs fine on moving map mode. There is some pixelation if you try to change to a different area of the map really quickly in non-gps mode however that is not a big drama.

I have about 2600 maps taking up just over 12 GB all stored on the internal memory. I don't have a SD slot so internal memory is the only option for my circumstance. There is an SD/USB adapter available however it uses the main comms port which I will need for power.

The application is stored on the internal memory too. I would suggest trying this if you haven't already. If you have 16 GB unit that is still a large amount of memory for quite a few maps, unless of course you have other non-navigational need for it.

You may be right of course and have a corrupt OZFX file. I'd seriously consider trying using the individual maps and see how that goes.

I have nothing but praise for this unit and I can't wait to field test it proper.


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AnswerID: 492189

Reply By: Member - graeme W (WA) - Friday, Aug 03, 2012 at 21:21

Friday, Aug 03, 2012 at 21:21
Hi John.

It was my post back a few weeks and with Alans help loaded the australian hema map set with the 250k raster maps i think you are trying to load.All the maps need an image file and that might not be loaded on yours .Everything just loaded to the default folder in the my files section of the device[10.1 64gbs].The maps from the my files folder connected to the running software without me telling it also.

Things that i like and are easy to use are waypoints as you can rename delete etc as you go like a normal gps.{im used to a magellon and navman,the magellon is very good just has a tiny screen compared to this].

Bits i dont like and wont use now are the track logs as you cant delete or rename with the software.We record tracks as a means of getting back to a spot in the future and this means having to record manually so you know whats what at a later date to change or delete on a pc then transfer back to the tablet.Not much help when out in the desert for example.This a fault of the software not the tablet.
Ttrying to work out the route system and saved a track as a rtfile in routes but when i load it nothing shows on the map.Maybe operator error but been trying for a couple of weeks now to sort it.
Will email the developer if i cant work it out and might ask him about the possibilty of changing the tracks set up.Is it the same on windows oziexplorer.

cheers Graeme.

AnswerID: 492192

Follow Up By: Sand Man (SA) - Friday, Aug 03, 2012 at 23:12

Friday, Aug 03, 2012 at 23:12

There is an app on the Galaxy called My Files and you can delete and rename tracks in the Data directory.

Highlight the box to the left of the track file you wish to change and a green arrow will appear in the box.
Click on the rubbish bin to delete the file, or click on the right hand icon at the top and you will get the option to rename the file.


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Reply By: Ozhumvee - Friday, Aug 03, 2012 at 21:29

Friday, Aug 03, 2012 at 21:29
I installed it on our Aldi Medion 10" Android tablet about six months ago and it has worked perfectly ever since, runs all of the maps, no problems at all.
It has inbuilt GPS, 3G etc.
AnswerID: 492193

Reply By: Member - John and Val - Sunday, Aug 05, 2012 at 07:58

Sunday, Aug 05, 2012 at 07:58
Thank you everyone for your input. I'm getting close to deciding that my file naming may be at the core of my frustrations. Most maps work fine.

For anyone attempting to set up Ozi on a Galaxy tab2, the rule seems to be :

Don't rely on running it on a plug-in SD card. It won't. Best to buy a Galaxy with a full 64 GB of internal storage and keep all maps ( map images and .map files) in the default "maps" folder.

Really appreciate the generous support you've provided.



J and V
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Follow Up By: get outmore - Sunday, Aug 05, 2012 at 10:49

Sunday, Aug 05, 2012 at 10:49
as i said you can map your file pathways to anywhere so you can have your maps on an external SD card

but with 10 gig ive got more than enough for 100s of maps

the actual ozi app is quite small and as you say like all apps it has to be on your internal memory like most apps and if space is an issue just have your maps on micro SD card
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