[OSGeo Africa] Android GPS tracking on offline imagery

Wesley Roberts jwesroberts at gmail.com
Mon May 22 01:37:43 PDT 2017

Dear Zoltan,

I have used BackCountry Navigator in the past and now more recently as
well. It is a great little app that allows you to download imagery and
background maps for offline usage.


A free version is available and works just fine.



On Mon, May 22, 2017 at 9:19 AM, Immo Blecher <immob19 at gmail.com> wrote:

> Hi Zoltan,
> I have used OruxMaps for this purpose for many years now and it used to be
> free with a nagging "Donate" now and then. These days you can only donate
> and then install it. But it is amazing and a small prize to pay. It works
> perfectly with OpenAndroMaps but also supports online maps.
> With the OruxMapsDesktop app you can then convert whatever images to the
> OruxMaps format...there are a couple of YouTubes and blogs available how to
> do that.
> Locus Map is another popular alternative but you also have to use a few
> "tricks" to convert image files to a suitable format.
> Regards
> Immo
> On 22/05/2017 08:44, Catchall wrote:
> Hi Walter,
> Amazing what one finds on their doorstep, hey? :-)
> You hit the nail on the head when you said "less travelled roads" and
> "holiday" - that's exactly the reason I'd like to use it for.
> Cheers for now,
> Z
> On 2017/05/22 08:02, Walter Smit wrote:
> Hi Zoltan
> I am amazed that Aslam has not already replied with "PDF Viewer"...NGI
> actively promotes it.
> Personally I have all the 250k topos on my tablet and also upload any 50k
> topos (tifs work fine) of areas that I want to go to. You can even make
> maps (with routes/point of interest etc and the background you prefer) in a
> GIS package of your choosing and provided that package can save a
> georeferenced PDF, you can then save that on the tablet. I have
> successfully used this on holiday, when driving along the "less travelled"
> roads - checking my location relative to the planned route and 50k topo
> images.
> You certainly can see you current location and I believe you can drop some
> pins. It is also free (last time I checked they wanted to sell you
> maps/data, which we don’t need). Scrolling is smooth on my tablet.I
> certainly would not recommend it as a spatial data capturing app, but it
> certainly is good as an informal tool.
> Negatives: It crashes often on my tablet, but only when I am doing
> uploads/processing. I don’t recall it crashing during actual use. Uploading
> many separate files/tifs is cumbersome. Get a good sized SD card...it
> duplicates your tifs into what I suspect are tiles and/or pyramids. It is
> picky about the types of tifs it consumes, but I cannot remember which...I
> suggest starting with uncompressed RGB images.
> Hope that helps
> Walter
> -----Original Message-----
> From: Africa [mailto:africa-bounces at lists.osgeo.org
> <africa-bounces at lists.osgeo.org>] On Behalf Of Zoltan
> Sent: 21 May 2017 06:37 PM
> To: Africa local chapter discussions
> Subject: [OSGeo Africa] Android GPS tracking on offline imagery
> Hi AfricaList,
> I see that there is a truckload of GIS related Apps in the Google
> Playstore.
> I've just bought the new Samsung Galaxy Tab S3 (latest Android) and would
> like to put some TIF format aerial orthos onto it, and view them "at my
> current location" (track while I drive).
> Beyond that plus zoom in/out, the only functionality I might want is to
> drop a pin at current location, and add a short note to it.
> So, given this really basic, simple need, plus the billions of Android
> apps in the playstore, would anyone like to recommend a really lightweight
> app that I can do this with?
> Regards and thanks in advance,
> Zoltan
> --
> *Immo F. Blecher*
> * Street: *
> * 52 Lynedoch Eco Village, Lynedoch, 7603, South Africa **Postal:*
> * 52 Lynedoch Eco Village, Lynedoch, 7603, South Africa **Cell:* +27 83
> 272 6791 | *Fax: *+27 86 7363302 <+27%2086%20736%203302> *Email:*
> *immo at blecher.co.za* <immo at blecher.co.za> | *immob19 at gmail.com*
> <immob19 at gmail.com> |
> *immob at mymtnmail.co.za <immob at mymtnmail.co.za> **Internet:*
> *http://www.blecher.co.za/* <http://www.blecher.co.za/>
> Contact me: immob19 at gmail.com immoblecher
> <http://www.linkedin.com/pub/immo-blecher/30/414/b8>
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Wesley Roberts
jwesroberts at gmail.com
Cell RSA: +27(0)83 5355 646
Cell ZAM: +260 97 523 7942
skype: roberts-w
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