[OSGeo Africa] Android GPS tracking on offline imagery

Immo Blecher immob19 at gmail.com
Mon May 22 00:19:09 PDT 2017

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.



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] 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**
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Contact me: immob19 at gmail.com immoblecher



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