[OSGeo Africa] Field mapping GPS suggestions please

[Chris Berens]

Mobile phone GPS may give you an accuracy of 25m if you are lucky.
Maybe just draw your special areas in by hand on a 1:1000 field map
with a pencil crayon.
For mobile GIS/GPS try HGIS from Starpal, it will only run on a
Windows mobile OS but the demo works for free in Africa for
Environmental projects. Otherwise if you find an android device with a
decent clock you can run QGIS Android version.
Chris Berens
PLATO GISc 1308
www.mapland.co.za
+27 (0)82 567 9322


On 20 May 2015 at 10:27, Gerhardus Geldenhuis
<gerhardus.geldenhuis at gmail.com> wrote:
> Hi,
> I am no expert but I can't imagine that a mobile phone will be equivalent in
> accuracy to something like a Trimble. You most certainly pay for the brand
> but you also pay of the more accurate internal clock that plays a crucial
> part in the error margin. I have used a Garmin 60CSx with a lot of success
> doing Geological mapping. If you add an external antenna that could also
> help with accuracy.
>
> Regards
>
> On 20 May 2015 at 08:21, Taryn Riddin <taryn.riddin at live.co.za> wrote:
>>
>> Good day
>>
>> Is anyone able to give me some advice please on choosing a GPS setup to
>> map estuarine habitats in the field?  Our SA estuaries are often very narrow
>> (1 to 2 km wide) and habitats small.  We distinguish between supratidal salt
>> marsh, intertidal salt marsh, reeds and sedges, among other habitats.  Reeds
>> and sedges often form a very narrow band along an estuary.  Accuracy needs
>> to be as close as possible to 1 m2, perhaps even better.
>>
>> Someone suggested using a windows / android phone running ArcGIS Collector
>> as the GPS in them is as good as a Trimble and also cheaper?  It could also
>> be a separate GPS linked to a tablet, not necessarily a single hand help GPS
>> unit with mapping options.  We use ArcGIS software for final map productions
>> and analysis.
>>
>> I am not very clued up on these aspects so any advise would be greatly
>> appreciated.
>>
>> Many thanks in advance,
>> Taryn
>>
>>
>> ________________________________
>> Research Associate - Botany Department
>> Nelson Mandela Metropolitan University
>> P.O. Box 77000
>> Port Elizabeth
>> 6070
>>
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>
>
>
>
> --
> Gerhardus Geldenhuis
>
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