[OSGeo Africa] Field mapping GPS suggestions please

[Lydia du Toit]

Hi Taryn
I saw a demo of the collector app and it is good. 
Accuracy – 3 - 5m .  
Contact Lebo at ESRI offices in Midrand.  
She knows her software and can answer any questions.

If you can afford to buy a good GPS contact Kevin Bolton (just Google him)He is a qualified surveyor and knows his subject matter. 

Hope this helps
Lydia



From: Gerhardus Geldenhuis 
Sent: Wednesday, May 20, 2015 10:27 AM
To: Africa local chapter discussions 
Subject: Re: [OSGeo Africa] Field mapping GPS suggestions please

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



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Gerhardus Geldenhuis


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