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<div style="direction: ltr;">NGI has a standard for its DEM s that should be a good starting point </div>
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<div style="direction: ltr;">Check out technical docs section</div>
<div style="direction: ltr;">www.ngi.gov.za</div>
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<div class="gmail_quote">On Wed, Aug 8, 2018 at 8:15 AM +0200, "Terence Turnbull"
<span dir="ltr"><<a href="mailto:tvturnbull@gmail.com" target="_blank">tvturnbull@gmail.com</a>></span> wrote:<br>
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<p class="MsoNormal">Dear Muzi</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am not aware of a standard, (good question) however all I know is that you should declare your positional accuracy on your product. The positional accuracy is dealt with on a case by case basis depending on the clients requirements.</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My warmest regards </p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Lt Col T.V. Turnbull<br>
SO1 GEOMATICS<br>
<br>
Tel: 084 206 8650<br>
Email: tvturnbulll@gmail.com<br>
Office DW Fmn: 012 674 4283<br>
Office Co-ord: 25°47'33.60"S<br>
28° 8'53.49"E</p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="border:none;padding:0cm"><b>From: </b><a href="mailto:madodomzi@cadmapping.co.za">Madodomzi Mafanya</a><br>
<b>Sent: </b>Tuesday, 07 August 2018 2:17 PM<br>
<b>To: </b><a href="mailto:africa@lists.osgeo.org">africa@lists.osgeo.org</a><br>
<b>Subject: </b>[OSGeo Africa] National Positional Accuracy Standards for DigitalGeospatial Data</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi List,</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I once asked this question in a GISSA meeting sometime in 2015. With regards to 'strictly' rasterized digital geospatial data (e.g. DTMs and Orthomosaics), do we have a South African national positional accuracy standard? I think the rapid
recent technological advancements in UAV and GNSS/RTK technology necessitates this question.</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If we do have a standard, where do I find it?</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">ASPRS has something of this nature but are we looking into adopting some of this and making it mandatory for the sake of our profession?</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards,</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Muzi</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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