[OSGeo Africa] National Positional Accuracy Standards for DigitalGeospatial Data

Aslam Parker Aslam.Parker at drdlr.gov.za
Wed Aug 8 08:04:05 PDT 2018

NGI has a standard for its DEM s that should be a good starting point

Check out technical docs section

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On Wed, Aug 8, 2018 at 8:15 AM +0200, "Terence Turnbull" <tvturnbull at gmail.com<mailto:tvturnbull at gmail.com>> wrote:

Dear Muzi

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.

My warmest regards

Lt Col T.V. Turnbull

Tel: 084 206 8650
Email: tvturnbulll at gmail.com
Office DW Fmn: 012 674 4283
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From: Madodomzi Mafanya<mailto:madodomzi at cadmapping.co.za>
Sent: Tuesday, 07 August 2018 2:17 PM
To: africa at lists.osgeo.org<mailto:africa at lists.osgeo.org>
Subject: [OSGeo Africa] National Positional Accuracy Standards for DigitalGeospatial Data

Hi List,

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.

If we do have a standard, where do I find it?

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?



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