Gerhardus Geldenhuis

Mapper since:: November 27, 2012
Last map edit:: December 15, 2025

I’m a qualified Geologist and have spend a fair amount of time in Zimbabwe doing geological mapping there. My OSM interest is mainly in improving data for a few towns in Zimbabwe, and making South Africa’s map really good quality.

I am doing a part time MSc in Geographic Information Science so contributing to OSM seems like the natural thing to do.

Latest Diaries

Diary Entry Editing on steroids?

I have been a OSM contributor for just over a year and have created my fair share of new data. I started out using Potlatch2 on my slow Toshiba lap...

4 comments December 26, 2013

Diary Entry Unexpected items in the bark garden.

osm.org/?lat=-26.140363&lon=28.134159&zoom=19 Imagery will reveal all.

0 comments May 11, 2013

Diary Entry Quality of river mapping

I just realized that the Vaal river in South Africa, which has been mapped by different people has been mapped using Bing and CD:NGI imagery. This ...

2 comments January 30, 2013

Diary Entry Severe flooding

I was using CD:NGI imagery to trace the Vaal River borders and thought I would double check an inlet using Bing, was amazed to see the difference. ...

5 comments December 29, 2012