Drakensberg Caves GPS Co-ordinates

18 Jun 2015 14:04 - 18 Jun 2015 14:05 #64304 by Smurfatefrog

Silverthorne wrote:
Is there a topic regarding cave/site ettiquette and best practice?

Here you go
www.vertical-endeavour.com/forum/12-drakensberg-caves/260-cave-etiquette.html

Silverthorne wrote: @ Smurf - The second last cave/shelter is en-route to Angel falls high up the valley on the left. If you know where Cobra Cave is it's not far

I'll try get co-ordinates next visit maybe July/August sometime. Need to plan another 4 day hike

No clue where those are, never heard of either of them :unsure:
Last edit: 18 Jun 2015 14:05 by Smurfatefrog.

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22 Jun 2015 08:17 #64334 by Silverthorne
Smurf they are both in the left of the Mzimkhulu river valley. Not sure of altitude though, I will definatley get you coordinates when I go in July :)
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22 Jun 2015 13:23 #64339 by Beard
Hi All.

On a similar note, is there an accurate place to download topography maps for GPS devices?

Its pretty helpful when ontop coming down, for location of the top of the passes.

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23 Jun 2015 08:00 #64352 by Silverthorne
www.gmaptool.eu/en/content/africa-south-osm-topo-routable

Try here, bottom of the page has links for different devices. Hope this helps
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03 Feb 2016 09:54 - 03 Feb 2016 10:22 #66816 by mayake
Hy, thks for this very useful list and coords. !one little question B)
I noticed some difference between your coordinates and those from www.berg.co.za for a same cave. The later are under WGS84. The coordinates hereupper are they under WGS84 too?
Why the differences ? I guess yours are acurate.
Last edit: 03 Feb 2016 10:22 by mayake.

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03 Feb 2016 10:03 #66820 by ghaznavid
How far out are they?

Anything within 50m should be close enough. Otherwise there are a few reasons why a co-ord may differ:
- Caves are generally in cliff bands, and GPS devices aren't that accurate when you are near cliffs
- Some caves are large, so a co-ord at the top vs bottom will be different
- Some people tag a cave when they are near it, others right in the entrance

I have the VE co-ords track loaded on my GPS and have used it many times, I am yet to have had a problem with it.

Getting to the top is nothing, the way you do it is everything – Royal Robins
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03 Feb 2016 10:21 - 03 Feb 2016 10:30 #66823 by mayake
Right, I though yours VE are liable. :)
For exemple ICIDI CAVE
(C Sommer GPS Coordinates: WGS 84
S28 48.473 E28 55.947 at 3 097 metres
(VE coordinates )
S28 48.311 E28 56.046 at 3172 m
Last edit: 03 Feb 2016 10:30 by mayake.

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03 Feb 2016 10:38 - 03 Feb 2016 10:42 #66824 by ghaznavid
It is noteworthy that the track in question is also C Sommer's (i.e. Intrepid), so I imagine they are on a different datum. Not sure about the altitude difference though.

Based on Google Earth, the second co-ordinate looks right. Icidi Cave is in a cliff line on the peak known as "Icidi Crown" (not named on the map). It is quite high up.

I find the info on berg.co.za to be very reliable, but haven't ever checked out their GPS co-ords, and rarely use their GPS tracks (the VE ones usually include more points). I have no doubt that there could be errors on the site (and VE too), after all, it is run by a human! I will send Dave (whose website it is) an email about this cave so that he can correct it, if you find any other differences, please let me know :thumbsup:

Getting to the top is nothing, the way you do it is everything – Royal Robins
Last edit: 03 Feb 2016 10:42 by ghaznavid.
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03 Feb 2016 14:01 #66827 by Papa Dragon
Ghaz, I noticed VE Didima Cave S29 04.418 E29 15.207 3185m
www.berg.co.za Didima S29 04.439 E29 15.253 3200m

Seems about 90m on GE

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03 Feb 2016 19:30 - 03 Feb 2016 19:31 #66832 by intrepid

mayake wrote: Right, I though yours VE are liable. :)
For exemple ICIDI CAVE
(C Sommer GPS Coordinates: WGS 84
S28 48.473 E28 55.947 at 3 097 metres
(VE coordinates )
S28 48.311 E28 56.046 at 3172 m

I looked into this, as I do from time to time update the data published on this site if I feel I have obtained a more accurate reading. However it seems to me that the waypoint for the cave on berg.co.za is in fact the waypoint for the summit of Icidi Pass - this is confirmed if you compare the waypoint listed under the passes - its the same one. So this is simply a publishing error (good if you can let Dave know, ghaz).

As for Didima Cave, GPSes do read differently, even when used at the same time and place. I have multiple readings for the cave, they are not all identical but I'm sticking to my own waypoint for now. :P

Take nothing but litter, leave nothing but a cleaner Drakensberg.
Last edit: 03 Feb 2016 19:31 by intrepid.
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