Drakensberg Caves GPS Co-ordinates

11 Feb 2010 14:48 #945 by pjvrey
pjvrey created the topic: Drakensberg Caves GPS Co-ordinates
** This thread discusses the content article: Drakensberg Caves GPS Co-ordinates **

Just check your altitude on Marble baths cave 1.

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11 Feb 2010 15:04 #946 by intrepid
intrepid replied to: Re:Drakensberg Caves GPS Co-ordinates
pjvrey wrote:

** This thread discusses the content article: Drakensberg Caves GPS Co-ordinates **

Just check your altitude on Marble baths cave 1.

Thanks, corrected. Should have been 1810m.

Take nothing but litter, leave nothing but a cleaner Drakensberg.

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09 Jul 2014 19:14 #61271 by GuyP
GuyP replied to: Drakensberg Caves GPS Co-ordinates
This is a brilliant section of information. It should be made available to all.

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10 Jul 2014 08:05 #61274 by ghaznavid
ghaznavid replied to: Drakensberg Caves GPS Co-ordinates
note that Dave G's website also has a great list of cave GPS co-ords (see www.berg.co.za ). The GPS track in the downloads section with co-ords of many of the Berg caves is great - all Berg regulars should load it onto their GPS :thumbsup:

Available at www.vertical-endeavour.com/downloads/viewdownload/8-drakensberg-caves/5-gps-data-of-caves-in-the-ukhahlamba-drakensberg-park.html

"Getting to the top is optional. Getting down is mandatory." - Ed Viesturs

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03 Feb 2016 09:54 - 03 Feb 2016 10:22 #66816 by mayake
mayake replied to: Drakensberg Caves GPS Co-ordinates
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
ghaznavid replied to: Drakensberg Caves GPS Co-ordinates
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 optional. Getting down is mandatory." - Ed Viesturs
The following user(s) said Thank You: mayake

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03 Feb 2016 10:21 - 03 Feb 2016 10:30 #66823 by mayake
mayake replied to: Drakensberg Caves GPS Co-ordinates
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
ghaznavid replied to: Drakensberg Caves GPS Co-ordinates
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 optional. Getting down is mandatory." - Ed Viesturs
Last Edit: 03 Feb 2016 10:42 by ghaznavid.
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03 Feb 2016 14:01 #66827 by Papa Dragon
Papa Dragon replied to: Drakensberg Caves GPS Co-ordinates
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
intrepid replied to: Drakensberg Caves GPS Co-ordinates

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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