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Author Topic: Where is the geographic centre of South Africa?  (Read 12265 times)

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Offline Bie

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Re: Where is the geographic centre of South Africa?
« Reply #140 on: October 05, 2011, 05:25:24 pm »
Ek sien jou punt is taamlik meer Oos as die ander, nou wonder ek net, het jy onthou om Lesotho uit te sny?
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Offline Heimer

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Re: Where is the geographic centre of South Africa?
« Reply #141 on: October 05, 2011, 06:03:32 pm »
Here are Grim's points in a gpx file.  :thumleft:

Thanks Lourens

I see most point are close to a road and fairly accessible.

Interesting will be the one in Limpopo  O0 O0 O0

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Offline Vatso!

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Re: Where is the geographic centre of South Africa?
« Reply #142 on: January 24, 2012, 04:36:40 pm »
Gents, I know I'm a bit late with this info but the official center of RSA is a small station known as Emmaus - halfway between Petrusburg and Kimberley. It seems as if Grim has the spot covered!
"Generaal, ik heb nog drie patronen en ik heb nog de kans drie Engelschen neer te schieten alvorens mijn positie te verlaten".  Burger van der Merwe aan Genl J.H. de La Rey, Driefontein, 10 Maart 1900.
 

Offline Heimer

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Re: Where is the geographic centre of South Africa?
« Reply #143 on: January 24, 2012, 04:40:50 pm »
So het iemand al foto's gaan neem?

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Offline White Rhino

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Re: Where is the geographic centre of South Africa?
« Reply #144 on: March 29, 2012, 12:39:47 pm »
Has anyone marked the Centroid yet. I'm heading there on my way to Lesotho from Prieska. I thing that some token need to be left there to mark the spot. Any suggestions:

- Planting a Tree - and tag it;
- Plant a Flag with a WD paw;
I'd rather have a full bottle in front of me than a full frontal lobotomy
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Offline Fudmucker

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Re: Where is the geographic centre of South Africa?
« Reply #145 on: March 29, 2012, 02:32:30 pm »
I plotted the centroids.
I also plotted practical centroids that you can identify on the ground.
Happy ride...!

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Offline Heimer

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Re: Where is the geographic centre of South Africa?
« Reply #146 on: March 29, 2012, 05:30:24 pm »
That is very cool Fudmucker - I would like to see some pictures as folks pass by these points.

B.t.w please explain the difference between centroid and practical centroid
« Last Edit: March 29, 2012, 05:34:30 pm by Heimer »

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Offline Fudmucker

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Re: Where is the geographic centre of South Africa?
« Reply #147 on: March 29, 2012, 07:43:32 pm »
That is very cool Fudmucker - I would like to see some pictures as folks pass by these points.

B.t.w please explain the difference between centroid and practical centroid

The centroid is the deduced geographic centroid.
Say, for example, it is in the middle of a dam, or a factory, or a golf course...?
How do you identify the exact position on the ground...?
So I determined a nearby point that is easily found and verified - a street intersection, a bridge over a river, etc - and called them the "Practical Centroid".
That saves you mucking about in the marsh with your GPS until the co-ordinates match.  ;D
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Offline Heimer

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Re: Where is the geographic centre of South Africa?
« Reply #148 on: March 29, 2012, 07:46:01 pm »
That is very cool Fudmucker - I would like to see some pictures as folks pass by these points.

B.t.w please explain the difference between centroid and practical centroid

The centroid is the deduced geographic centroid.
Say, for example, it is in the middle of a dam, or a factory, or a golf course...?
How do you identify the exact position on the ground...?
So I determined a nearby point that is easily found and verified - a street intersection, a bridge over a river, etc - and called them the "Practical Centroid".
That saves you mucking about in the marsh with your GPS until the co-ordinates match.  ;D

 :thumleft: I thought so, but the Freestate one take us even deeper into a marsh next to a dam - that's what confused me.
« Last Edit: March 29, 2012, 07:47:11 pm by Heimer »

Matriek getuigskrif 1979: ........... is 'n vriendelike seun met volop selfvertroue. Hy tree soms vreemd op. Die skool se beste wense vergesel hom.
 

Offline White Rhino

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Re: Where is the geographic centre of South Africa?
« Reply #149 on: March 30, 2012, 05:32:43 am »
I plotted the centroids.
I also plotted practical centroids that you can identify on the ground.
Happy ride...!



Thanks Fud, I've loaded that point. :thumleft:

What remains is to plant something to mark the spot, take some pics :biggrin:
I'd rather have a full bottle in front of me than a full frontal lobotomy
Nothing clears the head like a throttle twisted and the fresh air on the tip of the nose

Beta 300RR, WR450 Rallye, KTM990 Adv, HP2, HPN635, 1200GS LC
 

Offline Fudmucker

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Re: Where is the geographic centre of South Africa?
« Reply #150 on: March 30, 2012, 06:27:35 am »
Heimer, that FS Practical Centroid should be at a 270+degree corner in the S482.
Perhaps if you zoom in a little...?  
« Last Edit: March 30, 2012, 06:28:28 am by Fudmucker »
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Offline J-dog

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Re: Where is the geographic centre of South Africa?
« Reply #151 on: March 30, 2012, 06:41:40 am »
Fock 'n winters claim it's 22 miles NW of Kimberley, and I'll have to go with them. They sound authoritative.
 

Offline White Rhino

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Re: Where is the geographic centre of South Africa?
« Reply #152 on: March 30, 2012, 07:35:33 am »
Here's the SA Centroid's location ...

I'd rather have a full bottle in front of me than a full frontal lobotomy
Nothing clears the head like a throttle twisted and the fresh air on the tip of the nose

Beta 300RR, WR450 Rallye, KTM990 Adv, HP2, HPN635, 1200GS LC
 

Offline Heimer

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Re: Where is the geographic centre of South Africa?
« Reply #153 on: March 30, 2012, 02:45:07 pm »
Heimer, that FS Practical Centroid should be at a 270+degree corner in the S482.
Perhaps if you zoom in a little...?  

That is already zoomed in ....  ???

Matriek getuigskrif 1979: ........... is 'n vriendelike seun met volop selfvertroue. Hy tree soms vreemd op. Die skool se beste wense vergesel hom.
 

Offline Sláinte Mhaith

Re: Where is the geographic centre of South Africa?
« Reply #154 on: March 30, 2012, 03:07:09 pm »
:thumleft: I thought so, but the Freestate one take us even deeper into a marsh next to a dam - that's what confused me.

???
 

Offline Fudmucker

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Re: Where is the geographic centre of South Africa?
« Reply #155 on: March 30, 2012, 03:18:46 pm »
Fock 'n winters claim it's 22 miles NW of Kimberley, and I'll have to go with them. They sound authoritative.

Anyone with the name Fock'n Winters should be ignored.
Now if it was Fock'n Somers I would agree...  :mwink:
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Offline Heimer

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Re: Where is the geographic centre of South Africa?
« Reply #156 on: March 30, 2012, 03:47:58 pm »
:thumleft: I thought so, but the Freestate one take us even deeper into a marsh next to a dam - that's what confused me.

???


??? indeed. I open it with mapsource and that is where it takes me - next to a dam.

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Offline Fudmucker

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Re: Where is the geographic centre of South Africa?
« Reply #157 on: March 30, 2012, 03:58:54 pm »
It was plotted with Mapsource...  :deal:
Perhaps you have a different version?
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Offline Heimer

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Re: Where is the geographic centre of South Africa?
« Reply #158 on: March 30, 2012, 04:04:43 pm »
It was plotted with Mapsource...  :deal:
Perhaps you have a different version?

Mapsource Version 6.16.3.

Both Tracks4Africa 11.10.04 and SA topo 2011.3 show it next to that dam

All the other spots seem correct
« Last Edit: March 30, 2012, 04:09:53 pm by Heimer »

Matriek getuigskrif 1979: ........... is 'n vriendelike seun met volop selfvertroue. Hy tree soms vreemd op. Die skool se beste wense vergesel hom.
 

Offline Sláinte Mhaith

Re: Where is the geographic centre of South Africa?
« Reply #159 on: March 30, 2012, 05:03:39 pm »
It was plotted with Mapsource...  :deal:
Perhaps you have a different version?

Mapsource Version 6.16.3.

Both Tracks4Africa 11.10.04 and SA topo 2011.3 show it next to that dam

All the other spots seem correct

Mapsource version will not make a difference but the map version might.
The points on both images above seem a similar distance from the road taking scale into account. Mine just shows an additional road while yours show a bigger dam.
Did you use T4A for that screenshot? SA topo should show the same road as I have.