Author Topic: Where is the geographic centre of South Africa? (Read 17807 times)

Bie · « **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?

Heimer · « **Reply #141 on:** October 05, 2011, 06:03:32 pm »

Quote from: Lourens ツ on October 05, 2011, 05:24:44 pm

Here are Grim's points in a gpx file.

Thanks Lourens

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

Interesting will be the one in Limpopo

Vatso! · « **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!

Heimer · « **Reply #143 on:** January 24, 2012, 04:40:50 pm »

So het iemand al foto's gaan neem?

White Rhino · « **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;

Fudmucker · « **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...!

Heimer · « **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

Fudmucker · « **Reply #147 on:** March 29, 2012, 07:43:32 pm »

Quote from: Heimer 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

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.

Heimer · « **Reply #148 on:** March 29, 2012, 07:46:01 pm »

Quote from: Fudmucker on March 29, 2012, 07:43:32 pm

Quote from: Heimer 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

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.

I thought so, but the Freestate one take us even deeper into a marsh next to a dam - that's what confused me.

White Rhino · « **Reply #149 on:** March 30, 2012, 05:32:43 am »

Quote from: Fudmucker 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...!

Thanks Fud, I've loaded that point.

What remains is to plant something to mark the spot, take some pics

Fudmucker · « **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...?

J-dog · « **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.

White Rhino · « **Reply #152 on:** March 30, 2012, 07:35:33 am »

Here's the SA Centroid's location ...

Heimer · « **Reply #153 on:** March 30, 2012, 02:45:07 pm »

Quote from: Fudmucker 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...?

That is already zoomed in ....

Sláinte Mhaith · « **Reply #154 on:** March 30, 2012, 03:07:09 pm »

Quote from: Heimer on March 29, 2012, 07:46:01 pm

I thought so, but the Freestate one take us even deeper into a marsh next to a dam - that's what confused me.

Fudmucker · « **Reply #155 on:** March 30, 2012, 03:18:46 pm »

Quote from: J-dog 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.

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

Heimer · « **Reply #156 on:** March 30, 2012, 03:47:58 pm »

Quote from: Sláinte Mhaith on March 30, 2012, 03:07:09 pm

Quote from: Heimer on March 29, 2012, 07:46:01 pm
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.

Fudmucker · « **Reply #157 on:** March 30, 2012, 03:58:54 pm »

It was plotted with Mapsource...

Perhaps you have a different version?

Heimer · « **Reply #158 on:** March 30, 2012, 04:04:43 pm »

Quote from: Fudmucker on March 30, 2012, 03:58:54 pm

It was plotted with Mapsource...
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

Sláinte Mhaith · « **Reply #159 on:** March 30, 2012, 05:03:39 pm »

Quote from: Heimer on March 30, 2012, 04:04:43 pm

Quote from: Fudmucker on March 30, 2012, 03:58:54 pm
It was plotted with Mapsource...
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.