This is what I calculate with some pictures to illustrate my sources....
Western Point 28°37'52.00"S 16°27'20.00"E
Eastern Point 26°51'27.52"S 32°53'28.86"E
Norther Point 22° 7'30.01"S 29°39'25.80"E
Southern Point 34°50'0.00"S 20° 0'0.00"E
Centre point 28°28'45.00"S 24°40'23.30"E
Distance from Kimberly 28 kms NNW (343.68°)
The centre point is 12km from the N12 and 5kms after crossing the Vaal River.
Looks like a few quarries around with some farming in the general area.
