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I need help to identify the coordinate system of the below point in Guinea

{"Name":"Simandou",
 "Latitude":0.29482446877975,
 "Longitude": 0.08190694324693,
 "k1":0.22528363047002,
 "k2":1.4976525821596}

I am not able to identify the unit of the Lat and Long but I looked for the Name on Google Earth and I found the equivalent in decimal degrees which is 8.656198, -8.887153?

How do I convert the Lat/Long of the point to decimal degrees?

  • Do you have more sample points? – AndreJ Nov 23 '16 at 7:46
  • Yes I have these points: {Yomou Zogota Lat:0.271463293 Long:0.081642261 k1:5.048622366 k2:42.88732394 and Simandou South Lat:0.292255961 Long:0.081894421 k1:3.364667747 k2:33.09859155 – Joseph Bechara Nov 23 '16 at 14:16
  • Unfortunately, these do not make much sense to me. Any chance to ask the data provider? – AndreJ Nov 24 '16 at 6:36
  • As these locations are associated with Rio Tinto Iron Ore mines/prospects, just wondering whether this might just be some local grid, or offset from a grid, for some mining purpose – nmtoken Nov 25 '16 at 23:39
  • Yes they are associate to iron ore mines. Any idea how to find the local grid? – Joseph Bechara Dec 4 '16 at 11:38
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That Lat and Lon may just be regular WGS84 decimal degrees, but Guinea is not near the equator, so it probably isn't.

Google Maps puts Simandou at:

9°10'04.8"N 9°09'53.8"W
9.168005, -9.164953

And that is not even close.

I think you need more information as it doesn't look like a UTM coordinate either.

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