The GeoConnexion magazine publishes an article entitled: "One continent, one representation". IGN FI, IGN France and Uneca look at progress on AFREF, a common geodetic reference frame that can be used by all the countries in Africa.
Geodesy has long been a specialist field. It was first of all used to understand the Earth’s shape and dimensions, then to position ourselves in the best way possible on the Earth’s surface. But while rich countries started to create networks that enabled them to position points homogeneously across their entire territory down to the nearest decimetre, African countries remained with just a few astronomical points the accuracy of which could only be counted in decametres for many years.