AFREF : lesson learnt after the first GNSS reference station launched
Van Cranenbroeck, Joel
The African Geodetic Reference Frame (AFREF) is conceived as a unified geodetic reference frame for Africa - the fundamental basis for the national and regional reference networks. In March 2007, the first permanent GNSS reference station was launched in Kenya. Leica Geosystems supports the project with its knowledge, as well as via donation of a complete system. Currently, African countries each maintain their own geodetic reference system. In the past, this resulted in mismatched maps at national borders or even in the same country; in Kenya alone there are currently two different mapping coordinate systems in use. The African Geodetic Reference Frame (AFREF) shall build a fundamental basis for a continent-wide reference network system, consisting of permanent Global Navigational Satellite Systems (GNSS) stations. The goal is to provide users free access to GNSS data and products, with a maximum distance of 500 km from the next reference station - anywhere in Africa.
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