Error Propagation in the Nigerian Geodetic Network: Imperative of GPS Observations to Strengthen Network

Geodetic Control Networks and by extension Survey and Mapping which is the foundation of all physical, social and economic development has suffered neglect in the hands of successive Governments in the developing countries. In some of these countries, maps as old as forty years are still the most current in their archives, while the process of re-observation of the Geodetic Control Networks which were established about fifty years ago, is yet to commence. For accurate and efficient policy decisions to be taken without bureaucratic bottlenecks, the development and utilization of Geographic Information System whose accuracy and effectiveness is dependent on an error free Geodetic Control Network cannot be overemphasized. The development of Satellite technology, especially its application in navigation through the use of GPS has opened a new vista in the observation and strengthening of Geodetic Control Networks worldwide. Most developed countries have utilized the GPS to modernize their Control Networks. It is high time the developing countries are made aware of the error in their existing control networks and the need to modernize and re-observe these networks using modern technology. (the Global positioning System (GPS))