IGN

The Instituto Geográfico Nacional is a public entity, dependent on the Ministry of Public Works of Spain, attached to the General Secretariat of Institutional Relations and Coordination and in charge of a General Director who is also President of the National Geographic Information Center. His tasks are the observation, calculation and maintenance of geodetic networks, levelling networks and network of tide gauges. The formation and updating of the cartographic series of the National Topographic Map. And many others.