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National Mapping Agencies

A national mapping agency (NMA) is an organization designated by a national government to have responsibility for surveying and mapping the country and providing the resulting geographic information to those who need it. That basic role has taken on a variety of forms around the world.

NMAs typically focus on establishing geographic coordinate reference systems and collecting topographic base data, which include the major features of the landscape, such as roads, buildings, rivers, forests, and elevation. In some countries, the national mapping function is combined with cadastre or land registration. Functions such as seismology, metrology, hydrographic surveys, and boundary designation may also be included.

NMA data come from a variety of sources and may include geodetic surveys, topographic surveys, aerial and satellite imagery, records of land ownership ...

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