Abstract

Maps are a fundamental requirement for all kinds of infrastructure and engineering projects. Maps are produced by various institutions and organizations for different purposes. The important issue is that these maps from different sources are combined, archived, and stored in way that facilitates the economic use of a country’s resources and promotes effective data exchange. For the combining and storing of maps produced by different institutions it is necessary to have accurate knowledge of the datum, coordinate system, projection and accuracy of the map, which is directly related to the datum, scope and accuracy of the national geodetic networks are used in map production. There have been considerable innovations in measurement technologies parallel to the general technological developments that have changed and improved national geodetic networks utilized in map production. This paper will investigate the role of the national geodetic networks in large scale map production in Turkey, taking into account changes in these networks and the geodesic structure and the development of national geodetic networks.

Key words: National geodetic networks, large scale map, the Turkish national fundamental GPS network, continuously operating reference stations-Turkey, global positioning system.