Standartization of large scale Geo-data sets

Abstract

The problems of the standartisation of large scale geo-data sets are analysed in the paper. Since 1990 in Lithuania geographical information systems (GIS) have been introduced in many spheres. Digital maps (DM) are the base of GIS. Large-scale topographical-engineering digital maps create the base of GIS, which are used in order to make cadastre, urban and engineering infrastructure solutions. Large-scale DM are made according to the results of geodetic field measurements or using large-scale aero-pictures. Today it is very important to unify different national and local specifications, which are used forming topographical sets. It is important to prioritize updating of topographical data at the national rather than local level, to determine types of themes and features. Quality management principles must be determined at the local level in order results corresponded to the requirements. Large-scale digital topographical data sets are becoming actual not only for the traditional users, such as exploiters of engineering communications or planners, but also for emergency agencies, telecommunication, transport enterprises, municipalities, environmental institutions. It is necessary to adjust content of large-scale digital map feature catalogue with all interested organizations and to determine possible local final requirements.