National Coordinate System Database contains data on national geodetic points, national network of permanent stations for positioning with the technology of global navigation satellite systems (hereinafter referred as: national network for global positioning) and the geographic coordinate network.
The database contains data about SLOvenian Absolute Model of Geoid from the year 2000 (SLOAMG2000). It is an astro-gravimetrical model, determined by a combined method. It is calculated by the least squares collocation method, using the "remove-restore" techniques. It refers to the GRS80 ellipsoid. The global geopotencial model EGM96 is used for the calculation. It is given in the form of a grid. The geoid model is used for the transformation of the ellipsoid heights (GNSS technology) into the normal-orthometric heights (above sea level) and vice versa. Heights above the sea level refers to the Slovenian height system SVS2000 with Trieste datum. The ondulation of geoid in Slovenia range from 44,140 to 48,724 m, with an average value of 46,453 m. Note: values are given only within the boundaries of Slovenia.
National Geodetic Points are part of the national geodetic networks and provide a reference frame i.e. geodetic datum. National geodetic Points, connected in the networks, together with geodetic measurement and, measurements processing mechanisms for the determination of their coordinates and their connection to the European reference system are all fundamental elements of a new coordinate reference system in the Republic of Slovenia. A national geodetic point is established when it is materialized (means physically established with a permanent designation) and when its coordinates are defined in a National coordinate reference system. Their coordinates must be determined with a high precision, accuracy and reliability. National Geodetic Points are a physical presentation of the Slovenian national coordinate reference system and provides a linkage to the European coordinate reference system - ESRS. They serve as reference points for the determination of position changes in time and determination of transformation models or parameters between old and new national coordinate reference system.