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  • In the state reference system it is possible to position parcels, objects, utilities, terraine, topographics objects both in vertical and horizontal sense. Whithin State reference system it is possible to determine: spatial (three-dimensional) reference system, horizontal (two-dimensional) reference system, vertical (one-dimensional) reference system, gravimetric and astronomical reference system. Spatial and horizontal reference system are defined with SREF and AGROS. SREF – Geodetic reference basis of Serbia relies on the Yugoslav reference framework – YUREF which represents the implementation of European framework – EUREF for the territory of Yugoslavia. The network points evenly cover the territory of the state with distance between each other of about 10km. With establishing the GPS reference network, a unique and homogenous mathematical basis for all geodetic, navigational and other activities on the entire territory of the Republic of Serbia is provided. With positioning reference GPS network points on the EUREF – Еuropean Reference Framework points, coordinates under a unique referent frame of Europe are determined. SREF network consists of 838 points.

  • Gravity network points has been established within state survey. Each point has its own coordinates. Fundamental benchmarks together with reference network points are included in the gravity network.

  • The precise levelling network consists of a set of permanently marked and easily accessible fundamental benchmarks. Temporary benchmarks can be main and supporting. They represent the points distributed at the distance less than 1.5 km in the form of levelling lines between the fundamental benchmarks.

  • Second order high accuracy leveling network is consisted of permanently marked and accessible fundamental and temporary benchmarks. Fundamental benchmarks represent the points approximately evenly distributed on the entire territory of the Republic of Serbia at the average distance of not less than 20 km, or not more than 50 km, which the complete precise levelling network relies on. Temporary benchmarks can be main and supporting. They represent the points distributed at the distance less than 1.5 km in the form of levelling lines between the fundamental benchmarks.

  • Active Geodetic Reference Base of Serbia - AGROS, is permanent service of precise satellite positioning for the teritory of Serbia. By AGROS establishing a necessary precondition was met enabling overcoming the problems regarding Reference geodetic Base in Serbia.

  • The trigonometric network consists of a set of points permanently marked and classified in two main and two additional orders according to hierarchy. Points are distributed evenly around country with average distance of 4 km.

  • The high accuracy levelling network consists of a set of permanently marked and easily accessible fundamental benchmarks. Temporary benchmarks can be main and supporting. They represent the points distributed at the distance less than 1.5 km in the form of levelling lines between the fundamental benchmarks.