FIELD: formation of measuring chain.
SUBSTANCE: invention is related to field of formation of ground surface of points of reference land-surveying network which is geodetic network of special assignment required for coordinate support of state land cadastre, monitoring of land, land management and other operations of control over land fund of Russia. Ground reference boundary mark includes metal bar mounted in ground hole vertically. Mark is attached to its upper end and underground anchor is fixed on its lower end. Underground anchor is made of wedge-shaped meal plates with thickness over 1.0 mm and height equal to diameter of metal bar. Bases of wedge-shaped metal plates are made fast to lower end of metal bar and their vertexes are oriented towards mark and bent away from metal bar through angle under 45 degrees over length not more than radius of metal bar.
EFFECT: simplified design, manufacturing technology and installation of reference boundary mark with usage of inexpensive and accessible materials.
8 cl, 1 dwg
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