The preservation rate of trigonometric points of II, III and IV order in a selected area in the Zagorje surroundings was examined in the field. The test area includes the towns of Zagorje, Kisovec and Izlake and the surrounding hills. The test area is mostly hilly, overgrown and only a smaller part of the area is urban. The stabilisation of 50 trigonometric points was checked, from which 70% of markings have been preserved, i.e. 35 points. Fifteen points were not found in the field; it can be assumed that they have been destroyed. Excluding points stabilised on buildings (churches and antenna), there are 40 points in the area, of which 25 (63%) still exist. On forested and hilly terrain 71% of points is preserved, on agricultural lands 56% and on urban area 43%. The majority of points are stabilised with concrete, granite or natural stone. Additionally, five Zagorje Mine type trigonometric marks can also be found here: a hollow metal pipe is cemented into the ground, once used for a signal carrier. Nine trigonometric points are stabilised by church bell towers. For two of them we are sure that its roof was restored after the year in which the coordinates of these trigonometric points were measured for the last time. At the northern edge of the area the border between the former lands of Carniola and Styria once ran and two very old trigonometric marks made from natural stone blocks can still be found here.
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