Najstaršia banská mapa ešte raz: jej georeferencovanie a analýza

Abstract

The oldest known map of a mine in what is now Slovakia was drawn in 1568 and represents an adit named Gottes gab. The location of the mine is given only by the description “auf der Jeraba” (at Jarabá in the Low Tatras) and the exact whereabouts of the mine was unknown until recently. This article describes the methodology used to locate the adit using other mining maps of this area produced in the 18th century, which depicted some landmarks making geolocation possible – a toponym, segments of some country roads and two other mine entrances. The mining maps were georeferenced using historical geography, field research and a detailed DTM. The correctness of the georeferencing was validated by checking the scale (using the scale bar) and rotation parameters (comparing the magnetic north indications on the maps to the models of the historical magnetic declination). The second part of the paper contains a new interpretation of a unique feature of the Gottes gab map – a survey field book in tabular form, previously analyzed by Bílek (1967). Using statistical analysis we propose the most feasible formula for calculation of the survey line coordinates from the data table. The problems in this reconstruction of the mine survey line are explained using newer, 18th century maps of the same mine.