Georeferencing the Cadastral Map of the Krakow Region

ABSTRACT The article concerns the transformation of the nineteenth--century cadastral map in the cadastral coordinate system to the current Polish national coordinate system (PL-1992, EPSG:2180). This map provides source information on land ownership and shows the state of topography nearly 200 years ago. The task of changing the georeferencing was performed for its sections covering the area of Krakow, using information on the cadastral system in Western Galicia and the Krakow local coordinate system (ULK). A single-step algorithm is proposed and can be used to transform coordinates from the Krakow area. In particular, it can be used to georeference sections of a cadastral map. The advantage is its independence from unchanged topographic points. These points are either difficult to determine or there are few of them in that area. The accuracy of the coordinate transformation model is at the level of 30 cm and the actual accuracy – is about 1 m.