USING THE AUTOMATIC VECTORISATION METHOD IN GENERATING THE VECTOR ALTIMETRY OF THE HISTORICAL VLTAVA RIVER VALLEY

Abstract

The article describes, in detail, the generation procedure of vector altimetry of an upper and middle course of the Vltava River historical valley. By the historical valley, the shape of the river valley before the construction of dams on the Vltava River in the second half of the 20th century is understood. The vector altimetry will serve as the base for creating a 3D model of this valley. The initial input data were old maps, specifically scanned first-edition prints of the State Map 1 : 5 000 - Derived (SMO-5). By combining automatic and manual vectorisation, the altimetry component of these maps (contour lines and spot elevations) will be converted to a vector format. Individual processing steps, including the description of automatic vectorisation in the ArcScan extension to the ArcGIS system, together with examples of the results, are presented in the text below.