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.
Highlights
The Vltava River, the longest and, apparently, the most famous Czech river, stretches over a territory where significant changes occurred in the river landscape in the 20th century due to the construction of the so-called Vltava Cascade
One of the outputs will be a 3D model of the historical Vltava River valley, created on the basis of the vector altimetry obtained from old maps [3]
The aim of this research is to find a suitable method for creating the vector altimetry of the Vltava River historical valley from old maps
Summary
The Vltava River, the longest and, apparently, the most famous Czech river, stretches over a territory where significant changes occurred in the river landscape in the 20th century due to the construction of the so-called Vltava Cascade. The Vltava Cascade is a series of 9 dams built in the upper and middle course of the river. The objective of the Ministry of Culture NAKI DG18P02OVV037 project, “Vltava – transformation of historical landscape as a result of floods, dam’s creation and land-use changes along with cultural and social activities in the river neighbourhood” is to present, in a complex way, the changes in the landscape occurring in the upper and middle course of the Vltava River. Old maps are one of the main sources of information for the reconstruction of the extinct landscapes and for the creation of historical digital terrain models [4, 5]
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