Analiza morfometryczna węzła dolinnego Warty, Widawki i Grabi z wykorzystaniem algorytmu ISODATA
Morfometric analysis of the valley junction of the Warta, Widawka and Grabia Rivers using the ISODATA algorithm

Summary/Abstract: The article shows the application of GIS method for an automatic identification of landforms in the area of junction formed by the Warta, Widawka and Grabia Rivers. The analysis is based on Digital Elevation Model designed in compliance with topographical maps on a scale of 1:10 000 and its DEM-based derivatives. DEM-based maps have been built with use of the ISODATA algorithm in order to classify the morphometric characteristics of terrain. The landforms have been determined on the basis of numeric terrain model derivatives and presented on a morphometric map. In order to verify the results, the identified landforms were juxtaposed with the geomorphological mapping created during the preparation of detailed geological maps. The comparison showed the validity of almost all indicated landforms and their considerable spatial differentiation. The spatial and localisation differences of landforms have been presented in the form of map sets.

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