Konverze mezi rastrovými a vektorovými datami

Abstract

The aim of this thesis was to solve the problem of converting raster data to vector data within Geospatial Database Systems. The operation of the mentioned conversion is called vectorization. The thesis is divided into several parts, where the first part deals with different vectorization methods and their implementation. Subsequently, it was necessary to create a custom web application to visualize the polygons, test the correctness of the vectorization and provide a basic analysis. This involved data capturing the air pollution contribution of various pollutants in a few selected regions. The thesis itself would not have been possible without a database system with a geospatial extension to store and manipulate the data. In our case, a PostgreSQL database with a spatial extension PostGIS was used, which is readily available. Another tool used in the vectorization was ArcGIS, which was also marginally discussed.