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- Title
Transformation of Areal Objects Into Linear Objects, Regarding the Map Scale.
- Authors
Szombara, Stanisław
- Abstract
The Digital Landscape Model is characterized by preserving strict georeference of the content and the included classes of the objects on a definite level of datail. In the process of digital cartographic generalization, it is often necessary to change the objects into the ones of a lower level of datail than the source level, preserving their strict georeference. One of the generalization operations is a partial or total change of areal objects into linear objects (collapse). This transformation is used in the mentioned above model, for the Digital Cartographic Model. In the solution proposed by the Author, the change of the dimension of the areal objects (of natural origin) into linear objects is carried out by the constructions called Medial Axis Transform (MAT) and the elementary disc. The idea of the elementary disc is based on the Perkal's method and the standard based on the Chrobak's elementary triangle. Owing to the combination of these elements the operator of digital cartographic generalization was obtained, making an unambiguous result (independent from the operator). In the process of automatic cartographic generalization, the presented method allows the transformation of the areal object into a linear object in any scale (dependant on the drawing recognizability norm), in an unambiguous way, as well as regarding the detection and solution of graphical conflicts arising during the collapse.
- Subjects
MAP scales; CARTOGRAPHY; MATHEMATICAL geography; MEASUREMENT of distances; GEOLOGICAL mapping
- Publication
Geoinformatica Polonica, 2013, Vol 12, p25
- ISSN
1642-2511
- Publication type
Article
- DOI
10.2478/v10300-012-0010-5