Preliminary analysis of quality of contour lines using smoothing algorithms(Article)(Open Access)
- aUniversity of Novi Sad, Faculty of Technical Sciences, Trg Dositeja Obradovića 6, Novi Sad, 21000, Serbia
- bUniversity of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Geotechnology, Mining and Environment, Aškerčeva 12, Ljubljana 1000, Serbia
- cUniversity of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department for Ecology and Technoeconomics, Njegoševa 12, Belgrade, 11000, Serbia
- dUniversity of Ljubljana, Faculty of Natural Sciences and Engineering, Chair for Mine Surveying and Applied Geophysics, Aškerčeva 12, Ljubljana 1000, Serbia
Abstract
In this paper several well-known filtering techniques were compared in the purpose of automatic line generalization. The used methods for line simplification are digital first order low-pass filter, Savitzky-Golay (SG) filter and Whittaker filter. Two versions of the algorithm for line feature generalization were tested, from source scale 1:25 000 towards target scale of 1:100 000 and from source scale 1:25 000 towards scale of 1:50 000. Also, GPS data filtering for the target scale 1:50 000 was tested. The first version of the algorithm considers that there are no control data, and the filtering parameter is dictated by the desired accuracy for the target scale. The second version involves control data in the target scale. This means that the optimal value for the filtering parameter is the value for which the difference between input and control data is the smallest. Analysis showed that the SG filter yielded the best results in general. The proposed filters can be considered as a new solution for automated cartographic line simplification. © 2019, Strojarski Facultet. All rights reserved.
Indexed keywords
| Engineering controlled terms: | Contour measurementFiltrationImage qualityLow pass filtersMappingMaps |
|---|---|
| Engineering uncontrolled terms | Contour lineFiltering techniqueGeneralizationLine simplificationPreliminary analysisSavitzky-Golay filterSimplificationSmoothing algorithms |
| Engineering main heading: | Quality control |
- ISSN: 13303651
- Source Type: Journal
- Original language: English
- DOI: 10.17559/TV-20180827150721
- Document Type: Article
- Publisher: Strojarski Facultet
Pal, A.; University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Geotechnology, Mining and Environment, Aškerčeva 12, Ljubljana, Serbia;
© Copyright 2019 Elsevier B.V., All rights reserved.
Cited by 2 documents
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