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K-guarding of polyhedral terrainKaučič, Branko ; Žalik, BorutSite visibility analysis is an important research topic with many applications in Geographical Information Systems. This paper introduces a new paradigm in terrain guarding, called k-guarding. K ... -guarding is a generalization of the classic guarding problem where, instead of only one guard, each surface patch is guarded by at least k guards. Afterwards, two optimization problems based on k-guarding are defined: an optimum k-guarding, and a constrained k-guarding. There are three heuristic approaches - k-greedy add, k-stingy drop, and k-reverse greedy - that are proposed as a solution to the above-mentioned optimization problems. The first two are known approaches adapted to k-guarding, while k-reverse greedy is a new, original heuristic. The heuristics are compared using actual topographic surfaces. It is shown that our approach (k-reverse greedy) gives on average the best near optimum solutions. The most surprising finding of the experiments is that the combination of heuristics introduced here yields even better resultsSource: International journal of geographical information science. - ISSN 1365-8816 (Vol. 18, no. 7, oct./nov. 2004, str. 709-718)Type of material - article, component part ; adult, seriousPublish date - 2004Language - englishCOBISS.SI-ID - 13536776
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source: International journal of geographical information science. - ISSN 1365-8816 (Vol. 18, no. 7, oct./nov. 2004, str. 709-718)
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Database name | Field | Year |
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Kaučič, Branko | 21047 |
Žalik, Borut | 06671 |
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