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An algorithm for localised contour removal over steep terrain / William A Mackaness in Cartographic journal (the), vol 43 n° 2 (July 2006)  

Public [article]  inCartographic journal (the) > vol 43 n° 2 (July 2006) . - pp 144 - 156 Titre : An algorithm for localised contour removal over steep terrain Type de document : Article/Communication Auteurs : William A Mackaness, Auteur ; M. Steven, Auteur Année de publication : 2006 Article en page(s) : pp 144 - 156 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] courbe de niveau [Termes IGN] isoligne [Termes IGN] modèle numérique de surface [Termes IGN] représentation du relief Résumé : (Auteur) Isolines have proved to be a highly effective way of conveying the shape of a surface (most commonly in the form of height contours to convey geographical landscape). Selecting the right contour interval is a compromise between showing sufficient detail in flat regions, whilst avoiding excessive crowding of lines in steep and morphologically complex areas. The traditional way of avoiding coalescence and confusion across steep regions has been to manually remove short sections of intermediate contours, while retaining index contours. Incorporating humans in automated environments is not viable. This research reports on the design, implementation and evaluation of an automated solution to this problem involving the automatic identification of coalescing lines, and removal of line segments to ensure clarity in the interpretation of contour information. Evaluation was made by subjective comparison with Ordnance Survey products. The results were found to be very close to the quality associated with manual techniques. Copyright British Cartographic Society Numéro de notice : A2006-609 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870406X114630 En ligne : https://doi.org/10.1179/000870406X114630 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28332 [article]

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