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Research in support of MGE map generalizer / Robert Weibel (1995)

Public Titre : Research in support of MGE map generalizer : an evaluation of MGE map generalizer, interim report 3 October 1994 - 3 April 1995, submitted to intergraph scanning and cartography, Hoofddorp, the Netherlands Type de document : Rapport Auteurs : Robert Weibel, Auteur ; R. Ehrliholzer, Auteur Editeur : Zurich : Université de Zurich Année de publication : 1995 Importance : 36 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] cartographie numérique [Termes IGN] généralisation cartographique [Termes IGN] interface logicielle [Termes IGN] MGE [Termes IGN] sémiologie graphique [Termes IGN] système d'information géographique Index. décimale : 39.00 Cartographie - généralités - Cartologie Résumé : (Auteur) This document presents a first evaluation of MGE Map Generalizer. It is part of a one-year project at the Department of Geography, University of Zurich entitled “Research in Support of MGE Map Generalizer”, an effort which is sponsored by Intergraph EHQ through a hardware and software loan. The first half-year period was spent on a systematic assessment of the functions offered by MGMG, and initial suggestions for possible enhancements were made. MGMG is an attractive and interesting product. It is generally easy to use, and the computational performance is adequate two factors which are prerequisites for enabling a truly interactive workflow. In its present state, MGMG is probably most useful for generalizing data at large and medium scales (> 1:50,000), particularly for tasks of building and road generalization. At smaller scales, limitations of symbolization and display facilities presently restrict the applicability of the package. Since symbol size and width does not vary with the zoom level of the working view, it is not possible to visually check for feature overlaps or coalescence. This presents a particular problem to the generalization of point and linear features whose size and width is mainly dictated by symbolization; it does not, however, cause difficulties to the treatment of area features (e.g., land use, forest polygons) at smaller scales. We consider MGMG as an important strategic product in Intergraph's range of software solutions for the mapping and GIS market. There is an ever increasing interest in the market for better generalization functionality which is sadly missing from competitors' products. Most potential mapping customers are in a transition to digital production or have already accomplished it. Thus, the problem of assessing the possible productivity gain by digital over manual techniques has almost become secondary. Nevertheless, we estimate that a productivity gain can already be achieved with the current solution. In terms of the quality of generalization operators and related functions, the present version provides an excellent basis for further enhancement and can be fine-tuned to a maturity with relatively little effort. For the second half of the project term, further research will be pursued concentrating on the specification of possible enhancements with respect to generalization operators as well as functions for design support and quality evaluation. Numéro de notice : 18829 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=41567

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
18829-01	39.00	Livre	Centre de documentation	Cartographie	Disponible