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Computation and visualisation of the accuracy of old maps using differential distortion analysis / Manuel Claeys Boùùaert in International journal of geographical information science IJGIS, vol 30 n° 7- 8 (July - August 2016)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 30 n° 7- 8 (July - August 2016) . - pp 1255 - 1280 Titre : Computation and visualisation of the accuracy of old maps using differential distortion analysis Type de document : Article/Communication Auteurs : Manuel Claeys Boùùaert, Auteur ; Bernard De Baets, Auteur ; Soetkin Vervust, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 1255 - 1280 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie [Termes descripteurs IGN] cartographie ancienne [Termes descripteurs IGN] cartographie numérique [Termes descripteurs IGN] Déformation [Termes descripteurs IGN] distorsion d'image [Termes descripteurs IGN] indicatrice de Tissot [Termes descripteurs IGN] point d'appui [Termes descripteurs IGN] projection [Termes descripteurs IGN] visualisation Résumé : (Auteur) The accuracy of old maps can hold interesting historical information, and is therefore studied using distortion analysis methods. These methods start from a set of ground control points that are identified both on the old map and on a modern reference map or globe, and conclude with techniques that compute and visualise distortion. Such techniques have advanced over the years, but leave room for improvement, as the current ones result in approximate values and a coarse spatial resolution. We propose a more elegant and more accurate way to compute distortion of old maps by translating the technique of differential distortion analysis, used in map projection theory, to the setting where an old map and a reference map are directly compared. This enables the application of various useful distortion metrics to the study of old maps, such as the area scale factor, the maximum angular distortion and the Tissot indicatrices. As such a technique is always embedded in a full distortion analysis method we start by putting forward an optimal analysis method for a general-purpose study, which then serves as the foundation for the development of our technique. There to, we discuss the structure of distortion analysis methods and the various options available for every step of the process, including the different settings in which the old map can be compared to its modern counterpart, the techniques that can be used to interpolate between both, and the techniques available to compute and visualise the distortion. We conclude by applying our general-purpose method, including the differential distortion analysis technique, to an example map also used in other literature. Numéro de notice : A2016-305 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2015.1127377 En ligne : http://dx.doi.org/10.1080/13658816.2015.1127377 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80903 [article]

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A spatial approach to forest-management optimization: linking GIS and multiple objective genetic algorithms / E.I. Ducheyne in International journal of geographical information science IJGIS, vol 20 n° 8 (september 2006)

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 8 (september 2006) . - pp 917 - 928 Titre : A spatial approach to forest-management optimization: linking GIS and multiple objective genetic algorithms Type de document : Article/Communication Auteurs : E.I. Ducheyne, Auteur ; R.R. DE Wulf, Auteur ; Bernard De Baets, Auteur Année de publication : 2006 Article en page(s) : pp 917 - 928 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes descripteurs IGN] algorithme génétique [Termes descripteurs IGN] forêt [Termes descripteurs IGN] forêt tempérée [Termes descripteurs IGN] optimisation (mathématiques) [Termes descripteurs IGN] outil d'aide à la décision [Termes descripteurs IGN] sylviculture Résumé : (Auteur) Forest-management decision-support systems are largely monolithic structures. Spatial details are left out during the optimization process and are elaborated during the operational planning. This might produce misleading results and plans that are impossible to implement. In this paper, a forest-management spatial decision-support systems is presented, in which spatial formulation needed for wildlife models is included during the optimization process. To this end, a multiple-objective genetic algorithm is combined with a geographical information system. An online spatial evaluation of the objective functions is made possible. This is illustrated by a pilot study in Kirkhill forest, Aberdeen. Copyright Taylor & Francis Numéro de notice : A2006-351 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28075 [article]

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