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Extended cartographic interfaces for open distributed processing / P. Sykora in Cartographica, vol 42 n° 3 (September 2007)  

Public [article]  inCartographica > vol 42 n° 3 (September 2007) . - pp 209 - 218 Titre : Extended cartographic interfaces for open distributed processing Type de document : Article/Communication Auteurs : P. Sykora, Auteur ; O. Schnabel, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 209 - 218 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] carte thématique [Termes IGN] cartographie dynamique [Termes IGN] diffusion de données [Termes IGN] interface web [Termes IGN] ontologie [Termes IGN] spécification de contenu [Termes IGN] symbole graphique [Termes IGN] temps réel Résumé : (Auteur) In recent years, cartographic Web applications have evolved from closed monolithic applications to open distributed systems in which real-time map rendering components and services play an important role. This progress has required new and flexible ways of defining map symbolization. The development of cartographic interfaces needed to describe the desired map output offers the means to extend current symbolization approaches and adapt the portrayal of data to the most demanding requirements in the area of distributed thematic mapping. This article analyses, in the context of open distributed processing, some of the existing cartographic interfaces that can be used for various cartographic applications and services. At the same time, the article offers a look at the most recent research efforts in this area. Copyright University of Toronto Press Numéro de notice : A2007-488 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.42.3.209 En ligne : https://doi.org/10.3138/carto.42.3.209 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28851 [article]

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031-07031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Map projections minimizing distance errors / J.R. Gott in Cartographica, vol 42 n° 3 (September 2007)  

Public [article]  inCartographica > vol 42 n° 3 (September 2007) . - pp 219 - 234 Titre : Map projections minimizing distance errors Type de document : Article/Communication Auteurs : J.R. Gott, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 219 - 234 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] analyse comparative [Termes IGN] erreur moyenne quadratique [Termes IGN] Lune [Termes IGN] Mars (planète) [Termes IGN] planète [Termes IGN] projection [Termes IGN] projection azimutale [Termes IGN] projection équidistante Résumé : (Auteur) Maps convey important information about distances between pairs of points. It is therefore desirable to minimize the errors made in representing distances between pairs of points on maps. Since it is just as bad to have two points on the map at twice their proper separation as to have them at half their proper separation, it is the root-mean-square (rms) logarithmic distance between random points in the mapped region that we will minimize. The best previously known projection of the entire sphere for distances is the Lambert equal-area azimuthal, with an rms logarithmic distance error of ó = 0.343. By way of comparison, the Mercator projection has ó = 0.444 and the Mollweide, ó = 0.390. We present three new projections - the Gott equal-area elliptical, with perfect shapes on the central meridian; the Gott-Mugnolo equal-area elliptical; and the Gott-Mugnolo azimuthal, with rms logarithmic distance errors of ó 0.365, ó = 0.348, and ó = 0.341 respectively - that improve on previous projections of their type. The Gott-Mugnolo azimuthal projection has the lowest distance errors of any map and is produced by a new technique using "forces" between pairs of points on a map, which make the points move so as to minimize ó. The Gott equal-area elliptical projection produces a particularly attractive map of Mars, and the Gott-Mugnolo azimuthal projection produces an interesting map of the Moon, both of which we also show. Copyright University of Toronto Press Numéro de notice : A2007-489 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article DOI : 10.3138/carto.42.3.219 En ligne : https://doi.org/10.3138/carto.42.3.219 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28852 [article]

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The discourse and discipline of GIS / K. St Martin in Cartographica, vol 42 n° 3 (September 2007)  

Public [article]  inCartographica > vol 42 n° 3 (September 2007) . - pp 235 - 248 Titre : The discourse and discipline of GIS Type de document : Article/Communication Auteurs : K. St Martin, Auteur ; J. Wing, Auteur Année de publication : 2007 Article en page(s) : pp 235 - 248 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] formation [Termes IGN] géographie générale [Termes IGN] SIG participatif [Termes IGN] système d'information géographique Résumé : (Auteur) Despite the many alternative insights produced within human geography since the height of the spatial science tradition of the 1960s and those within geographic information systems (GIS) itself, we still observe in our classrooms, hiring committees, and textbooks a dominant and singular understanding of GIS that fixes its meaning in ways that marginalize "non-GIS" geography. We are concerned about the effect that this valuation of GIS and devaluation of its others might have on the discipline of geography. In what follows, we report on our examination of the dominant discourse of GIS across a variety of sites in numerous academic, commercial, and educational sources where we found it to be repeatedly performed in ways that give particular meaning and power to "GIS." We identify four characteristics attributed to GIS by and through this widespread discourse. We then discuss the effect of this discourse and, in particular, what it might mean to the discipline of geography. Finally, we suggest an exploration of "heterodox GIS" as a discursive strategy that we should deploy in our classrooms, departments, and beyond, as well as a political project aimed at destabilizing a singular and orthodox GIS. Such strategies should not strive to undermine or negate GIS but, rather, should aim to negate the notion that GIS is a single thing, linearly progressing, inherently expanding, and universally applicable. Copyright University of Toronto Press Numéro de notice : A2007-490 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.3138/carto.42.3.235 En ligne : https://doi.org/10.3138/carto.42.3.235 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28853 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-07031	RAB	Revue	Centre de documentation	En réserve L003	Disponible