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The Equal Earth map projection / Bojan Šavrič in International journal of geographical information science IJGIS, Vol 33 n° 3-4 (March - April 2019)  

Public [article]  inInternational journal of geographical information science IJGIS > Vol 33 n° 3-4 (March - April 2019) . - pp 454 - 465 Titre : The Equal Earth map projection Type de document : Article/Communication Auteurs : Bojan Šavrič, Auteur ; Tom Patterson, Auteur ; Bernhard Jenny, Auteur Année de publication : 2019 Article en page(s) : pp 454 - 465 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] carroyage géographique [Termes IGN] mappemonde [Termes IGN] projection (équivalente) de Mollweide [Termes IGN] projection de Peters [Termes IGN] projection de Robinson [Termes IGN] projection sinusoïdale Résumé : (auteur) The Equal Earth map projection is a new equal-area pseudocylindrical projection for world maps. It is inspired by the widely used Robinson projection, but unlike the Robinson projection, retains the relative size of areas. The projection equations are simple to implement and fast to evaluate. Continental outlines are shown in a visually pleasing and balanced way. Numéro de notice : A2019-023 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2018.1504949 Date de publication en ligne : 07/08/2018 En ligne : https://doi.org/10.1080/13658816.2018.1504949 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91951 [article]

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Enhancing adaptive composite map projections: Wagner transformation between the Lambert azimuthal and the transverse cylindrical equal-area projections / Bernhard Jenny in Cartography and Geographic Information Science, Vol 45 n° 5 (August 2018)  

Public [article]  inCartography and Geographic Information Science > Vol 45 n° 5 (August 2018) . - pp 456 - 463 Titre : Enhancing adaptive composite map projections: Wagner transformation between the Lambert azimuthal and the transverse cylindrical equal-area projections Type de document : Article/Communication Auteurs : Bernhard Jenny, Auteur ; Bojan Šavrič, Auteur Année de publication : 2018 Article en page(s) : pp 456 - 463 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] cartographie dynamique [Termes IGN] projection azimutale équivalente de lambert [Termes IGN] projection conique [Termes IGN] projection cylindrique Résumé : (Auteur) The adaptive composite map projection technique changes the projection to minimize distortion for the geographic area shown on a map. This article improves the transition between the Lambert azimuthal projection and the transverse equal-area cylindrical projection that are used by adaptive composite projections for portrait-format maps. Originally, a transverse Albers conic projection was suggested for transforming between these two projections, resulting in graticules that are not symmetric relative to the central meridian. We propose the alternative transverse Wagner transformation between the two projections and provide equations and parameters for the transition. The suggested technique results in a graticule that is symmetric relative to the central meridian, and a map transformation that is visually continuous with changing map scale. Numéro de notice : A2018-273 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/MATHEMATIQUE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/15230406.2017.1379036 Date de publication en ligne : 02/10/2017 En ligne : https://doi.org/10.1080/15230406.2017.1379036 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90339 [article]

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Projection Wizard – An online map projection selection tool / Bojan Šavrič in Cartographic journal (the), Vol 53 n° 2 (May 2016)  

Public [article]  inCartographic journal (the) > Vol 53 n° 2 (May 2016) . - pp 177 - 185 Titre : Projection Wizard – An online map projection selection tool Type de document : Article/Communication Auteurs : Bojan Šavrič, Auteur ; Bernhard Jenny, Auteur ; Helen Jenny, Auteur Année de publication : 2016 Article en page(s) : pp 177 - 185 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] application web [Termes IGN] outil d'aide à la décision [Termes IGN] projection [Termes IGN] rédaction cartographique [Termes IGN] service web [Termes IGN] web mapping Résumé : (Auteur) The selection of map projections is difficult and confusing for many. This article introduces Projection Wizard, an online map projection selection tool available at projectionwizard.org that helps mapmakers select projections. The user selects the desired distortion property, and the area to be mapped on an interactive web map. Projection Wizard then proposes a projection, along with projection parameters (such as standard parallels). The tool also creates a preview map with the proposed projection, and provides the corresponding projection code in PROJ.4 format, if applicable. The automated selection process is based on John P. Snyder's selection guideline with a few adjustments. This article discusses the automated selection process, and the map projections suggested. Projection Wizard solves the problem of map projection selection for many applications and helps cartographers and GIS users choose appropriate map projections. Numéro de notice : A2016-513 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00087041.2015.1131938 En ligne : http://dx.doi.org/10.1080/00087041.2015.1131938 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81584 [article]

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User preferences for world map projections / Bojan Šavrič in Cartography and Geographic Information Science, Vol 42 n° 5 (November 2015)  

Public [article]  inCartography and Geographic Information Science > Vol 42 n° 5 (November 2015) . - pp 398 - 409 Titre : User preferences for world map projections Type de document : Article/Communication Auteurs : Bojan Šavrič, Auteur ; Bernhard Jenny, Auteur ; Denis White, Auteur ; Daniel R. Strebe, Auteur Année de publication : 2015 Article en page(s) : pp 398 - 409 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] échelle cartographique [Termes IGN] planisphère [Termes IGN] projection carte plate carrée [Termes IGN] projection de Robinson [Termes IGN] utilisateur Résumé : (Auteur) Many small-scale map projections exist, and they have different shapes and distortion characteristics. World map projections are mainly chosen based on their distortion properties and the personal preferences of cartographers. Very little is known about the map projection preferences of map-readers; only two studies have addressed this question so far. This article presents a user study among map-readers and trained cartographers that tests their preferences for world map projections. The paired comparison test of nine commonly used map projections reveals that the map-readers in our study prefer the Robinson and Plate Carrée projections, followed by the Winkel Tripel, Eckert IV, and Mollweide projections. The Mercator and Wagner VII projections come in sixth and seventh place, and the least preferred are two interrupted projections, the interrupted Mollweide and the interrupted Goode Homolosine. Separate binominal tests indicate that map-readers involved in our study seem to like projections with straight rather than curved parallels and meridians with elliptical rather than sinusoidal shapes. Our results indicate that map-readers prefer projections that represent poles as lines to projections that show poles as protruding edges, but there is no clear preference for pole lines in general. The trained cartographers involved in this study have similar preferences, but they prefer pole lines to represent the poles, and they select the Plate Carrée and Mercator projections less frequently than the other participants. Numéro de notice : A2015-557 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2015.1014425 En ligne : https://doi.org/10.1080/15230406.2015.1014425 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77595 [article]

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