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Assessing the planimetric accuracy of historical maps (sixteenth to nineteenth centuries): new methods and potential for coastal landscape reconstruction / Iason Jongepier in Cartographic journal (the), Vol 53 n° 2 (May 2016)  

Public [article]  inCartographic journal (the) > Vol 53 n° 2 (May 2016) . - pp 114 - 132 Titre : Assessing the planimetric accuracy of historical maps (sixteenth to nineteenth centuries): new methods and potential for coastal landscape reconstruction Type de document : Article/Communication Auteurs : Iason Jongepier, Auteur ; Tim Soens, Auteur ; Stijn Temmerman, Auteur ; Tine Missiaen, Auteur Année de publication : 2016 Article en page(s) : pp 114 - 132 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie ancienne [Termes IGN] analyse diachronique [Termes IGN] dix-neuvième siècle [Termes IGN] erreur de positionnement [Termes IGN] littoral [Termes IGN] précision planimétrique [Termes IGN] reconstruction d'image [Termes IGN] seizième siècle [Termes IGN] système d'information géographique [Termes IGN] utilisation du sol Résumé : (Auteur) Historical maps are vital tools for landscape reconstruction from the late medieval period onwards. However, the planimetric accuracy of local and regional maps before the nineteenth century is often considered problematic. This paper proposes a method for the evaluation of these maps, through integration in multiple computer programs such as ArcGIS, MapAnalyst and statistical software (SPSS). This method has been tested on a sample of historical maps depicting coastal landscape change in an area at the present-day Dutch-Belgian border (ranging from the local to the supra-regional level and from the sixteenth to the nineteenth centuries), and variations in planimetric accuracy over time have been interpreted. Results point to an exceptionally high accuracy of earlier medium- and large-scale maps – scale being the first determinant of planimetric accuracy – since no significant rise in accuracy over time was found. Notwithstanding this overall accuracy, many maps display pronounced local distortions. However, rather than disqualifying maps for landscape reconstruction, systematic analysis of these distortions can help to facilitate the interpretation of the historical maps and their use for landscape reconstruction. Finally, a method for integrating map accuracies in landscape reconstructions based on multiple maps is proposed and illustrated. Numéro de notice : A2016-510 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277414Y.0000000095 En ligne : http://dx.doi.org/10.1179/1743277414Y.0000000095 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81581 [article]

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030-2016021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Generalization of the Lambert–Lagrange projection / Sebastian Orihuela in Cartographic journal (the), Vol 53 n° 2 (May 2016)  

Public [article]  inCartographic journal (the) > Vol 53 n° 2 (May 2016) . - pp 158 - 165 Titre : Generalization of the Lambert–Lagrange projection Type de document : Article/Communication Auteurs : Sebastian Orihuela, Auteur Année de publication : 2016 Article en page(s) : pp 158 - 165 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] projection conforme [Termes IGN] projection conforme de Gauss [Termes IGN] projection conforme de Lagrange [Termes IGN] projection conforme de Lambert [Termes IGN] projection conique [Termes IGN] projection stéréographique Résumé : (Auteur) The Lagrange projection represents conformally the terrestrial globe within a circle. This is achieved by compressing the latitude and longitude and by applying the new coordinates into the equatorial stereographic projection. The same concept can be generalized to any conformal projection, although the application of this technique to other analytical functions is less known. In this work, the general Lambert–Lagrange projection formula is proposed and the application of the modified coordinates is discussed on projections: stereographic, conformal conic and Gauss–Schreiber. In general, the results are merely a curiosity, except for the case of Gauss–Schreiber, where the use of coordinates with altered scale can be applied in the optimization of conformal projections. Numéro de notice : A2016-511 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00087041.2015.1108063 En ligne : http://dx.doi.org/10.1080/00087041.2015.1108063 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81582 [article]

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Assessing the effectiveness and efficiency of map colour for colour impairments using an eye-tracking approach / Weihua Dong in Cartographic journal (the), Vol 53 n° 2 (May 2016)  

Public [article]  inCartographic journal (the) > Vol 53 n° 2 (May 2016) . - pp 166 - 176 Titre : Assessing the effectiveness and efficiency of map colour for colour impairments using an eye-tracking approach Type de document : Article/Communication Auteurs : Weihua Dong, Auteur ; S. Zhang, Auteur ; Hua Liao, Auteur Année de publication : 2016 Article en page(s) : pp 166 - 176 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rédaction cartographique [Termes IGN] Chine [Termes IGN] couleur (rédaction cartographique) [Termes IGN] daltonisme [Termes IGN] lecture de carte [Termes IGN] oculométrie [Termes IGN] teinte Résumé : (Auteur) Colour impairments influences access to geographical information which is usually represented by colour maps. Three dimensions of colour: Hue, Saturation and Value (HSV), are intuitive and most critical visual variables in map design. In this paper, we specifically focus on colour deficiency of red-green colour impairments. A controlled experiment was designed and conducted to explore how three colour dimensions (HSV) affect the abilities of people with normal colour vision or with red-green colour impairments to distinguish colours in maps. An eye-tracking approach was applied to quantify the accuracy and response time by capturing user eye movements to analyse the effectiveness and efficiency. In this study, we used one section of the administrative map of Hebei Province to test participant responses to area features. Differences of effectiveness and efficiency across normal colour vision and red-green colour impairments were compared. Multiple comparisons among Hue, Saturation and Value were analysed. Results show that for both normal colour vision and red-green colour impairments, Hue is the most differentiable than Saturation and Value. Saturation and Value are at the same level to be differentiated and more difficult to be distinguished. Guidelines of designing maps for both normal colour vision and red-green colour impairments were derived. The results of this study can be helpful to improve the map designs for colour deficiency. Numéro de notice : A2016-512 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/1743277413Y.0000000053 En ligne : http://dx.doi.org/10.1179/1743277413Y.0000000053 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81583 [article]

Exemplaires(1)

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030-2016021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

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]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
030-2016021	RAB	Revue	Centre de documentation	En réserve L003	Disponible