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From historical map to online 3D recreation: the 1861 cadastral map of Horta (Barcelona) / Alexandre Nobajas in Cartography and Geographic Information Science, Vol 42 n° 3 (July 2015)  

Public [article]  inCartography and Geographic Information Science > Vol 42 n° 3 (July 2015) . - pp 211 - 223 Titre : From historical map to online 3D recreation: the 1861 cadastral map of Horta (Barcelona) Type de document : Article/Communication Auteurs : Alexandre Nobajas, Auteur ; Francesc Nadal, Auteur Année de publication : 2015 Article en page(s) : pp 211 - 223 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] base de données répartie [Termes IGN] cadastre étranger [Termes IGN] carte ancienne [Termes IGN] Catalogne (Espagne) [Termes IGN] dix-neuvième siècle [Termes IGN] plan cadastral [Termes IGN] visualisation 3D [Termes IGN] visualisation cartographique Résumé : (auteur) The recent study and classification of over 200 cadastral maps created in the nineteenth century in Catalonia have provided a valuable source of information about the agricultural landscape country’s past, but by linking them with data recorded in tax books known as amillaramientos, it is possible to gain a better knowledge of the past. By applying this method to the 1861 cadastral map of Horta and its corresponding amillaramiento, a planimetric map showing the land use distribution in the town was created. The resulting land use map was subsequently overlaid on top of a digital elevation model to create 3D visualizations which show the altitudinal distribution of crops and other features. Finally, the article explores a way of distributing the results online, making them accessible to the public and increasing the research impact of future findings. Therefore, the method described in this article allows the systematic recreation and distribution of past landscapes by using Catalan cadastral maps of the nineteenth century, something which can help enrich the scientific knowledge of many disciplines. Numéro de notice : A2015-240 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.998285 En ligne : https://doi.org/10.1080/15230406.2014.998285 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76236 [article]

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032-2015031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

The “M” in digital elevation models / XiaoHang Liu in Cartography and Geographic Information Science, Vol 42 n° 3 (July 2015)  

Public [article]  inCartography and Geographic Information Science > Vol 42 n° 3 (July 2015) . - pp 235 - 243 Titre : The “M” in digital elevation models Type de document : Article/Communication Auteurs : XiaoHang Liu, Auteur ; Hai Hu, Auteur ; Peng Hu, Auteur Année de publication : 2015 Article en page(s) : pp 235 - 243 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] données lidar [Termes IGN] généralisation sémantique [Termes IGN] isomorphisme [Termes IGN] modèle numérique de surface [Termes IGN] modélisation 3D Résumé : (auteur) The “M” in digital elevation models (DEM) stands for model, which literally means “a schematic description of a system, theory, or phenomenon that accounts for its known or inferred properties and may be used for further study of its characteristics.” A DEM fulfills the requirement of “a schematic description” of terrain. However, how to make it account for the “known or inferred properties” warrants further scrutiny. This article outlines three properties of terrain and examines their four implications to DEM generation. The three properties are as follows: (1) each terrain point has a single, fixed elevation; (2) terrain points have an order and sequence that is determined by their elevations; and (3) terrain has skeletons. The four implications to DEM generation methods are as follows: (1) a method must be a bijection; (2) a method must be an isomorphism in order to preserve elevation sequence; (3) a method must guarantee that the vertical error at any point, not just checkpoints, is acceptable in order to assure the vertical accuracy of a DEM; and (4) a method must involve generalization if terrain skeletons are to be preserved. These implications are discussed in the context of light detection and ranging-derived DEMs. Generalization is highlighted as the top priority for future research. Numéro de notice : A2015-241 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/15230406.2014.993711 En ligne : https://doi.org/10.1080/15230406.2014.993711 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76239 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2015031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

On strategies and automation in upgrading 2D to 3D landscape representations / Nikolas Prechtel in Cartography and Geographic Information Science, Vol 42 n° 3 (July 2015)  

Public [article]  inCartography and Geographic Information Science > Vol 42 n° 3 (July 2015) . - pp 244 - 258 Titre : On strategies and automation in upgrading 2D to 3D landscape representations Type de document : Article/Communication Auteurs : Nikolas Prechtel, Auteur Année de publication : 2015 Article en page(s) : pp 244 - 258 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] cohérence des données [Termes IGN] modèle 3D du site [Termes IGN] rendu réaliste [Termes IGN] Saxe (Allemagne) [Termes IGN] système d'information géographique [Termes IGN] Triangulated Irregular Network [Termes IGN] université Résumé : (auteur) 3D scenes within all media indicate a societal preference shift toward 3D presentations. In spite of wide data availability and successful standardization efforts in 3D modeling, it is not a standard practice to offer large-scale topographic references to the end user in the form of 3D models. This motivates to propose automated strategies for the generation of closed 3D representations of a complete urban landscape, which at the same time account for capabilities of consumer-class devices. The campus of Dresden University of Technology served as a test case. The final appearance of the 3D model will be steered directly by the original geographic information system (GIS) data source. Such a “schematic model” displays source classes and attributes by nonphotorealistic rendering. A tested generic workflow can be presented, which programmatically integrates attributed 2D GIS entities and digital elevation model data, checks for compliancy with consistency rules and generates a slim geometric model. Only detailed GIS references can be considered to allow close-range visualization as needed in virtual walks. In delegating the geometric processing to automated workflows, playing room is gained for as well innovative as expressive texturing and, thus, design of the final 3D model. Numéro de notice : A2015-242 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/15230406.2014.987696 En ligne : https://doi.org/10.1080/15230406.2014.987696 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76240 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2015031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A perception-based color recommendation algorithm for hierarchical regions / Shipeng Sun in Cartography and Geographic Information Science, Vol 42 n° 3 (July 2015)  

Public [article]  inCartography and Geographic Information Science > Vol 42 n° 3 (July 2015) . - pp 259 - 270 Titre : A perception-based color recommendation algorithm for hierarchical regions Type de document : Article/Communication Auteurs : Shipeng Sun, Auteur Année de publication : 2015 Article en page(s) : pp 259 - 270 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique [Termes IGN] carte thématique [Termes IGN] contraste de couleurs [Termes IGN] couleur (rédaction cartographique) [Termes IGN] lisibilité perceptive [Termes IGN] visualisation cartographique Résumé : (auteur) The visualization of hierarchical and nested spatial regions remains a challenge to cartographers. Despite progress in computer algorithms for visualizing general hierarchical data, mapping spatial hierarchical regions, especially with static, noninteractive means, still requires considerable manual efforts. This paper proposes a two-step algorithm that can automatically recommend perception-based colors and help reveal the hierarchical structure embedded in nested regions. It first systematically sorts regions according to their contiguity and containment relations at multiple hierarchical levels. Then, perception-based colors are generated using the order of regions with the goal of maximizing differentiability between top-level regions while retaining the perceived uniformity of the bottom-level regions. With the coloring scheme recommended by this algorithm, the metric color differences among regions mathematically reflect their hierarchical positions and spatial relations. The resultant colors, therefore, can potentially help map-readers perceive the spatially constrained hierarchy structure built in nested regions. Numéro de notice : A2015-243 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2014.991424 En ligne : https://doi.org/10.1080/15230406.2014.991424 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76241 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-2015031	RAB	Revue	Centre de documentation	En réserve L003	Disponible