What is the Shape of Geographical Time-Space? A three-dimensional Model made of Curves and Cones
| Autor: | Alain l'Hostis, Farouk Abdou |
|---|---|
| Přispěvatelé: | Laboratoire Ville, Mobilité, Transport (LVMT), École des Ponts ParisTech (ENPC)-Université Gustave Eiffel, Ministère de la Défense |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Surface (mathematics)
Geodesic Computer science Geography Planning and Development 0211 other engineering and technologies 0507 social and economic geography TRIDIMENSIONNEL Geometry 02 engineering and technology GEOGRAPHIE Legibility Inversion (discrete mathematics) Computer graphics CHINE 11. Sustainability Earth and Planetary Sciences (miscellaneous) Computers in Earth Sciences Representation (mathematics) CARTOGRAPHIE Geography (General) Series (mathematics) 05 social sciences GEOGRAPHICAL TIME-SPACE GEODESIE 021107 urban & regional planning CARTOGRAPHY REPRESENTATION SPATIALE [SHS.GEO]Humanities and Social Sciences/Geography TRANSPORT REPRESENTATION GRAPHIQUE INFOGRAPHIE Graph (abstract data type) G1-922 050703 geography |
| Zdroj: | ISPRS International Journal of Geo-Information ISPRS International Journal of Geo-Information, MDPI, 2021, 10 (5), pp1-17. ⟨10.3390/ijgi10050340⟩ ISPRS International Journal of Geo-Information, Vol 10, Iss 340, p 340 (2021) Volume 10 Issue 5 |
| ISSN: | 2220-9964 |
| DOI: | 10.3390/ijgi10050340⟩ |
| Popis: | Geographical time-spaces exhibit a series of properties, including space inversion, that turns any representation effort into a complex task. In order to improve the legibility of the representation and leveraging the advances of three-dimensional computer graphics, the aim of the study is to propose a new method extending time-space relief cartography introduced by Mathis and L’Hostis. The novelty of the model resides in the use of cones to describing the terrestrial surface instead of graph faces, and in the use of curves instead of broken segments for edges. We implement the model on the Chinese space. The Chinese geographical time-space of reference year 2006 is produced by the combination and the confrontation of the fast air transport system and of the 7.5-times slower road transport system. Slower, short range flights are represented as curved lines above the earth surface with longer length than the geodesic, in order to account for a slower speed. The very steep slope of cones expresses the relative difficulty of crossing terrestrial time-space, as well as the comparably extreme efficiency of long-range flights for moving between cities. Finally, the whole image proposes a coherent representation of the geographical time-space where fast city-to-city transport is combined with slow terrestrial systems that allow one to reach any location. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|