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handle: 10261/27849
[FR] Les arbres quaternaires sont des structures tres efficientes pour gérer de I'information géographique numerisée. Cela est vrai parce qu'ils permettent la représentation des objects a deux dimensions, de facon qu'une grande compactage a lieu si les obiects ne sont pas trop compliqués. Dans cet artick nous présentons quelques applications des arbres quaternaires aux SIGs. On a remarqué le probleme de I'intégration des mod&les topographiques dans un SIG qui a la structure d'un arbre quaternaire. Nous avons approché spécifiquement les arbres quater. naires raster linéaires, et spécialement ces du type CS2D.
[EN]Three hierarchical levels are used for the coordinates. The highest divides the world into UTM zones and subzones. For the 30 meters (30*256), which are numbered according to the Morton sequence. Finally, within each patch, pixels are numbered in the Morton sequence. For each patch, any number of point, line, coverage, and/or surface files might exist within the GIS. The upper level of the GIS would consist of a data base management system (DBSM), perhaps relational, which would contain a directory of patches, data types, data sets actually available, and summary statics for each.
[ES] Los árboles cuaternarios son muy eficientes en muchas aplicaciones de SIGs. Esto es asi, fundamentalmente, porque representan datos espaciales en dos dimensiones de manera que se aprovecha la coherencia espacial del fenómeno descrito. Este articulo ha indagado la aplicación de árboles cuaternarios a datos geográficos genéricos. El énfasis se ha colocado en la integración de datos topográficos en un SIG con estructura de árbol cuaternario, La atención se ha centrado en los árboles cuaternarios raster lineales y en su representación mediante archivos CS2D, especialmente
Peer reviewed
UTM, Sistemas de información geográfica, Sistemas de Información Geográfica, Digital Elevation Models, Geographic Information Systems (GIS), Systémes I'Information Géographique, Data structures for GIS, Geographic information systems, Jerarquía, Proyecciones cartagráficas, Arboles cuaternarios, Digital elevation models, Modeles topographiques, Modelos Topográficos Dígitales, Quadtrees, Arbres quaternaires, Structures de données pour Systémes d'Infonnation Géographqiue
UTM, Sistemas de información geográfica, Sistemas de Información Geográfica, Digital Elevation Models, Geographic Information Systems (GIS), Systémes I'Information Géographique, Data structures for GIS, Geographic information systems, Jerarquía, Proyecciones cartagráficas, Arboles cuaternarios, Digital elevation models, Modeles topographiques, Modelos Topográficos Dígitales, Quadtrees, Arbres quaternaires, Structures de données pour Systémes d'Infonnation Géographqiue
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