Results 251 to 260 of about 5,565,979 (320)
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Ontop-spatial: Ontop of geospatial databases
Journal of Web Semantics, 2019In this paper, we propose an OBDA approach for accessing geospatial data stored in relational databases using the R2RML mappings and OGC standard GeoSPARQL.
K. Bereta +2 more
semanticscholar +1 more source
Research of spatial database based on spatial database engine
SPIE Proceedings, 2007With increasing demands of GIS applications system in a complex, integrated, and other areas, the spatial data are required rapid growth for the systems, and users are more and more on the demand spatial data. The method which traditional documents express spatial data is obviously unable to meet these needs.
Mengquan Wu +3 more
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2007
Spatial database research has continued to advance greatly since three decades ago, addressing the growing data management and analysis needs of spatial applications. This research has produced a taxonomy of models for space, conceptual models, spatial query languages and query processing, spatial file organization and indexes, and spatial data mining.
Gandhi, Vijay +2 more
openaire +1 more source
Spatial database research has continued to advance greatly since three decades ago, addressing the growing data management and analysis needs of spatial applications. This research has produced a taxonomy of models for space, conceptual models, spatial query languages and query processing, spatial file organization and indexes, and spatial data mining.
Gandhi, Vijay +2 more
openaire +1 more source
Genericity in Spatial Databases
2000In 1980, Chandra and Harel investigated, in the context of the relational database model, which queries are “reasonable”. They characterized this class of queries by means of the concept of genericity, which has since taken a central position in the theory of computable queries.
Kuijpers, Bart, van Gucht, D.
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2009
A Spatial Database is a database that offers spatial data types, a query language with spatial predicates, spatial indexing techniques, and efficient processing of spatial queries. All these fields have attracted the focus of researchers over the past 25 years.
Betsy George, Shashi Shekhar
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A Spatial Database is a database that offers spatial data types, a query language with spatial predicates, spatial indexing techniques, and efficient processing of spatial queries. All these fields have attracted the focus of researchers over the past 25 years.
Betsy George, Shashi Shekhar
openaire +2 more sources
Journal of Geophysical Research: Planets, 2019
This paper presents a new, global database of lunar impact craters, estimated to be a complete census of all craters with diameters larger than 1–2 km. The database contains over 2 million craters, making it larger in number than any previously published
S. Robbins
semanticscholar +1 more source
This paper presents a new, global database of lunar impact craters, estimated to be a complete census of all craters with diameters larger than 1–2 km. The database contains over 2 million craters, making it larger in number than any previously published
S. Robbins
semanticscholar +1 more source
Lost in quantization: Improving particular object retrieval in large scale image databases
2008 IEEE Conference on Computer Vision and Pattern Recognition, 2008The state of the art in visual object retrieval from large databases is achieved by systems that are inspired by text retrieval. A key component of these approaches is that local regions of images are characterized using high-dimensional descriptors ...
James Philbin +4 more
semanticscholar +1 more source
Decomposing spatial databases and applications
Proceedings 11th International Workshop on Database and Expert Systems Applications, 2002Topological invariants of spatial databases can act as a basic structure to tackle relevant problems in the field. It turns out that the main concern in these problems is the manipulation of topological invariants by means of efficient algorithms. To this aim, we introduce the notion of boundary decomposition of a topological invariant and give a ...
CICERONE, SERAFINO +2 more
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Clustering in Dynamic Spatial Databases
Journal of Intelligent Information Systems, 2005zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhang, J., Hsu, W., Lee, M.L.
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dedale, a spatial constraint database
1998This paper presents a first prototype of a constraint database for spatial information, dedale. Implemented on top of the O2 DBMS, data is stored in an object-oriented framework, with spatial data represented using linear constraints over a dense domain. The query language is the standard OQL, with special functions for constraint solving and geometric
Grumbach, Stéphane +3 more
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