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Proceedings 1996 IEEE Symposium on Visual Languages, 2002
Today's methods for interacting with geographic information systems (GISs) and geographic databases are primarily aspatial, as they require users to deal with geographic data primarily through alphanumeric command languages. Spatial querying by typing a command in some spatial query language or by selecting the same syntax from pull-down menus is a ...
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Today's methods for interacting with geographic information systems (GISs) and geographic databases are primarily aspatial, as they require users to deal with geographic data primarily through alphanumeric command languages. Spatial querying by typing a command in some spatial query language or by selecting the same syntax from pull-down menus is a ...
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Spatial Queries Evaluation with MapReduce
2009 Eighth International Conference on Grid and Cooperative Computing, 2009Spatial queries include spatial selection query, spatial join query, nearest neighbor query, etc. Most of spatial queries are computing intensive and individual query evaluation may take minutes or even hours. Parallelization seems a good solution for such problems. However, parallel programs must communicate efficiently, balance work across all nodes,
Shubin Zhang +4 more
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Spatial inverse query processing
GeoInformatica, 2012Traditional spatial queries return, for a given query object q, all database objects that satisfy a given predicate, such as epsilon range and k-nearest neighbors. This paper defines and studies inverse spatial queries, which, given a subset of database objects Q and a query predicate, return all objects which, if used as query objects with the ...
Mamoulis, N +6 more
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2012
Spatial-textual content is becoming increasingly prevalent: — Location-based services from major commercial search engines. For example, in Google Maps many (geo-referenced) points of interest--e.g., clinics, stores, tourist attractions, hotels, entertainment services, public transport, and public services--are being associated with descriptive ...
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Spatial-textual content is becoming increasingly prevalent: — Location-based services from major commercial search engines. For example, in Google Maps many (geo-referenced) points of interest--e.g., clinics, stores, tourist attractions, hotels, entertainment services, public transport, and public services--are being associated with descriptive ...
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The Farthest Spatial Skyline Queries
Information Systems, 2013Pareto-optimal objects are favored as each of such objects has at least one competitive edge against all other objects, or ''not dominated''. Recently, in the database literature, skyline queries have gained attention as an effective way to identify such pareto-optimal objects. In particular, this paper studies the pareto-optimal objects in perspective
Gae-won You +3 more
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Flexible Location-Based Spatial Queries
2007A model for representing and evaluating flexible Location-Based Spatial Queries (LBSQ) is proposed. In a LBSQ the selection condition is generally a constraint on the distance of the objects in the database (instances) from the user location. Such queries are becoming more and more useful in location-based services such as those provided by cell-phones,
Gloria Bordogna +3 more
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A Spatial Logic for Querying Graphs
2002We study a spatial logic for reasoning about labelled directed graphs, and the application of this logic to provide a query language for analysing and manipulating such graphs. We give a graph description using constructs from process algebra. We introduce a spatial logic in order to reason locally about disjoint subgraphs.
CARDELLI L., GHELLI, GIORGIO, GARDNER P.
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Proceedings of the 26th International Database Engineered Applications Symposium, 2022
Paulo Sérgio Pintor +2 more
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Paulo Sérgio Pintor +2 more
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Broadcast-Based Spatial Queries
Journal of Computer Science and Technology, 2005Indexing techniques have been developed for wireless data broadcast environments, in order to conserve the scarce power resources of the mobile clients. However, the use of interleaved index segments in a broadcast cycle increases the average access latency for the clients.
Kwang-Jin Park +2 more
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Spatial queries and data models
1993We present a unified framework for classifying and answering spatial queries relevant to a Geographic Information System. We classify spatial queries into topological, set-theoretic, and metric queries, on the basis of the kind of relationships between the query object and entities in the search space involved. For answering such queries, we propose an
Leila De Floriani +2 more
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