Results 231 to 240 of about 117,366 (264)
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Watermarking Spatial Trajectory Database
2005Protection of digital assets from piracy has received increasing interests where sensitive, valuable data need to be released. This paper addresses the problem of watermarking spatial trajectory database. The formal definition of the problem is given and the potential attacks are analyzed.
Xiaoming Jin +3 more
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Spatial database access methods
ACM SIGMOD Record, 1991In the discussion of research issues in spatial databases (SIGMOD Record vol. 19, no. 4, Dec 1990) we stated the need for a robust framework for analytical comparison of a broad range of spatial access methods. The utility of such a comparison, even of very closely related access methods, was shown in [FALO87]. A necessary precondition for a meaningful
Betty Salzberg, David B. Lomet
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Concurrency control of spatial join on spatial database
Fourth Annual ACIS International Conference on Computer and Information Science (ICIS'05), 2005For the process of spatial data, in addition to the basic operations of insertion, deletion, update, and search, there are some special operations such as nearest neighbor search, spatial join, etc. Hung et al. proposed an algorithm based on an R-tree to perform the operation of spatial join for spatial objects. However, this algorithm is only suitable
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Spatial Browsing for Video Databases
1999Time-series description data concerning a camera are expected to be automatically generated by various sensors in the near future, such as a camera's time-series positions, directions and zoom ratios so as to provide a rich environment for retrieving and browsing video data spatially.
Masatoshi Arikawa, Tetsu Kamiyama
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Topological Relations in Spatial Databases
2002Various models for the representation of topological relations have been developed. The aim of this chapter is to propose a comprehensive view of state-of-the-art models for topological relations in spatial databases. A prominent role is assumed by the CBM (calculus-based method), which offers a small set of topological relations with high ...
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Vague Relations in Spatial Databases
2010While qualitative relations (e.g. RCC8 relations) can readily be derived from spatial databases, a more difficult matter is the representation of vague spatial relations such as 'near-to', 'next-to', 'between', etc. After surveying earlier approaches, this paper proposes a method that is tractable, learnable and directly suitable for use in natural ...
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On the Estimation of Spatial Database Performances.
2014We discuss the results of experiments on spatial databases, aiming to empirically derive parameters for estimating disk occupancy and performances since from the conceptual stages of the design process. This opens the way to the definition of an estimation methodology, which should let a designer evaluate the quality of alternative design choices based
POLESE, Giuseppe +1 more
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Research issues in spatial databases [PDF]
ACM SIGMOD Record, 1990 Oliver Günther 0001 +1 more
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