Results 221 to 230 of about 271,473 (265)

A spatial database as a component of integrated database system

Proceedings 1999 International Symposium on Database Applications in Non-Traditional Environments (DANTE'99) (Cat. No.PR00496), 2003
Huge amounts of spatial data have been accumulated by government agencies and other organizations for various kinds of applications, such as land information management, asset and facility management, resource management, and environment management. These data are typically collected, stored and used by different custodians for very specific purposes ...
Maria E. Orlowska, Xiaofang Zhou 0001
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Spatial Databases

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, Kang, James, Shekhar, Shashi   +2 more
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Keyword Search on Spatial Databases

2008 IEEE 24th International Conference on Data Engineering, 2008
Many applications require finding objects closest to a specified location that contains a set of keywords. For example, online yellow pages allow users to specify an address and a set of keywords. In return, the user obtains a list of businesses whose description contains these keywords, ordered by their distance from the specified address.
Ian De Felipe, Vagelis Hristidis, Naphtali Rishe   +2 more
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Navigation of the Internet with spatial databases

Proceedings 1999 International Symposium on Database Applications in Non-Traditional Environments (DANTE'99) (Cat. No.PR00496), 2003
Most Internet search engines are keyword based. They are not efficient for the queries where geographical location is important, such as finding hotels close to a place of interest. A natural interface for spatial searching is a map, which can be used not only to display locations of search results but also to assist forming search conditions.
Joseph D. Yates, Xiaofang Zhou 0001
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Communicating uncertainty in spatial databases

Transactions in GIS, 1996
As applications of spatial databases become more sophisticated and diverse, an issue of growing concern is the inability to communicate to users the uncertainty of products derived from their systems. This is important not only because users should be able to compare the quality of database outputs against the quality requirements of their tasks (in ...
Gary J. Hunter, Michael F. Goodchild
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Spatial Indexing for Video Databases

Journal of Visual Communication and Image Representation, 1996
Abstract Spatial reasoning techniques based on 2D string systems have been successfully applied to indexing pictorial databases. We demonstrate how similar techniques may be extended to represent video sequences, and how this representation may be compressed. Query schemes for both single frame queries, and full subsequence queries are presented. The
Kim Shearer, Svetha Venkatesh, Dorota H. Kieronska   +2 more
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Watermarking Spatial Trajectory Database

2005
Protection 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, Zhihao Zhang, Jianmin Wang 0001, Deyi Li   +3 more
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Spatial database access methods

ACM SIGMOD Record, 1991
In 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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Spatial Browsing for Video Databases

1999
Time-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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Concurrency control of spatial join on spatial database

Fourth Annual ACIS International Conference on Computer and Information Science (ICIS'05), 2005
For 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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