Results 41 to 50 of about 24,126 (306)
Multi-Step Processing of Spatial Joins [PDF]
, 1994 Spatial joins are one of the most important operations for combining spatial objects of several relations. In this paper, spatial join processing is studied in detail for extended spatial objects in twodimensional data space.
Kriegel, Hans-Peter +7 more
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Access structures for fuzzy spatial queries [PDF]
, 2002 Spatial data are complex and have spatial components and uncertain properties. It is important to develop effective spatial and aspatial indexing techniques to facilitate spatial and/or aspatial querying for databases that deal with spatial data. In this
Yazıcı, Adnan, Yazici, A, Sozer, A
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Distance-Constraint k-Nearest Neighbor Searching in Mobile Sensor Networks
Sensors, 2015 The κ -Nearest Neighbors ( κNN) query is an important spatial query in mobile sensor networks. In this work we extend κNN to include a distance constraint, calling it a l-distant κ-nearest-neighbors ( l ...
Yongkoo Han +4 more
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Sensors, 2018 Wireless sensor networks can be regarded as sensor database systems, which permit users to query sensor data of interest. Among various spatial database queries, we focus the area-wise aggregate queries in the region where the sensor values are above a ...
Yaxi Liu +3 more
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OPTIMIZATION OF LOCATION BASED QUERIES USING SPATIAL INDEXING [PDF]
ICTACT Journal on Soft Computing, 2014 The recent development in the technology leads to the introduction of various mobile terminals and there is a demand that the client requires effective location based services.
S. Geetha, S. Anu Velavan
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Research on Time-Aware Group Query Method with Exclusion Keywords
ISPRS International Journal of Geo-Information, 2023 Aiming at the problem that the existing spatial keyword group query problem did not consider the query requirements with exclusion keywords and time attributes, a time-aware group query problem with exclusion keywords (TEGSKQ) is proposed for the first ...
Liping Zhang, Jing Li, Song Li
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Preventing Location-Based Identity Inference in Anonymous Spatial Queries [PDF]
, 2007 10.1109/TKDE.2007.190662IEEE Transactions on Knowledge and Data Engineering19121719 ...
Kalnis, P. +7 more
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Optimal Matching between Spatial Datasets under Capacity Constraints [PDF]
, 2010 Consider a set of customers (e.g., WiFi receivers) and a set of service providers (e.g., wireless access points), where each provider has a capacity and the quality of service offered to its customers is anti-proportional to their distance.
LEONG, Hou U +8 more
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Efficient processing of top-k frequent spatial keyword queries
Scientific Reports, 2022 The rapid popularization of high-speed mobile communication technology and the continuous development of mobile network devices have given spatial textual big data (STBD) new dimensions due to their ability to record geographical objects from multiple ...
Tao Xu +5 more
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Spatial Analysis on Networks: Towards identifying similarity of routes
European Journal of Geography, 2021 Finding an optimal path in a road network is a method of planning and decision-making that is mainly related to transportations and emergency response.
Panagiotis Agourogiannis +2 more
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