Results 11 to 20 of about 19,086 (267)
Top-K Collective Spatial Keyword Queries
IEEE Access, 2019 With the advent of a large number of spatial-textual data, collective spatial keyword queries have been widely studied in recent years. However, the collective spatial keyword query studied so far usually looks for only a set of objects. In addition, the
Danni Su +4 more
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SparkNN: A Distributed In-Memory Data Partitioning for KNN Queries on Big Spatial Data
Data Science Journal, 2020 The increase in GPS-enabled devices and proliferation of location-based applications have resulted in an abundance of geotagged (spatial) data. As a consequence, numerous applications have emerged that utilize the spatial data to provide different types ...
Zaher Al Aghbari +2 more
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Search geometric ranges efficiently as keywords over encrypted spatial data
High-Confidence Computing, 2022 With the increasing popularity of location-based services (LBS), data outsourcing toward clouds is an emerging paradigm for ease of data management by LBS providers. Geometric range queries are one of the fundamental search functions in LBS, which are to
Ruoyang Guo +4 more
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Group Processing of Multiple k-Farthest Neighbor Queries in Road Networks
IEEE Access, 2020 Advances in mobile technologies and map-based applications enables users to utilize sophisticated spatial queries, including k-nearest neighbor and shortest path queries.
Hyung-Ju Cho, Muhammad Attique
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GeoFlink: An Efficient and Scalable Spatial Data Stream Management System
IEEE Access, 2022 This era is witnessing an exponential growth in spatial data due to the increase in GPS-enabled devices. Spatial data can be of extreme use to commercial businesses, governments and NGOs if processed timely.
Salman Ahmed Shaikh +4 more
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Top-k Spatial Preference Queries in Directed Road Networks
ISPRS International Journal of Geo-Information, 2016 Top-k spatial preference queries rank objects based on the score of feature objects in their spatial neighborhood. Top-k preference queries are crucial for a wide range of location based services such as hotel browsing and apartment searching.
Muhammad Attique +3 more
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Enhancing Quad Tree for Spatial Index Using Space Filling Curves [PDF]
Engineering and Technology Journal, 2020 Spatial indexes, such as those based on the Quad Tree, are important in spatial databases for the effective implementation of queries with spatial constraints, especially when queries involve spatial links.
Ali Hussain, Rehab Hassan
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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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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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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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