Results 41 to 50 of about 3,471,337 (333)
RESEARCH ON EXTENSION OF SPARQL ONTOLOGY QUERY LANGUAGE CONSIDERING THE COMPUTATION OF INDOOR SPATIAL RELATIONS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015 A method suitable for indoor complex semantic query considering the computation of indoor spatial relations is provided According to the characteristics of indoor space. This paper designs ontology model describing the space related information of humans,
C. Li, X. Zhu, W. Guo, Y. Liu, H. Huang
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Efficient Privacy-Preserving Spatial Data Query in Cloud Computing
IEEE Transactions on Knowledge and Data EngineeringWith the rapid development of geographic location technology and the explosive growth of data, a large amount of spatial data is outsourced to the cloud server for reducing the local high storage and computing burdens, but at the same time causes ...
Yinbin Miao +5 more
semanticscholar +1 more source
Sensors, 2015 A content-matched (CM) rangemonitoring query overmoving objects continually retrieves the moving objects (i) whose non-spatial attribute values are matched to given non-spatial query values; and (ii) that are currently located within a given spatial ...
HaRim Jung +3 more
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Spatial Concept Query Based on Lattice-Tree
ISPRS International Journal of Geo-Information, 2022 As a basic method of spatial data operation, spatial keyword query can provide meaningful information to meet user demands by searching spatial textual datasets. How to accurately understand users’ intentions and efficiently retrieve results from spatial
Aopeng Xu +4 more
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Onion Curve: A Space Filling Curve with Near-Optimal Clustering [PDF]
, 2018 Space filling curves (SFCs) are widely used in the design of indexes for spatial and temporal data. Clustering is a key metric for an SFC, that measures how well the curve preserves locality in moving from higher dimensions to a single dimension.
Nguyen, Cuong +3 more
core +4 more sources
International Journal of Distributed Sensor Networks, 2015 Database applications in wireless sensor networks very often demand data collection from sensor nodes of specific target regions. Design and development of spatial query expressions and energy-efficient query processing strategy are important issues for ...
Chong sok Lim +3 more
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IB-CBB: an improved spatial index considering intersection based on clipped bounding boxes
Annals of GISEfficiently querying multiple spatial datasets is a challenging task in geoscience. The majority of spatial processing techniques use minimum bounding box (MBB) to approximate neighbouring spatial objects and and place them adjacent in the spatial index.
Wei Xiong +3 more
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A Density-Based Approach to the Retrieval of Top-K Spatial Textual Clusters
, 2016 Keyword-based web queries with local intent retrieve web content that is relevant to supplied keywords and that represent points of interest that are near the query location. Two broad categories of such queries exist.
Jensen, Christian S., Wu, Dingming
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Preventing Location-Based Identity Inference in Anonymous Spatial Queries [PDF]
, 2007 The increasing trend of embedding positioning capabilities (for example, GPS) in mobile devices facilitates the widespread use of Location-Based Services. For such applications to succeed, privacy and confidentiality are essential.
GHINITA, Gabriel +3 more
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An Air Index for Spatial Query Processing in Road Networks
IEEE Transactions on Knowledge and Data Engineering, 2015 Spatial queries such as range query and kNN query in road networks have received a growing number of attention in real life. Considering the large population of the users and the high overhead of network distance computation, it is extremely important to
Weiwei Sun +4 more
semanticscholar +1 more source