Results 11 to 20 of about 38,232 (264)
A Query Understanding Framework for Earth Data Discovery
Applied Sciences, 2020 One longstanding complication with Earth data discovery involves understanding a user’s search intent from the input query. Most of the geospatial data portals use keyword-based match to search data.
Yun Li +4 more
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A NOVEL APPROACH OF INDEXING AND RETRIEVING SPATIAL POLYGONS FOR EFFICIENT SPATIAL REGION QUERIES [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 Spatial region queries are more and more widely used in web-based applications. Mechanisms to provide efficient query processing over geospatial data are essential. However, due to the massive geospatial data volume, heavy geometric computation, and high
J. H. Zhao +7 more
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Bidirectional k-nearest neighbor spatial crowdsourcing allocation protocol based on edge computing [PDF]
PeerJ Computer Science, 2023 Spatial crowdsourcing refers to the allocation of crowdsourcing workers to each task based on location information. K-nearest neighbor technology has been widely applied in crowdsourcing applications for crowdsourcing allocation. However, there are still
Jing Zhang +3 more
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GeoSpark SQL: An Effective Framework Enabling Spatial Queries on Spark
ISPRS International Journal of Geo-Information, 2017 In the era of big data, Internet-based geospatial information services such as various LBS apps are deployed everywhere, followed by an increasing number of queries against the massive spatial data.
Zhou Huang +3 more
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Topological queries in spatial databases
Proceedings of the fifteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems, 1996 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Christos H. Papadimitriou +2 more
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A VOMR-TREE BASED PARALLEL RANGE QUERY METHOD ON DISTRIBUTED SPATIAL DATABASE [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 Spatial index impacts upon the efficiency of spatial query seriously in distributed spatial database. In this paper, we introduce a parallel spatial range query algorithm, based on VoMR-tree index, which incorporates Voronoi diagrams into MR-tree ...
Z. Fu, Z. Fu, S. Liu
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A Spatial Index Based on Clipping Bounding Box of Space Partitioning Tree [PDF]
Zhengzhou Daxue xuebao. Gongxue ban, 2022 In spatial databases, spatio-temporal indexes based on R tree use minimum bounding box(MBB)to approximate spatio-temporal data to improve query efficiency, and the efficiency of indexing can be further improved by by clipping the bounding box.To ...
XIONG Wei +4 more
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Sensors, 2018 With the rapid development of mobile devices and sensors, effective searching methods for big spatial data have recently received a significant amount of attention.
Bumjoon Jo, Sungwon Jung
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Resource Capacitated Collective Travel Planning in Spatial Databases
IEEE Access, 2020 The widespread use of GPS smart devices has allowed users to collect location information in real-time, leading to the emergence of ride-sharing services based on users' locations. Ride-sharing services have become effective services that reduce the cost
Junkyu Lee, Seog Park
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A Hierarchical Spatial Network Index for Arbitrarily Distributed Spatial Objects
ISPRS International Journal of Geo-Information, 2021 The range query is one of the most important query types in spatial data processing. Geographic information systems use it to find spatial objects within a user-specified range, and it supports data mining tasks, such as density-based clustering. In many
Xiangqiang Min +3 more
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