Results 21 to 30 of about 117,366 (264)
Spatial variation of feature density in multiscale topographic data
Geography, Environment, Sustainability, 2023 Digital topographic maps are created in a series of scales from large to small, and the underlying spatial data is commonly organized as a multiscale database consisting of several levels of detail (LoDs). Spatial density of features (or spatial objects)
T. E. Samsonov +3 more
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Finding Visible kNN Objects in the Presence of Obstacles within the User’s View Field
ISPRS International Journal of Geo-Information, 2019 In many spatial applications, users are only interested in data objects that are visible to them. Hence, finding visible data objects is an important operation in these real-world spatial applications.
I-Fang Su +3 more
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Linking Off-Road Points to Routing Networks
Algorithms, 2022 Although graph theory has already been introduced in spatial reasoning, current spatial database systems do not provide out-of-the-box routing on geometric points that are not matched on the graph.
Dominik Köppl
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Group Tracking for Video Monitoring Systems: A Spatio-Temporal Query Processing Approach
IEEE Access, 2023 Recently, many video monitoring systems utilize deep learning technologies to recognize locations and trajectories of people in video data. In video monitoring systems, a fast discovery of human groups is an important task for several applications, for ...
Hyunsik Yoon, Dalsu Choi, Yon Dohn Chung
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Cohesive Ridesharing Group Queries in Geo-Social Networks
IEEE Access, 2020 Ridesharing has gained much attention as a solution for mitigating societal, environmental, and economic problems. For example, commuters can reduce traffic jams by sharing their rides with others.
Changbeom Shim +2 more
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In-Path Oracles for Road Networks
ISPRS International Journal of Geo-Information, 2023 Many spatial applications benefit from the fast answering to a seemingly simple spatial query: “Is a point of interest (POI) ‘in-path’ to the shortest path between a source and a destination?” In this context, an in-path POI is one that is either on the ...
Debajyoti Ghosh +3 more
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3D TOPOLOGICAL SUPPORT IN SPATIAL DATABASES: AN OVERVIEW [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 The storage of spatial data that consists of spatial and non-spatial properties requires a database management system that possesses spatial functions that can cater to the spatial characteristics of data.
S. Salleh, U. Ujang, S. Azri
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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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The Efficient Processing of Moving k-Farthest Neighbor Queries in Road Networks
Algorithms, 2022 Given a set of facilities F and a query point q, a k-farthest neighbor (kFN) query returns the k farthest facilities f1,f1,⋯,fk from q. This study considers the moving k-farthest neighbor (MkFN) query that constantly retrieves the k facilities farthest ...
Hyung-Ju Cho
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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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