Results 21 to 30 of about 437,980 (285)
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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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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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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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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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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Positional quality assessment based on linear elements
Revista Cartográfica, 2021 This study describes the current state of the art related to the assessment of the positional accuracy of spatial databases based on lines. The use of this type of element of spatial databases has increased in recent years because of the current ...
Antonio Tomás Mozas-Calvache
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