Results 11 to 20 of about 117,286 (265)
Approximate MaxRS in spatial databases [PDF]
Proceedings of the VLDB Endowment, 2013 In the maximizing range sum (MaxRS) problem, given (i) a setPof 2D points each of which is associated with a positive weight, and (ii) a rectanglerof specific extents, we need to decide where to placerin order to maximize the covered weight ofr- that is, the total weight of the data points covered byr.
Yufei Tao 0001 +3 more
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Global Center Point Splitting: New Linear Node Splitting Algorithm for R-Trees [PDF]
مجلة جامعة النجاح للأبحاث العلوم الطبيعية, 2016 We introduce a new linear algorithm to split overflowed nodes of an R-tree index called the Global Center Point Splitting (GCPS) algorithm. The proposed method is an enhancement of the Quadratic splitting algorithm proposed by Guttmann (Guttman A, 1984 ...
Manar Arafat
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Spatial searching in geometric databases [PDF]
Proceedings. Fourth International Conference on Data Engineering, 2003 A principle is presented for transforming suitable index structures for points into index structures for k-dimensional intervals. In many applications, these intervals serve as simple geometric keys for nonzero-size objects. The transformation fully preserves the advantages of the selected index structure for points, such as efficient update and ...
Six, Hans-Werner, Widmayer, Peter
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Spatial Multi-Criteria Analysis of Water-Covered Areas: District City of Katowice—Case Study
Remote Sensing, 2023 The following databases contains information on land use with water in Poland: Corine Land Cover (CLC), the Urban Atlas (UA); Database of Topographic Objects (BDOT) the digital Map of Poland’s Hydrographic Division (MPHP); and the Register of Lands and ...
Natalia Janczewska +3 more
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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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