Results 21 to 30 of about 425,485 (215)
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
doaj +1 more source
QRB-tree Indexing: Optimized Spatial Index Expanding upon the QR-tree Index
ISPRS International Journal of Geo-Information, 2021 Support for region queries is crucial in geographic information systems, which process exact queries through spatial indexing to filter features and subsequently refine the selection.
Jieqing Yu, Yi Wei, Qi Chu, Lixin Wu
doaj +1 more source
International Journal of Digital Earth, 2020 This paper proposes a novel data indexing scheme, the distributed access pattern R-tree (DAPR-tree), for spatial data retrieval in a distributed computing environment.
Jizhe Xia +6 more
doaj +1 more source
Improving Spatial neighbor Index Performance Based on [PDF]
Kirkuk Journal of Science, 2014 Spatial data consists of objects in space made up of points, lines, regions and data of higher dimensions. Access method is required to support efficient manipulation of the multi-dimensional spatial objects in the secondary storage.
Nzar Abdulqader Ali Payman Othman Rahem
doaj +1 more source
Information, 2018 Faced with the rapid growth of vector data and the urgent requirement of low-latency query, it has become an important and timely challenge to effectively achieve the scalable storage and efficient access of vector big data.
Hua Jiang +6 more
doaj +1 more source
Improving NoSQL Storage Schema Based on Z-Curve for Spatial Vector Data
IEEE Access, 2019 NoSQL database can provide massive, high concurrency, and scalable services for storing different types of data. HBase, a type of NoSQL database, in which columns are grouped into column families, is very suitable for storing semi-structured or ...
Dongfang Zhang +3 more
doaj +1 more source
A Lacunarity‐Based Index for Spatial Heterogeneity
Earth and Space Science, 2022 Characterizing spatial heterogeneity is fundamental in numerous areas, yet defining spatial patterns often depends on qualitative assessments or a priori knowledge.
R. Scott +4 more
doaj +1 more source
Spatial autocorrelation equation based on Moran’s index
Scientific Reports, 2023 Moran’s index is an important spatial statistical measure used to determine the presence or absence of spatial autocorrelation, thereby determining the selection orientation of spatial statistical methods.
Yanguang Chen
doaj +1 more source
Survey of Continuous Queries over Spatial-Textual Data Streams
Jisuanji kexue yu tansuo, 2021 The continuous queries over spatial-textual data streams (CQST) are widely used in location-based services, which continuously monitor the results satisfying spatial and textual constraints over updated data streams.
YANG Rong, NIU Baoning
doaj +1 more source
QML: a hybrid spatial index structure
Tongxin xuebao, 2021 In order to enrich the functionalities of existing learned multidimensional indexes and improve the efficiency， the dynamic data segmentation algorithm DDSA was proposed， which could preserve the data distribution characteristics.A hybrid spatial index ...
Dong CUI +3 more
doaj +2 more sources