Results 11 to 20 of about 1,724,437 (198)

An LSM-Tree Index for Spatial Data

open access: yesAlgorithms, 2022
An LSM-tree (log-structured merge-tree) is a hierarchical, orderly and disk-oriented data storage structure which makes full use of the characteristics of disk sequential writing, which are much better than those of random writing.
Junjun He, Huahui Chen
doaj   +1 more source

DAPR-tree: a distributed spatial data indexing scheme with data access patterns to support Digital Earth initiatives

open access: yesInternational 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

QUASII: QUery-Aware Spatial Incremental Index. [PDF]

open access: yes, 2018
With large-scale simulations of increasingly detailed models and improvement of data acquisition technologies, massive amounts of data are easily and quickly created and collected.
Ailamaki, A   +3 more
core   +2 more sources

Spatio-textual indexing for geographical search on the web [PDF]

open access: yes, 2005
Many web documents refer to specific geographic localities and many people include geographic context in queries to web search engines. Standard web search engines treat the geographical terms in the same way as other terms. This can result in failure
Joho, H.   +3 more
core   +4 more sources

Optimization of Spatial Joins Using Filters [PDF]

open access: yes, 1995
When viewing present-day technical applications that rely on the use of database systems, one notices that new techniques must be integrated in database management systems to be able to support these applications efficiently.
Apers, P.M.G.   +2 more
core   +9 more sources

Improving Spatial neighbor Index Performance Based on [PDF]

open access: yesKirkuk 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

Vector Spatial Big Data Storage and Optimized Query Based on the Multi-Level Hilbert Grid Index in HBase

open access: yesInformation, 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

open access: yesIEEE 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

open access: yesEarth 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

Survey of Continuous Queries over Spatial-Textual Data Streams

open access: yesJisuanji 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

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