Results 21 to 30 of about 1,724,437 (198)

QML: a hybrid spatial index structure

open access: yesTongxin 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

Spatial autocorrelation equation based on Moran’s index

open access: yesScientific 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

Spatial statistics applied to soybean production data from Paraná State for 2003-04 to 2009-10 crop-years [PDF]

open access: yesEngenharia Agrícola, 2014
In the current study, we performed a soybean production spatial distribution analysis in Paraná State. Seven crop-year data, from 2003-04 to 2009-10, obtained from the Paraná Department of Agriculture and Supply (SEAB) were used to develop a Boxmap for ...
Victor H. R. Prudente   +4 more
doaj   +1 more source

AE, D ST and their SuperMAG Counterparts : the effect of improved spatial resolution in geomagnetic indices [PDF]

open access: yes, 2020
For decades, geomagnetic indices have been used extensively to parameterize space weather events, as input to various models and as space weather specifications.
Bergin, Aisling   +2 more
core   +2 more sources

Geo-Gap Tree: A Progressive Query and Visualization Method for Massive Spatial Data

open access: yesIEEE Access, 2019
Online visualization and query of massive geo-spatial data are facing increasing challenges with the explosive growth of location-based spatial datasets.
Wei Xiong   +5 more
doaj   +1 more source

Value Transmission and Goal Evolution of Territorial Spatial Governance in the New Era: Response of the Territorial Spatial Planning Index System at the City and County Scale

open access: yesRedai dili, 2021
Through the establishment of the territorial spatial planning system, the logic of territorial spatial governance in the new era has gradually become clear, with ecological civilization construction as the strategic guidance, five development concepts ...
Yue Jun, Fan Pengcan
doaj   +1 more source

An index to characterize the spatial distribution of land use within watersheds and implications for river network nutrient removal and export [PDF]

open access: yes, 2015
The spatial distribution of land use and associated nutrient inputs may influence the efficacy of in-stream nutrient removal; however, the effect of source location on N removal and watershed N export has not been quantified.
Mineau, Madeleine M.   +2 more
core   +2 more sources

Evaluation of interrelatedness of cities in the territorial space of Russia

open access: yesJournal of Economic Structures, 2022
The purpose of the article is to carry out the analysis of interrelatedness of cities in the territorial space of Russia. The evaluation method is based on the calculation of global and local Moran's indexes for determination of interrelatedness of the ...
Inna Manaeva   +2 more
doaj   +1 more source

Time Varying Spatial Downscaling of Satellite-Based Drought Index

open access: yesRemote Sensing, 2021
Drought monitoring is essential to detect the presence of drought, and the comprehensive change of drought conditions on a regional or global scale. This study used satellite precipitation data from the Tropical Rainfall Measuring Mission (TRMM), but ...
Hone-Jay Chu   +3 more
doaj   +1 more source

Effects of feedback, mobility and index of difficulty on deictic spatial audio target acquisition in the horizontal plane [PDF]

open access: yes, 2006
We present the results of an empirical study investigating the effect of feedback, mobility and index of difficulty on a deictic spatial audio target acquisition task in the horizontal plane in front of a user.
Brewster, S.A., Marentakis, G.N.
core   +3 more sources

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