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Lijun Wang, Linshu Hu, Chenhua Fu, Yuhan Yu, Peng Tang, Feng Zhang and Renyi Liu
The spatial learned index constructs a spatial index by learning the spatial distribution, which performs a lower cost of storage and query than the spatial indices. The current update strategies of spatial learned indices can only solve limited updates ...
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Bowen Zhang, Ying Chen, Xingwei Chen, Lu Gao and Meibing Liu
Under climate change, the frequency of drought-flood abrupt alternation (DFAA) events is increasing in Southeast China. However, there is limited research on the evolution characteristics of DFAA in this region. This study evaluated the effectiveness of ...
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Chengpeng Li, Xi Kuai, Biao He, Zhigang Zhao, Haojia Lin, Wei Zhu, Yu Liu and Renzhong Guo
(1) Background: The smart city management system, with GIS technology as its core, is based on realistic visualization of multiple types of 3D model data syntheses. However, the efficiency barriers to achieving smooth and continuous visualization from ou...
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Gyuwon Jeon, Yujin Park and Jean-Michel Guldmann
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Karel Macku, Jaroslav Burian and Hynek Vodicka
Although quality of life is a phenomenon with a significant geographical component, its assessment is often only based on non-spatial statistical data. In Czechia, there are currently several assessments of quality of life at the level of municipalities,...
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Quan Zhu and Shuang Liu
National-level traditional villages in Liandu District and Qingyuan County, Lishui City, in the southwestern mountainous area of Zhejiang Province serve as research objects in our exploration of the external representation and deep spatial structure chan...
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Yelong Zhao, Jinsong Chen and Xiaoli Li
Guangzhou and Shenzhen are two core cities in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA). It is increasingly important to regulate water quality in urban development. The Forel?Ule Index (FUI) can be obtained by optical data and is an important...
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Yumeng Gu, Chunjie Qi, Fuxing Liu, Quanyong Lei and Yuchao Ding
In this study, the DEA?Malmquist index method was used to measure the total factor productivity of citrus in seven major mandarin-producing provinces and seven major tangerine-producing provinces in China from 2006 to 2020. Moran?s I index was used to te...
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Qi Liu, Jiajun Qiao, Dong Han, Mengjuan Li and Liangxiao Shi
Cultivated land is a vital factor in agricultural production but faces multiple challenges, including declining total area, spatial transformation, and ecological degradation. It is imperative to enhance cultivated land use eco-efficiency (CLUE). This st...
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Junjun He and Huahui Chen
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. However, an LSM-tree c...
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Md. Mostafizur Rahman and György Szabó
In urban land use optimization problems, different conflicting objectives are applied. One of the most significant goals in urban land use optimization problems is to maximize environmental benefits. To quantify environmental benefits in land use optimiz...
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Qianqian Zhou, Nan Chen and Siwei Lin
The UN 2030 Agenda sets poverty eradication as the primary goal of sustainable development. An accurate measurement of poverty is a critical input to the quality and efficiency of poverty alleviation in rural areas. However, poverty, as a geographical ph...
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Yunong Zhang, Anmin Zhang, Miao Gao and Yi Liang
The three-dimensional (3D) visualization of the electronic navigation chart (ENC) can reflect the marine environment and various marine features truly, accurately, and directly, to reduce misoperation during chart use and improve the convenience of using...
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Salwa Rizqina Putri, Arie Wahyu Wijayanto and Anjar Dimara Sakti
Poverty data are usually collected through on-the-ground household-based socioeconomic surveys. Unfortunately, data collection with such conventional methods is expensive, laborious, and time-consuming. Additional information that can describe poverty wi...
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Tariq Ahmed Awan, Muhammad Usman Arshid, Malik Sarmad Riaz, Moustafa Houda, Mirvat Abdallah, Muhammad Shahkar, Mirsina Mousavi Aghdam and Marc Azab
Geotechnical investigation, in hilly areas, for high-rise projects, becomes a problematic issue and costly process due to difficulties in mobilization and assembling the drilling equipment on mountainous terrains. The objective of this study is to map so...
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Xiangqiang Min, Dieter Pfoser, Andreas Züfle and Yehua Sheng
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...
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Lingbo Liu, Tao Hu, Shuming Bao, Hao Wu, Zhenghong Peng and Ru Wang
(1) Background: Human mobility between geographic units is an important way in which COVID-19 is spread across regions. Due to the pressure of epidemic control and economic recovery, states in the United States have adopted different policies for mobilit...
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Yongwei Liu and Wang Liao
The characteristics of information flow, as represented by the Baidu index, reflect the pattern of tourism flows between different cities. This paper is based on the Baidu index and applies the seasonal concentration index and social network analysis (SN...
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Zebang Liu, Luo Chen, Anran Yang, Mengyu Ma and Jingzhi Cao
In the big data era, rapid visualization of large-scale vector data has become a serious challenge in Geographic Information Science (GIS). To fill the gap, we propose HiIndex, a spatial index that enables real-time and interactive visualization of large...
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Jieqing Yu, Yi Wei, Qi Chu and Lixin Wu
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. Although the filtering step has been extensively studied, the refineme...
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