Results 11 to 20 of about 4,530 (76)

Integrating OpenStreetMap tags for efficient LiDAR point cloud classification using graph neural networks

International Journal of Digital Earth
The urban environment exhibits significant vertical variations, Light Detection and Ranging (LiDAR) point cloud classification can provide insights for the 3D morphology of the urban environment.
Yanming Chen, Guoli Li, Xiaoqiang Liu, Yueqian Shen, Jia Li, Qin Tian   +5 more
doaj   +1 more source

A new multi-source remote sensing image sample dataset with high resolution for flood area extraction: GF-FloodNet

International Journal of Digital Earth, 2023
Deep learning algorithms show good prospects for remote sensing flood monitoring. They mostly rely on huge amounts of labeled data. However, there is a lack of available labeled data in actual needs.
Yuwei Zhang, Peng Liu, Lajiao Chen, Mengzhen Xu, Xingyan Guo, Lingjun Zhao   +5 more
doaj   +1 more source

A time feature modeling and expression method for vague geographic processes

International Journal of Digital Earth
Geographic processes are dynamic, wherein geographical entities and phenomena change over time and are characterized by vagueness. However, most studies on geographic processes employ precise expression methods to describe and express the changing ...
Yue Yin, Yufeng He, Yizhe Feng, Xueying Zhang, YeHua Sheng   +4 more
doaj   +1 more source

Evolutionary PSO-based emergency monitoring geospatial edge service chain in the emergency communication network

International Journal of Digital Earth, 2023
Emergency communication networks play a vital role in disaster monitoring, transmission, and application during disaster emergency response (DER), however, the performance and stability of edge nodes in the emergency communication networks are often weak
Sheng He, Xicheng Tan, Yanfei Zhong, Meng Huang, Zhiyuan Mei, You Wan, Huaming Wang   +6 more
doaj   +1 more source

A novel spectral index for mapping blue colour-coated steel roofs (BCCSRs) in urban areas using Sentinel-2 data

International Journal of Digital Earth, 2023
Blue colour-coated steel roofs (BCCSRs) offer a lightweight and economical option to concrete and other cladding in buildings, but they are also controversial for altering the surface energy budget and water cycle.
Chuanwu Zhao, Yaozhong Pan
doaj   +1 more source

Feedback and contribution of vegetation, air temperature and precipitation to land surface temperature in the Yangtze River Basin considering statistical analysis

International Journal of Digital Earth, 2023
Land surface temperature (LST), especially day-night LST difference $\lpar {{\rm LS}{\rm T}_{\rm d}-{\rm LS}{\rm T}_{\rm n}} \rpar$, is a key variable for the stability of terrestrial ecosystems, affected by vegetation and climate change. Quantifying the
Jinlian Liu, Xinyao Zhou, Hanya Tang, Fengqin Yan, Shiwei Liu, Xuguang Tang, Zhi Ding, Ke Jiang, Pujia Yu   +8 more
doaj   +1 more source

Street network patterns for mitigating urban heat islands in arid climates

International Journal of Digital Earth, 2023
This study explores the impact of street pattern measurements on urban heat islands (UHI) in the arid climate of Mashhad, Iran. The Landsat-8 top-of-the-atmosphere (TOA) brightness images from 2013 to 2021, average values of normalized difference ...
Kimia Chenary, Ali Soltani, Ayyoob Sharifi   +2 more
doaj   +1 more source

Spatiotemporal analysis of the impact of urban landscape forms on PM2.5 in China from 2001 to 2020

International Journal of Digital Earth, 2023
Urban landscape forms can be effective in reducing increasing PM2.5 concentrations due to urbanization in China, making it crucially important to accurately quantify the spatiotemporal impact of urban landscape forms on PM2.5 variations.
Shoutao Zhu, Jiayi Tang, Xiaolu Zhou, Peng Li, Zelin Liu, Cicheng Zhang, Ziying Zou, Tong Li, Changhui Peng   +8 more
doaj   +1 more source

High-resolution land cover classification: cost-effective approach for extraction of reliable training data from existing land cover datasets

International Journal of Digital Earth, 2023
There has been a significant increase in the availability of global high-resolution land cover (HRLC) datasets due to growing demand and favorable technological advancements. However, this has brought forth the challenge of collecting reference data with
Gorica Bratic, Vasil Yordanov, Maria Antonia Brovelli   +2 more
doaj   +1 more source

A new approach to LST modeling and normalization under clear-sky conditions based on a local optimization strategy

International Journal of Digital Earth, 2022
The normalization of LST relative to environmental parameters is of great importance in various environmental applications. The purpose of this study was to develop a new approach for LST normalization relative to environmental variables.
Majid Kiavarz, Mohammad Karimi Firozjaei, Seyed Kazem Alavipanah, Quazi K. Hassan, Yoann Malbéteau, Si-Bo Duan   +5 more
doaj   +1 more source