PMID- 37989945 OWN - NLM STAT- MEDLINE DCOM- 20231225 LR - 20231225 IS - 1614-7499 (Electronic) IS - 0944-1344 (Linking) VI - 30 IP - 59 DP - 2023 Dec TI - Urban surface classification using semi-supervised domain adaptive deep learning models and its application in urban environment studies. PG - 123507-123526 LID - 10.1007/s11356-023-30843-8 [doi] AB - High-resolution urban surface information, e.g., the fraction of impervious/pervious surface, is pivotal in studies of local thermal/wind environments and air pollution. In this study, we introduced and validated a domain adaptive land cover classification model, to automatically classify Google Earth images into pixel-based land cover maps. By combining domain adaptation (DA) and semi-supervised learning (SSL) techniques, our model demonstrates its effectiveness even when trained with a limited dataset derived from Gaofen2 (GF2) satellite images. The model's overall accuracy on the translated GF2 dataset improved significantly from 19.5% to 75.2%, and on the Google Earth image dataset from 23.1% to 61.5%. The overall accuracy is 2.9% and 3.4% higher than when using only DA. Furthermore, with this model, we derived land cover maps and investigated the impact of land surface composition on the local meteorological parameters and air pollutant concentrations in the three most developed urban agglomerations in China, i.e., Beijing, Shanghai and the Great Bay Area (GBA). Our correlation analysis reveals that air temperature exhibits a strong positive correlation with neighboring artificial impervious surfaces, with Pearson correlation coefficients higher than 0.6 in all areas except during the spring in the GBA. However, the correlation between air pollutants and land surface composition is notably weaker and more variable. The primary contribution of this paper is to provide an efficient method for urban land cover extraction which will be of great value for assessing the urban surface composition, quantifying the impact of land use/land cover, and facilitating the development of informed policies. CI - (c) 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. FAU - Ding, Xiaotian AU - Ding X AD - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China. AD - Center for Balance Architecture, Zhejiang University, Hangzhou, China. AD - International Research Center for Green Building and Low-Carbon City, International Campus, Zhejiang University, Haining, China. FAU - Fan, Yifan AU - Fan Y AD - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China. yifanfan@zju.edu.cn. AD - Center for Balance Architecture, Zhejiang University, Hangzhou, China. yifanfan@zju.edu.cn. AD - International Research Center for Green Building and Low-Carbon City, International Campus, Zhejiang University, Haining, China. yifanfan@zju.edu.cn. FAU - Li, Yuguo AU - Li Y AD - Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, China. FAU - Ge, Jian AU - Ge J AD - College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China. AD - International Research Center for Green Building and Low-Carbon City, International Campus, Zhejiang University, Haining, China. LA - eng GR - 51908489/the National Natural Science Foundation of China (NSFC)/ GR - 2023C03152/"Pioneer" and "Leading Goose" R&D Program of Zhejiang/ GR - 100000-11320/209/Zhejiang University Global Partnership Fund/ PT - Journal Article DEP - 20231121 PL - Germany TA - Environ Sci Pollut Res Int JT - Environmental science and pollution research international JID - 9441769 RN - 0 (Air Pollutants) SB - IM MH - *Deep Learning MH - China MH - *Air Pollution MH - Temperature MH - *Air Pollutants MH - Environmental Monitoring/methods MH - Cities OTO - NOTNLM OT - Air quality OT - Deep learning OT - Domain adaptation OT - Semi-supervised learning OT - Urban environment OT - Urban surface recognition EDAT- 2023/11/22 06:44 MHDA- 2023/12/25 06:42 CRDT- 2023/11/22 00:03 PHST- 2023/07/21 00:00 [received] PHST- 2023/10/29 00:00 [accepted] PHST- 2023/12/25 06:42 [medline] PHST- 2023/11/22 06:44 [pubmed] PHST- 2023/11/22 00:03 [entrez] AID - 10.1007/s11356-023-30843-8 [pii] AID - 10.1007/s11356-023-30843-8 [doi] PST - ppublish SO - Environ Sci Pollut Res Int. 2023 Dec;30(59):123507-123526. doi: 10.1007/s11356-023-30843-8. Epub 2023 Nov 21.