期刊
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
卷 179, 期 -, 页码 81-91出版社
ELSEVIER
DOI: 10.1016/j.isprsjprs.2021.07.010
关键词
Live fuel moisture content; MODIS; Convolutional neural network; Time series analysis; Fire risk; Fire danger
类别
资金
- Air Force Office of Scientific Research, Asian Office of Aerospace Research and Development (AOARD) [FA2386-18-1-4030]
- Australian Research Council [DE170100037]
- Australian Government Research Training Program (RTP) Scholarship
This paper introduces the first application of deep learning to estimate LFMC, using historical LFMC ground samples and MODIS time series data. The proposed TempCNN-LFMC model achieved an overall RMSE of 25.57% and a correlation coefficient of 0.74, showing good consistency on accuracy spatial patterns and temporal trends. The trained model also performed well for different vegetation types without requiring prior information.
Live fuel moisture content (LFMC) is an essential variable to model fire danger and behaviour. This paper presents the first application of deep learning to LFMC estimation based on the historical LFMC ground samples of the Globe-LFMC database, as a step towards operational daily LFMC mapping in the Contiguous United States (CONUS). One-year MODerate resolution Imaging Spectroradiometer (MODIS) time series preceding each LFMC sample were extracted as the primary data source for training. The proposed temporal convolutional neural network for LFMC (TempCNN-LFMC) comprises three 1-D convolutional layers that learn the multi-scale temporal dynamics (features) of one-year MODIS time series specific to LFMC estimation. The learned features, together with a few auxiliary variables (e.g., digital elevation model), are then passed to three fully connected layers to extract the non-linear relationships with LFMC. In the primary training and validation scenario, the neural network was trained using samples from 2002 to 2013 and then adopted to estimating the LFMC from 2014 to 2018, achieving an overall root mean square error (RMSE) of 25.57% and a correlation coefficient (R) of 0.74. Good consistency on spatial patterns and temporal trends of accuracy was observed. The trained model achieved a similar RMSE of 25.98%, 25.20% and 25.93% for forest, shrubland, and grassland, respectively, without requiring prior information on the vegetation type.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据