**3. Conclusions**

The Guest Editors of this Special Issue would like to thank all authors who have contributed to this volume for publishing their research findings. Our special thanks also go to anonymous reviewers for their hard working and providing their valuable and insightful comments to help the authors improve their paper presentations and quality. Last but not least, we also would like to thank the Remote Sensing editorial team for its support during the tedious process. This volume would not have completed without their help.

**Funding:** The research of Chein-I Chang was funded by the Fundamental Research Funds for Central Universities under Grant 3132019341. The research of Meiping Song was funded by National Nature Science Foundation of China (61601077) and Fundamental Research Funds for the Central Universities (3132017124). The research of Junping Zhang was funded by National Natural Science Foundation of China (61871150). The research of Chao-Cheng Wu was funded by MOST 108-2321-B-002-025-.

**Conflicts of Interest:** The Guest editors declare no conflict of interest.
