Both the reviewers and myself praise the authors for the dedication to improve the manuscript and implement the constructive comments provided by the reviewers.

Dear He Zhang and colleagues,

Thank you for working with AE Richard Gloaguen and his referees during the review and revision process. I am glad to note that your manuscript has improved significantly during this process and am happy to follow the AE's advice.

I have one important request, aimed at improving the readability of your title. Please remove all acronyms and abrviations from the title, writing out PKK, UAV and SfM in full. I understand that this will make for a long title, and that specialists will know the meaning of the shorthand, but the title must be readible to a wide audience.

Please respond efficiently to the prompts of the Copernicus publishers, who will work on the final preparations of the manuscript for publication. This will help bring forward the publication date.

Thank you for submitting your manuscript to ESurf. I trust that it will get good attention.

Niels Hovius