University Of Tasmania
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Application of low-cost UASs and digital photogrammetry for high-resolution snow depth mapping in the Arctic

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journal contribution
posted on 2023-05-19, 15:04 authored by Emiliano CimoliEmiliano Cimoli, Marcer, M, Vandecrux, B, Boggild, CE, Guy Williams, Simonsen, SB
The repeat acquisition of high-resolution snow depth measurements has important research and civil applications in the Arctic. Currently the surveying methods for capturing the high spatial and temporal variability of the snowpack are expensive, in particular for small areal extents. An alternative methodology based on Unmanned Aerial Systems (UASs) and digital photogrammetry was tested over varying surveying conditions in the Arctic employing two diverse and low-cost UAS-camera combinations (500 and 1700 USD, respectively). Six areas, two in Svalbard and four in Greenland, were mapped covering from 1386 to 38,410 m2. The sites presented diverse snow surface types, underlying topography and light conditions in order to test the method under potentially limiting conditions. The resulting snow depth maps achieved spatial resolutions between 0.06 and 0.09 m. The average difference between UAS-estimated and measured snow depth, checked with conventional snow probing, ranged from 0.015 to 0.16 m. The impact of image pre-processing was explored, improving point cloud density and accuracy for different image qualities and snow/light conditions. Our UAS photogrammetry results are expected to be scalable to larger areal extents. While further validation is needed, with the inclusion of extra validation points, the study showcases the potential of this cost-effective methodology for high-resolution monitoring of snow dynamics in the Arctic and beyond.

History

Publication title

Remote Sensing

Volume

9

Issue

11

Article number

1144

Number

1144

Pagination

1-29

ISSN

2072-4292

Department/School

Institute for Marine and Antarctic Studies

Publisher

M D P I AG

Place of publication

Switzerland

Rights statement

Copyright 2017 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

Repository Status

  • Open

Socio-economic Objectives

Social impacts of climate change and variability