SenDiT: The Sentinel-2 Displacement Toolbox with Application to Glacier Surface Velocities
| Autor: | Pablo J. González, Liss M. Andreassen, Robert A. Duller, T. Nagy |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
glacier dynamics
Geographic information system Displacement semi-automatic toolbox Science Jakobshavn Isbræ Terrain displacement semi-automatic toolbox Displacement (vector) satellite optical imagery Sentinel 2 Satellite imagery feature tracking Remote sensing geography geography.geographical_feature_category Satellite optical imagery Norway business.industry SenDiT Jostedalsbreen Glacier glacier velocity Toolbox Displacement mapping Feature tracking Glacier velocity General Earth and Planetary Sciences Satellite business Glacier dynamics Geology |
| Zdroj: | Remote Sensing, Vol 11, Iss 10, p 1151 (2019) Digital.CSIC. Repositorio Institucional del CSIC instname REMOTE SENSING Remote Sensing Volume 11 Issue 10 |
| Popis: | Satellite imagery represents a unique opportunity to quantify the spatial and temporal changes of glaciers world-wide. Glacier velocity has been measured from repeat satellite scenes for decades now, yet a range of satellite missions, feature tracking programs, and user approaches have made it a laborious task. To date, there has been no tool developed that would allow a user to obtain displacement maps of any specified glacier simply by establishing the key temporal, spatial and feature tracking parameters. This work presents the application and development of a unique, semi-automatic, open-source, flexible processing toolbox for the retrieval of displacement maps with a focus on obtaining glacier surface velocities. SenDiT combines the download, pre-processing, feature tracking, and postprocessing of the highest resolution Sentinel-2A and Sentinel-2B satellite images into a semi-automatic toolbox, leaving a user with a set of rasterized and georeferenced glacier flow magnitude and direction maps for their further analyses. The solution is freely available and is tailored so that non-glaciologists and people with limited geographic information system (GIS) knowledge can also benefit from it. The system can be used to provide both regional and global sets of ice velocities. The system was tested and applied on a range of glaciers in mainland Norway, Iceland, Greenland and New Zealand. It was also tested on areas of stable terrain in Libya and Australia, where sources of error involved in the feature tracking using Sentinel-2 imagery are thoroughly described and quantified. This work is a contribution to the project Copernicus bretjeneste (Contract NIT.06.15.5), which is partly funded by the Norwegian Space Centre through Copernicus. |
| Databáze: | OpenAIRE |
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