SPOT6 Avalanche outlines 24 January 2018

Outlines of 18'737 avalanches mapped from SPOT6 satellite data over the Swiss Alps on 24 January 2018. The outlines have different attributes described in the data example key (ExampleKey_AvalMapping.pdf)

The generation of the data is described in:

Bühler, Y., E. D. Hafner, B. Zweifel, M. Zesiger, and H. Heisig (2019), Where are the avalanches? Rapid SPOT6 satellite data acquisition to map an extreme avalanche period over the Swiss Alps, The Cryosphere, 13(12), 3225-3238, doi:10.5194/tc-13-3225-2019.

Abstract. Accurate and timely information on avalanche occurrence are key for avalanche warning, crisis management and avalanche documentation. Today such information is mainly available at isolated locations provided by observers in the field. The achieved reliability considering accuracy, completeness and reliability of the reported avalanche events is limited. In this study we present the spatial continuous mapping of a large avalanche period in January 2018 covering the majority of the Swiss Alps (12’500 km2).

We tested different satellite sensors available for rapid mapping during a first avalanche period. Based on these experiences, we tasked SPOT6/7 data for data acquisition to cover the second, much larger avalanche period. We manually mapped the outlines of 18’737 individual avalanche events, applying image enhancement techniques to analyze regions in cast shadow as well as brightly illuminated ones. The resulting dataset of mapped avalanche outlines, having a unique completeness and reliability, is evaluated to produce maps of avalanche occurrence and avalanche size. We validated the mapping of the avalanche outlines using photographs acquired from helicopters just after the avalanche period.

This study demonstrates the applicability of optical, very high spatial resolution satellite data to map an exceptional avalanche period with very high completeness, accuracy and reliability over a large region. The generated avalanche data is of great value to validate avalanche bulletins, complete existing avalanche databases and for research applications by enabling meaningful statistics on important avalanche parameters.

Koordinate System: CH1903+ LV95 LN02

Funding Information:

This work was supported by:
  • BAFU
  • Kanton Wallis

Related Datasets

Related Publications

  • Bühler, Y., E. D. Hafner, B. Zweifel, M. Zesiger, and H. Heisig (2019), Where are the avalanches? Rapid SPOT6 satellite data acquisition to map an extreme avalanche period over the Swiss Alps, The Cryosphere, 13(12), 3225-3238, https://doi.org/10.5194/tc-13-3225-2019.

  • Hafner, E. D., Barton, P., Daudt, R. C., Wegner, J. D., Schindler, K., and Bühler, Y.: Automated avalanche mapping from SPOT 6/7 satellite imagery with deep learning: results, evaluation, potential and limitations, The Cryosphere, 16, 3517-3530, https://doi.org/10.5194/tc-16-3517-2022, 2022.

  • Hafner, E.D.; Techel, F.; Leinss, S.; Bühler, Y., 2021: Mapping avalanches with satellites - evaluation of performance and completeness. Cryosphere, 15, 2: 983-1004. https://doi.org/10.5194/tc-15-983-2021

  • Hafner, E. and Bühler, Y.: Verwendung von optischen Satellitenbildern zur grossflächigen Kartierung von Lawinen, Forum für Wissen 2023. Neue Fernerkundungstechnologien für die Umweltforschung und Praxis., WSL Birmensdorf, https://doi.org/10.55419/wsl:33068, 2023.

Citation:

Hafner, Elisabeth; Bühler, Yves (2019). SPOT6 Avalanche outlines 24 January 2018. EnviDat. doi:10.16904/envidat.77.

DataCite ISO 19139 GCMD DIF README.txt BibTex RIS

Data and Resources

Metadata

Field Values
DOI 10.16904/envidat.77
Publication State Published
Authors
  • Email: elisabeth.hafnerfoo(at)slf.ch Given Name: Elisabeth Family Name: Hafner Affiliation: SLF DataCRediT: Collection, Validation, Publication
  • Email: buehlerfoo(at)slf.ch ORCID: 0000-0002-0815-2717 Given Name: Yves Family Name: Bühler Affiliation: SLF DataCRediT: Validation, Curation, Publication, Supervision
Contact Person Given Name: Yves Family Name: Bühler Email: buehlerfoo(at)slf.ch Affiliation: SLF ORCID: 0000-0002-0815-2717
Subtitles
Publication Publisher: EnviDat Year: 2019
Dates
  • Type: Created Date: 2018-02-28 End Date: 2018-06-30
Version 1.0
Type dataset
General Type Dataset
Language English
Location Switzerland
Content License ODbL with Database Contents License (DbCL)    [Open Data]
Last Updated November 12, 2024, 09:02 (UTC)
Created June 26, 2019, 09:18 (UTC)

Custom Metadata

Custom Field Values
dora_link