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Published May 31, 2022 | Version v1.2
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Digital Elevation Models, orthoimages and lava outlines of the 2021 Fagradalsfjall eruption: Results from near real-time photogrammetric monitoring

  • 1. Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Sturlugata 7, 102 Reykjavík, Iceland.
  • 2. National Land Survey of Iceland, Stillholt 16–18, 300 Akranes, Iceland & Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Sturlugata 7, 102 Reykjavík, Iceland.
  • 3. Icelandic Institute of Natural History, Urriðaholtsstræti 6–8, 210 Garðabær, Iceland.
  • 4. Icelandic Institute of Natural History, Urriðaholtsstræti 6–8, 210 Garðabær, Iceland. Institute of Geological Sciences, University of Bern, Baltzerstrasse 3, 3012 Bern, Switzerland.
  • 5. Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, Univ. Gustave Eiffel, ISTerre, 38000 Grenoble, France.
  • 6. Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, Centre National de la Recherche Scientifique (LEGOS – CNRS, UMR5566), Université de Toulouse, 31400 Toulouse, France
  • 7. Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Sturlugata 7, 102 Reykjavík, Iceland. The University of Arizona, 1629 E University Blvd Tucson, AZ 85721-0092, USA.
  • 8. National Land Survey of Iceland, Stillholt 16–18, 300 Akranes.
  • 9. Faculty of Civil and Environmental Engineering, University of Iceland, Dunhagi 5, 107 Reykjavík, Iceland.
  • 10. The National Power Company of Iceland (Landsvirkjun), Háaleitisbraut 68, 103 Reykjavík, Iceland.
  • 11. The Department of Civil Protection and Emergency Management, Skógarhlíð 14, 105 Reykjavík, Iceland.

Description

This repository contains the data behind the work described in Pedersen et al (in review), specifically the Digital Elevation Models (DEMs), orthoimages and lava outlines created as part of the near-real time monitoring of the Fagradalsfjall 2021 eruption (SW-Iceland).

The processing of the data is explained in detail in the Supplement S2 of Pedersen et al (2022).

The data derived from Pléiades surveys includes only the DEMs and the lava outlines. The Pléiades-based orthoimages are subject to license. Please contact the authors for further information about this.

Convention for file naming:

Data: DEM, Ortho, Outline

YYYYMMDD_HHMM: Date of acquisition

Platform used: Helicopter (HEL), Pléiades (PLE), Hasselblad A6D (A6D)

Origin of elevations in DEMs: meters above ellipsoid (zmae)

Ground Sampling Distance: 2x2m (DEM) and 30x30cm (Ortho)

Cartographic projection: isn93 (see cartographic specifications for further details)

 

Cartographic specifications:

Cartographic projection: ISN93/Lambert 1993 (EPSG: 3057, https://epsg.io/3057)

Horizontal and vertical reference frame: The surveys after 18 April 2021 are in ISN2016/ISH2004, updated locally around the study area in April 2021 (after pre-eruptive deformations occurred). The rest of the surveys of late March and early April were created using several floating reference systems (see Supplement S3 for details), since no ground surveys were available during the first weeks of the data collection. The surveys of 23 March 2021, 31 March 2021 were re-procesed in Gouhier et al., 2022, using the survey done on 18 May 2021 as reference.

Origin of elevations: Ellipsoid WGS84

Raster data format: GeoTIFF

Raster compression system: ZSTD (http://facebook.github.io/zstd/)

Vector data format: GeoPackage (https://www.geopackage.org/)

Files

dems_pedersen_etal2022.zip

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Additional details

References

  • Pedersen, G. B. M., Belart, J. M. C., Óskarsson, B. V., Gudmundsson, M. T., Gies, N., Högnadóttir, T., et al. (2022). Volume, effusion rate, and lava transport during the 2021 Fagradalsfjall eruption: Results from near real-time photogrammetric monitoring. Geophysical Research Letters, 49, e2021GL097125. https://doi.org/10.1029/2021GL097125
  • Gouhier, M., Pinel, V., Belart, J.M.C. et al. CNES-ESA satellite contribution to the operational monitoring of volcanic activity: The 2021 Icelandic eruption of Mt. Fagradalsfjall. J Appl. Volcanol. 11, 10 (2022). https://doi.org/10.1186/s13617-022-00120-3