Dataset Open Access

Digital Elevation Models, orthoimages and lava outlines of the 2021 Fagradalsfjall eruption: Results from near real-time photogrammetric monitoring

Pedersen, Gro B.M.; Belart, Joaquín M.C.; Óskarsson, Birgir V.; Gudmundsson, Magnús T.; Gies, Nils; Högnadóttir, Thórdís; Hjartadótti, Ásta R.; Pinel, Virginie; Berthier, Etienne; Dürig, Tobias; Reynolds, Hannah I.; Hamilton, Christopher W.; Valsson, Guðmundur; Einarsson, Páll; Ben-Yehosua, Daniel; Gunnarsson, Andri; Oddsson, Björn

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 (in review).

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,

Horizontal and vertical reference frame: ISN2016/ISH2004, updated locally around the study area in April 2021 (after pre-eruptive deformations occurred)

Origin of elevations: Ellipsoid WGS84

Raster data format: GeoTIFF

Raster compression system: ZSTD (

Vector data format: GeoPackage (

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