Terceira_geospatial_data.gdb.zip (503.46 kB)

Supplementary file geodatabase containing Terceira GIS data

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posted on 06.05.2020 by S. Shinneman, K.F. Rijsdijk

GIS data files with metadata used to calculate the changes in surface area over a 120 ka period in 10 ka time bins on the volcanically active island of Terceira (Azores). We took into account changes in sea level and subsidence during the analyses, and we did all analyses in ESRI ArcGIS 10.2.2 desktop software in WGS_1984_UTM_Zone_26N Transverse Mercator projection which resulted in minimal area distorations (<1%) for the scale of our analysis (1-100 km2).


Kenneth F. Rijsdijk, Simon Buijs, Rui Quartau, Robin Aguilée, Sietze J. Norder, Sérgio P. Ávila, Sara Maria Teixeira de Medeiros, João Carlos Carreiro Nunes, Rui Bento Elias, Carlos Melo, Paulo Stocchi, Stacy Shinneman, Erik Koene, A.C. (Harry) Seijmonsbergen, W. M. (Thijs) de Boer, Paulo A. V. Borges (2020): Recent geospatial dynamics of Terceira (Azores, Portugal) and the theoretic implications for the biogeography of active volcanic islands. Frontiers of Biogeography - Original Research Paper.

Dataset contents

  • A file geodatabase with:
    • Thirteen polygon shapefiles of contours reconstructed for Terceira in time bins of 10 ka for 120 ka until present. The name of volcanic origin (Cinco Picos Volcano, Guillerme Moniz Volcano, Pico Alto Volcano, Santa Barbara Volcano, Basaltic Fissural Area), the age of the event, area and shape of each polygon are included in the attribute tables.
    • Three polygon shapefiles of contours for 141, 270 and 370 ka used for analyses.
    • European Marine Observation and Data Network (EMODNet) bathymetry raster dataset downloaded from EMODnet Bathymetry portal (http://www.emodnet-bathymetry.eu) and clipped to study area and immediate surroundings


Retention period




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