An example of an original map sheet made on coordinate paper and containing the information on the distribution of plant species on Surtsey recorded in 1974. Note that this map is only a fragment covering 1 ha square with numbers L16-18, K16-18, I16-18 and J16-18.

 
  Part of: Wasowicz P, Thorsteinsson S, Magnússon B, Einarsson E, Bjarnason V, Bjarnason ÁH, Guðmundsson J, Richter SH, Jónasson R, Sveinbjörnsson B, Magnússon SÞ (2020) Vascular plant colonisation of Surtsey Island (1965-1990) - a dataset. Biodiversity Data Journal 8: e54812. https://doi.org/10.3897/BDJ.8.e54812