SOURCES.md

General Bathymetric Chart of the Oceans (GEBCO_2020)
GEBCO Compilation Group (2020) GEBCO 2020 Grid (doi:10.5285/a29c5465-b138-234d-e053-6c86abc040b9)

Global Land Ice Measurements from Space (GLIMS version 20200630)
GLIMS and NSIDC (2005, updated 2020): Global Land Ice Measurements from Space glacier database. Compiled and made available by the international GLIMS community and the National Snow and Ice Data Center, Boulder CO, U.S.A. DOI:10.7265/N5V98602

Greenland Ice Mapping Project (GIMP version 1.1)
Howat, I. 2017. MEaSUREs Greenland Ice Mapping Project (GIMP) Land Ice and Ocean Classification Mask, Version 1. [GimpIceMask_90m_v1.1]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/B8X58MQBFUPA. [2020-11-19].

SCAR Antarctic Digital Database (ADD v7.3 and v7.4)
Gerrish, L., Fretwell, P., & Cooper, P. (2021). Medium resolution vector polylines of the Antarctic coastline (7.4) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/824b5350-763e-4933-bb76-09f5d24cb033
Gerrish, L., Fretwell, P., & Cooper, P. (2020). Medium resolution vector polygons of Antarctic rock outcrop (7.3) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/077e1f04-7068-4327-a4f2-71d863f70064