The development of the new magnetic compilation for Greenland (GREENMAG) was initiated in 2021 by the Satellite and Aerogeophysics group at Christian-Albrechts-University (CAU) in Kiel, Germany, in collaboration with GEUS as part of the ESA project GOCE+Greenland. The presented magnetic anomaly map covers all of Greenland, including the Inland Ice and adjacent shelf areas. The map is based on all available modern regional aeromagnetic surveys from Greenland and also includes satellite-based magnetic data where airborne data are not available. The purpose of the compilation is to provide a consistent regional magnetic anomaly map for use in geological interpretation and geoscientific analyses.

The dataset comprises geophysical survey data available through the Greenland Mineral Resources Portal. The data include both released company data and publicly funded survey data, primarily airborne electromagnetic (AEM) and aeromagnetic (Aeromag) surveys. The AEM Greenland 1994–1998 project encompassed high-resolution, multi-parameter airborne surveys including electromagnetic, magnetic and partly radiometric measurements conducted between 1994 and 1998, producing approximately 75,000 line kilometres of data. The Aeromag projects included high-resolution airborne magnetic surveys conducted in 1992, 1995, 1996, 1997, 1998, 1999, 2001, 2012 and 2013, producing more than 550,000 line kilometres of data. The projects were financed by the governments of Greenland and Denmark. The dataset provides regional geophysical coverage supporting geological interpretation, mineral exploration and geoscientific research in Greenland.