The dataset is an Imhof-inspired cartographic base map combining topography and bathymetry, covering European countries and adjacent marine areas. The map has been constructed by merging several existing digital elevation models, with topography primarily based on EU-DEM v1.1 and the Shuttle Radar Topography Mission (SRTM), and bathymetry derived from the General Bathymetric Chart of the Oceans (GEBCO). The dataset provides a continuous surface integrating land and marine areas and has been developed with a focus on visual quality and regional applications.

Uniform vertical aerial photographic coverage of Greenland was achieved between 1978 and 1987 at a scale of 1:150.000 by Mark Hurd Aerial Surveys, Inc., Minneapolis, Minnesota, U.S.A., on behalf of the Danish Geodetic Institute. The photography provided systematic nationwide coverage and formed a fundamental reference dataset for mapping and geodetic purposes. The black-and-white photographs were acquired using a Wild RC-10 camera equipped with a super wide-angle lens (focal length 88 mm). The aircraft used was a Gates Learjet 25C, flying at approximately 14 km altitude to achieve the image scale of 1:150.000. To minimise blind areas caused by steep mountain slopes in combination with the wide-angle lens, photographs were acquired with 80% forward overlap and 40% side overlap. Photo centre coordinates were established through aerotriangulation performed by the Danish Geodata Agency. The dataset has subsequently been used for mapping, aerotriangulation and scanning applications.