The dataset represents a nationwide mapping of buried valleys in Denmark. The map depicts the occurrence, distribution and general geometry of mapped buried valleys in the Danish subsurface. Buried valleys are elongated depressions in the subsurface that are today fully or partly infilled with younger sediments. In Denmark, the majority of mapped buried valleys are interpreted to have formed during repeated glaciations in the Quaternary period. The valleys are typically 0.5–2 km wide and may reach depths of up to approximately 400 m. The dataset is based on interpretation of geophysical data, primarily TEM and SkyTEM surveys, supplemented by seismic data and borehole information. The mapping provides a national overview of buried valleys and forms a key basis for understanding the geological framework of the subsurface.

This dataset represents a map of ice margin lines and related localities in Scandinavia, illustrating the gradual deglaciation of the Scandinavian Ice Sheet during the last glaciation, the Weichsel Ice Age. The map depicts the ice sheet extent in five main deglaciation phases, as well as the occurrence of recent ice caps, ice-margin localities, De Geer moraines, ice margin lines and hypothetical ice margin lines. The dataset was compiled in 1995 in connection with TemaNord and presents a regional overview of the deglaciation history of Scandinavia. GEUS has provided technical input in producing the ice margin map.

Map showing information about drinking water hardness (dH) at the level of water supply areas of public waterworks in Denmark based on quality-assured data, extracted from the national well-database Jupiter in September 2023. The hardness degree is based on the concentration of calcium and magnesium in the drinking water and has importance, for example, for the soap dosage when washing clothes: hard water requires more soap than soft water. Drinking water hardness may vary considerably from location to location and in time. Contact your water utility company to get the updated and precise figures.

This repository contains maps of the thickness of late glacial and Holocene deposits in the Danish sea area, prepared as a basis for planning offshore wind. These are unconsolidated sediments that have not been overrun by the ice sheets of the ice ages, and therefore may have low geotechnical strength parameters. This is a large-scale and very general mapping, and no detailed interpretation of the distribution of sand and clay/mud/silt, respectively, has been made. In relation to the foundations of offshore wind turbines, sandy deposits will typically not pose a challenge, while soft deposits of clay, mud and silt in large thicknesses are assumed to pose foundation challenges. In addition to separate maps of the thickness of late glacial and Holocene deposits, a map of the total thickness of these two units has also been prepared, which thus constitutes a map of the total thickness of potentially soft sediments. Finally, the thickness of potentially soft sediments is used to divide the Danish sea area into categories in relation to the probability of larger thicknesses of soft sediments that could give rise to foundation challenges. Other maps are the thickness of potentially soft glacial lake sediments in the North Sea, the depth to the Pre-Quaternary surface in the waters around Bornholm, as well as the depth to the base of the Holocene deposits and the depth to the base of the late glacial deposits/top of the glacial deposits in the Danish sea area. As a supplement to the maps, a number of themes show where the late glacial and Holocene deposits are primarily expected to consist of sandy sediments. In addition, a number of themes show the Danish exclusive economic zone (EEZ), the location of conceptual geological models that can be seen in the overall report, all interpreted seismic lines, areas with near-surface gas in the sediments, interpreted distribution of the Palaeo-Elbe Valley in the North Sea, distribution of the Weichsel ice and ice-affected sediments in the North Sea, buried valleys (Prins & Andresen 2019; van der Vegt et al. 2012; Ottesen et al. 2020; Kirkham et al. 2024; Sandersen & Jørgensen 2016), structural elements (Al Hseinat & Hübscher 2017; Jensen et al. 2002), ice margin lines (Lange 1984; Kjær et al. 2003; Pedersen 2005; Phillips et al. 2018, 2022; Kirkham et al. 2024; Szuman et al. 2024; Pedersen & Boldreel 2017). The data basis for the work has primarily been new and existing near-surface seismic data and vibrocore drilling. The mapping was carried out for the Danish Energy Agency by GEUS, and is intended to support the development of offshore wind. The results, together with a sensitivity mapping of natural and environmental parameters, initiated by the Danish Energy Agency, are to be included in an overall assessment of suitable areas for offshore wind in Denmark.

The dataset shows the thickness of Quaternary deposits in Denmark. The thickness has been calculated as the difference between surface elevation and the depth to the top of the pre-Quaternary deposits. The map provides a nationwide overview of variations in Quaternary thickness and is used in geological, hydrogeological and planning-related contexts.

The Height and Depth Map of Denmark is a coherent map showing both land elevation above sea level and sea depth within the Danish area. The map is based on elevation and bathymetric data represented by 5-metre contour intervals closed to polygons and provides continuous coverage across the land–sea boundary. The dataset offers an integrated overview of terrain and bathymetry in Denmark and surrounding waters. The terrestrial elevation component is derived from topographic data suitable for use at scales down to approximately 1:25.000, while the bathymetric component is compiled from datasets of varying origin and resolution. The map was originally assembled around 1997, with subsequent updates to the Danish land areas carried out during 2005–2006. The dataset is primarily intended for regional visualisation and analysis.

The Geomorphological Map of Denmark, version 3 (2022), depicts landscape types across Denmark at a scale of 1:200.000. The landscape types are defined based on shared geomorphological characteristics that can be related to the processes responsible for their formation. Most landscape types were formed during Quaternary glaciations and by meltwater from the glaciers, while the map also includes post-glacial landscapes such as marine and coastal environments, river valleys, lakes and wetlands, as well as aeolian landforms. The map further reflects landscape features influenced by pre-Quaternary bedrock, including exposed crystalline basement on Bornholm and chalk formations in northern Jutland, as well as surface features related to subsurface structural movements. Anthropogenic landscapes resulting from land reclamation, drainage, excavation, and infilling are also represented. The map is based on systematic geomorphological mapping and interpretation of landforms derived from geological data, terrain analysis and existing cartographic material.

This dataset represents a nationwide digital geological map of superficial deposits in Denmark at a scale of 1:200.000. The map shows the classification and distribution of near-surface deposits, primarily glacial and post-glacial sediments. The dataset is based on the Digital Soil and Sediment Map of Denmark at 1:25.000 in areas where detailed mapping is available. In other areas, the distribution of deposits has been interpreted based on borehole data, landscape analysis and other available geological information. The deposits are classified into 12 generalised types, making the dataset a simplified and generalised version of the detailed 1:25.000 map. The dataset provides a national overview of superficial deposits and serves as a reference for regional and national applications.

The dataset shows the depth to the redox interface in metres below ground level across Denmark at a spatial resolution of 100 metres. The redox interface represents the transition between oxidised and reduced sediment layers and is a key hydrogeological parameter influencing processes such as nitrate reduction and groundwater chemistry. The map is based on a statistical model developed from approximately 13.000 observations of colour changes in sediment samples and represents the best estimate of the depth to the redox interface nationwide. The dataset also includes an associated uncertainty estimate describing the variability and robustness of the model results.

This dataset represents the pre-Quaternary surface topography of Denmark, including Kattegat, internal waters and the sea around Bornholm. The map provides a paleotopographic relief of the surface that existed prior to deposition of Quaternary sediments, compiled from geological borehole data, seismic surveys and topographic sources. It includes polygons with 25 m contour intervals, a 500 m grid and boundary delineations, usable in combination with a standard elevation model to determine Quaternary cover thickness. The base map was hand-drawn at 1:250,000 scale and forms a nationwide thematic map product. The map is described in DGU map series no. 44, 1994.