Seabed Sediment Map of Denmark

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. Official metadata Purpose The purpose of the dataset is to provide a consistent, nationwide digital map of superficial deposits in Denmark. The map is used as a basis for geological interpretation, environmental management, land-use planning, resource assessment, as well as education and research. Supplemental Information The dataset is an interpretation-based national map product and is not subject to continuous updates. It represents a generalised overview of the distribution of superficial deposits at the ground surface and should be used in conjunction with more detailed maps and local data where higher spatial resolution or detailed stratigraphic information is required. Lineage The dataset was compiled by the Geological Survey of Denmark and Greenland (GEUS) and represents version 2 of the digital superficial deposits map at a scale of 1:200.000. The map is based on the compilation and harmonisation of existing geological maps, borehole data, geomorphological analyses and previous Quaternary geological investigations. Version 2 includes updates and improvements compared to earlier versions, including revised deposit boundaries and classifications based on new knowledge and quality assurance. During compilation of the dataset, generalisation and adjustments have been applied in certain areas, resulting in a spatial uncertainty of up to approximately 200 m, locally slightly more. The dataset is designed as an overview map at a scale of 1:200.000 and is suitable for educational purposes, regional-scale analyses and as background information for other thematic maps. The dataset is not subject to continuous updates and was published in GEUS Report 2011/19. Mapping of superficial deposits in Denmark has been a core task of the Danish geological surveys since the establishment of the Geological Survey of Denmark (DGU) in 1888. The digital superficial deposits map at a scale of 1:200.000, version 2, builds on this long mapping tradition but represents a modern digital compilation and interpretation based on more recent data and methods.

The Digital Geological Map of Denmark 1:25,000, version 7.0, is a nationwide geological dataset describing the distribution of near-surface soil and sediment types across Denmark. The dataset is produced and maintained by the Geological Survey of Denmark and Greenland (GEUS) and represents the latest version of the digital soil and sediment map at a scale of 1:25,000. The map is based on an integrated interpretation of geological field observations, borehole data, historical analogue maps, and more recent digital datasets. Soil and sediment units are classified according to their lithological and genetic characteristics and represent the dominant materials in the uppermost geological layers. The dataset is continuously updated, and version 7.0 includes both revisions of previously mapped areas and newly mapped regions. The dataset is widely used as a foundation for geological analysis, land-use planning, environmental assessment, groundwater protection, raw material management, research, and education. In version 7 from 2023, 93% of Denmark's land area is classified, and the map is continuously supplemented. The map and sediment type description are published in GEUS report 2023/29, where further information is available. Official metadata Purpose To provide a detailed, consistent, and up-to-date geological map of near-surface soil and sediment types in Denmark for management, analysis, planning, and research purposes. Lineage The Digital Geological Map version 7.0 is the product of a long-term geological data acquisition and mapping program in Denmark. Field surveys and geological observations were carried out from approximately 1888 up to the publication year of 2023. The map is based on compiled geological data from interpreted field maps, boreholes, and systematic digitization of historical analogue maps. Version 7 includes additional mapped areas beyond earlier versions and was produced by the Geological Survey of Denmark and Greenland (GEUS).

Dette datasæt udstiller tykkelseskort over Holocæne og senglaciale aflejringer i danske havområder. Kortene er udarbejdet af GEUS i samarbejde med NIRAS og Miljøstyrelsen som led i Energistyrelsens geologiske screening for storskala havvind. Formålet med datasættet er at give et detaljeret geologisk grundlag, der kan understøtte planlægningen af havvindprojekter i Danmark. De udstillede kort viser variationer i aflejringernes tykkelse og udgør en central reference i NIRAS’ følsomhedsstudie, som vurderer havområders egnethed til etablering af vindenergi. Datasættet præsenteres gennem en dedikeret GEUS-webportal og indgår som et officielt GEUS-produkt. Portalen fungerer både som udstillingsvindue for de endelige geologiske data og som et fagligt referencepunkt i forbindelse med NIRAS’ digitale rapportering.

Det sammenhængende højde- og dybdekort blev udarbejdet omkring 1997, hvor de danske områder blev opdateret i 2005-2006. Det er opbygget af 5 m kurver og er også tilgængeligt som polygoner.  Kortet er kontinuerligt på tværs af grænsen mellem land og hav. Kortet har et polygonlag med datakilder, der viser, hvor dataene for de forskellige områder kommer fra, og hvilken skala de er lavet i.  Kortet er lavet til visning i en skala på 1:500.000. Højde- og dybdekortet er opbygget af to forskellige datasæt: Højdemodel (gitter) med højdekurver (form). Højdemodellen er et 40 cm gitter fra 2014-2015, lavet som en mosaik i 2015. Batymetrimodel (gitter) med dybdekurver (form). Dybdekurverne er med 5 m intervaller fra 2006, som det overordnede kort er lavet ud fra, og som også er tilgængelige som polygoner. Batymetridata blev downloadet fra EMODNET i 2016 og er i øjeblikket det bedste dybdegitter. De danske data kommer fra GST. Gitteret er oprindeligt i længdegrad/breddegrad, men er blevet reprojekteret til ETRS 1989 / UTM zone 32. Den oprindelige cellestørrelse er 0,002 grader, dvs. ca. 126 m bredt og 230 m højt. Det reprojekterede gitter er lavet i 125 m celler ved hjælp af en bilineær interpolation. Farvandsväsnets havdybder over det danske område fra 2005 er også tilgængelige som et 100 m gitter på geocenterserveren. Bemærk venligst, at dette gitter er blevet flyttet ca. 120 m mod nordøst.

Dette datasæt udstiller tykkelseskort over Holocæne og senglaciale aflejringer i danske havområder. Kortene er udarbejdet af GEUS i samarbejde med NIRAS og Miljøstyrelsen som led i Energistyrelsens geologiske screening for storskala havvind. Formålet med datasættet er at give et detaljeret geologisk grundlag, der kan understøtte planlægningen af havvindprojekter i Danmark. De udstillede kort viser variationer i aflejringernes tykkelse og udgør en central reference i NIRAS’ følsomhedsstudie, som vurderer havområders egnethed til etablering af vindenergi. Datasættet præsenteres gennem en dedikeret GEUS-webportal og indgår som et officielt GEUS-produkt. Portalen fungerer både som udstillingsvindue for de endelige geologiske data og som et fagligt referencepunkt i forbindelse med NIRAS’ digitale rapportering.

Tykkelsen af de kvartære aflejringer i Danmark er beregnet som forskellen mellem terræn (KMS - højdemodel 2008) og toppen af den prækvartære periode (GEUS - prækvartær højdeforhold). ENGLISH The thickness of the Quaternary deposits in Denmark is calculated as the difference between terrain (KMS - height model 2008) and the top of the pre-Quaternary (GEUS - pre-Quaternary height ratio).