This dataset comprises a multidirectional hillshade raster derived from the Greenland Mapping Project (GIMP) Digital Elevation Model. The hillshade was produced to serve as a semi-transparent overlay for cartographic applications, enhancing terrain depth and surface detail while preserving the original colour characteristics of underlying map layers. The multidirectional illumination method reveals terrain variation from multiple light directions, providing improved representation of landforms compared to traditional single-direction hillshading. The dataset is intended for visualisation purposes in web maps and other cartographic products.

The dataset represents an index layer showing the geographic extent of archived and unpublished historical geological maps and sections from Greenland. The layer functions as a search and reference tool and does not contain the original map material. The dataset supports identification and access to historical geological archive documents.

This repository contains three national nitrogen retention maps for Denmark and associated uncertainties. “TotalRetention_regioner.tif” is the total retention (nitrogen removal) from the source location to the coast, “Grundvandsretention_regioner.tif” is the retention during transport in the groundwater and “Overfladevandsretention.tif” is the retention in the surface water system, i.e. streams, lakes, wetlands and inundated areas. The maps for the total and groundwater retention are aggregated from a 100 m grid into regions with a minimum size of 50 ha based on similarity between neighbouring grids. For surface water, the spatial resolution is defined as the contribution catchment discharging to the individual retention environments, e.g. a lake catchment. The total retention is supplemented by two maps “TotalRetention_usikkerhed_regioner.tif” showing the uncertainty in the total retention estimated for each region and “TotalRetention_standardafvigelse_regioner.tif” displaying the standard deviation between the individual grids within each region. All maps are calculated using data for the period 2000 – 2021. The nitrogen retention maps have been developed in a collaboration between GEUS and Aarhus University. (2025-08-29).

The service contains GEBCO, VMAP0 data at higher zoom levels, and data from the national mapping authorities of Canada, Denmark, Finland, Iceland, Norway, Russia, Sweden and USA. The service has been designed for use within the ArcticSDI Geoportal.

Indigenous peoples of the Arctic countries subdivision according to language families. This service is internal and only used in the Arctic-SDI geoportal: https://geoportal.arctic-sdi.org/

The map service shows submarine landforms related to landslides on the seabed as well as natural phenomena that can cause instability in the seabed and thus pose a danger to underwater installations and/or exposed coastal areas.