Dybden til redoxgrænsen, 100 m grid

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.

Simple

Date ( Publication )
2019-01-01
Identifier
dk.geus / dk_redox_depth_100m
Presentation form
Digital map
Purpose
The purpose of the dataset is to support national and regional groundwater mapping and assessments of nitrate reduction, groundwater quality, and vulnerability. The map is suitable for use in water management, environmental planning, research, and modelling where knowledge of subsurface redox conditions is required.
Status
Completed
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - Julian Koch ( )
Maintenance and update frequency
As needed
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - GIS-support
Keywords ( Theme )
  • Dataset
  • Geology
  • Redox interface
  • Groundwater
  • Hydrogeology
  • Nitrate reduction
  • Denmark
  • ArcGIS
Forskningsemner Forskningsemner ( Theme )
Geografisk Geografisk ( Place )
Access constraints
Other restrictions
Use constraints
Other restrictions
Other constraints
CC BY-NC-SA 4.0
Spatial representation type
Grid
Denominator
250000
Metadata language
Da
Character set
UTF8
Topic category
  • Geoscientific information
  • Environment
Begin date
2013-01-01
End date
2018-12-31
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Supplemental Information
The dataset replaces an earlier national redox map with a spatial resolution of 1 km × 1 km and represents a substantial improvement in both spatial detail and methodological approach. The map is not subject to continuous updates and should be used in conjunction with local data and expert judgement for detailed investigations.
Reference system identifier
ETRS 89 / UTM 32N (EPSG:25832)
Distribution format
  • WMS ( )

  • WMTS ( )

  • REST ( )

Distributor
  The Geological Survey of Denmark and Greenland (GEUS) - GIS-support
OnLine resource
Download ( WWW:DOWNLOAD-1.0-http--download )

Download dataset from GEUS' Dataverse

OnLine resource
Interactive webmap ( WWW:LINK-1.0-http--link )

Interactive map displaying the dataset.

OnLine resource
New national redox map at high resolution ( WWW:LINK-1.0-http--link )

Professional article presenting the new national high-resolution redox map and explaining the background, methodology, and potential applications related to groundwater and nitrate reduction.

OnLine resource
GEUS releases new national redox map ( WWW:LINK-1.0-http--link )

GEUS news article (15-03-2019) introducing the national high-resolution redox map and describing its application in groundwater mapping and environmental management.

OnLine resource
National redox map, 1 km × 1 km ( WWW:LINK-1.0-http--link )

Report documenting the previous national redox map with a spatial resolution of 1 km × 1 km, providing a basis for comparison with the newer high-resolution redox map.

OnLine resource
Redox_dybde_100m_grid ( ESRI:REST )

ArcGIS REST Service

OnLine resource
Redoxgraensen ( OGC:WMS-1.3.0-http-get-capabilities )

ArcGIS WMS Service

OnLine resource
Denmark_Redox_dybde_100m_grid ( OGC:WMTS-1.0.0-http-get-capabilities )

ArcGIS WMTS Service

Hierarchy level
Dataset
Statement
The map is based on approximately 13.000 observations of redox conditions identified as colour changes in sediment samples from boreholes. Based on these observations, a statistical model describing the relationship between depth to the redox interface and a range of explanatory variables was developed. The model was constructed using the machine learning method Random Forest and implemented on a nationwide grid with a spatial resolution of 100 metres. To quantify uncertainty in the estimated depths, residual Gaussian simulation was applied, allowing assessment of spatial variability and model uncertainty. The methodology and model development are documented in the scientific literature.
File identifier
b931207c-d386-493a-b5e4-073adb43297c XML
Metadata language
Danskda
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2026-03-19T15:09:19.047731Z
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - GIS-support ( )
 
 

Overviews

overview

Spatial extent

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Keywords

ArcGIS Dataset Denmark Geology Groundwater Hydrogeology Nitrate reduction Redox interface
Forskningsemner
Hydrology Quaternary geology Soils and biogeochemistry

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Associated resources

Not available