ASTER band ratio data for Northeast Greenland

The dataset consists of a series of ASTER band ratios combined into colour composite images designed to highlight mineralogical distributions and lithological variability in Northeast Greenland. The ASTER scenes were preprocessed with atmospheric, radiometric and topographic corrections, including radiative transfer modelling using ATCOR-3 in rugged terrain mode. A surface elevation model was applied to adjust illumination effects. Non-outcrop pixels were masked prior to generating the final mosaic. Calibrated radiance data were converted to apparent surface reflectance; however, further calibration against ground-based reflectance measurements was not feasible. The dataset represents a derived remote sensing product and not primary satellite data.

Simple

Date ( Publication )
2019-05-02
Identifier
dk.geus / grl_northeast_greenland_aster_band_ratios
Presentation form
Digital map
Purpose
The purpose of the dataset is to support regional mineral exploration and geological mapping by enhancing spectral variations related to mineralogy and lithology in Northeast Greenland.
Status
Completed
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - Sara Salehi
Distributor
  The Geological Survey of Denmark and Greenland (GEUS) - Christian Brogaard Pedersen
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - Símun Dalsenni Olsen
Maintenance and update frequency
As needed
Point of contact
  The Geological Survey of Denmark and Greenland (GEUS) - GIS-support
Keywords ( Theme )
  • Dataset
  • ASTER
  • Remote sensing
  • Band ratios
  • Mineral exploration
  • Northeast Greenland
Forskningsemner Forskningsemner ( Theme )
Geografisk Geografisk ( Place )
Access constraints
Other restrictions
Use constraints
Other restrictions
Other constraints
CC BY 4.0
Other constraints
The dataset is a derived product based on ASTER satellite data. It was developed for regional mineralogical analysis and should not be interpreted as fully radiometrically calibrated surface reflectance data. Use must consider the methodological limitations described in the accompanying report.
Spatial representation type
Grid
Denominator
1000000
Metadata language
en
Character set
UTF8
Topic category
  • Geoscientific information
Begin date
2000-01-01
End date
2007-12-31
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Supplemental Information

The methodological background, including band ratio selection, data coverage and processing parameters, is described in GEUS Report 2019/7.

The original ASTER Level 1T data can be accessed via the USGS EarthExplorer portal (https://earthexplorer.usgs.gov/).
Reference system identifier
WGS 84 / UTM 24N (EPSG:32624)
Distribution format
  • WMS ( )

  • REST ( )

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

USGS Earth Explorer download page

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

Interactive map displaying the dataset.

OnLine resource
ASTER data analysis applied to mineral and geological mapping in North East Greenland. Documentation of the NEG ASTER Project ( DOI )

Salehi, S., Olsen, S. D., Pedersen, C. B., & Thorning, L. (2019). ASTER data analysis applied to mineral and geological mapping in North East Greenland. Documentation of the NEG ASTER Project. GEUS. Danmarks og Grønlands Geologiske Undersøgelse Rapport Vol. 2019 No. 7 https://doi.org/10.22008/gpub/32607

OnLine resource
neg_aster_data_grl ( ESRI:REST )

ArcGIS REST Service

OnLine resource
AST_L1T_Carbonate_chlorite_epidote ( OGC:WMS-1.3.0-http-get-capabilities )

ArcGIS WMS Service

Hierarchy level
Dataset
Statement

The dataset is based on ASTER satellite data that were preprocessed using atmospheric, radiometric and topographic corrections. The corrections were performed using ATCOR-3 in rugged terrain mode, applying a digital elevation model to adjust illumination conditions in rugged terrain. The corrected radiance data were converted to apparent surface reflectance. Further calibration against ground-based reflectance measurements was not feasible due to the lack of field data. After correction, non-outcrop pixels were masked and individual scenes were mosaicked. The dataset consists of derived band ratio products and is not identical to the original ASTER Level-1 data.

The source data consist of ASTER Level 1 Precision Terrain Corrected Registered At-Sensor Radiance (AST_L1T) scenes obtained from the USGS EarthExplorer portal. The scenes cover the period 2000–2007 and were limited to summer acquisitions captured during daytime.
File identifier
53661d2a-6cd7-4f72-82d7-a01db028bf04 XML
Metadata language
Danskda
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2026-02-27T10:22:48.851467Z
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

ASTER Band ratios Dataset Mineral exploration Northeast Greenland Remote sensing
Forskningsemner
Computational geoscience, informatics and remote sensing Economic geology

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Associated resources

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