Earth Magnetic Anomaly Grid 1:35,000,000 (2 arc-minute resolution) (EMAG2)

A global Earth Magnetic Anomaly Grid (EMAG2) was compiled from satellite, ship and airborne magnetic measurements. (Maus et al., 2009) Over the continents and the Arctic we made use of exisiting magnetic anomaly grids, whereas original ship and airborne trackline data were processed over the rest of the oceans, wherever available. CHAMP satellite magnetic measurements provided the magnetic field at wavelengths above 330 km. The EMAG2 grid is available at http://geomag.org and http://ngdc.noaa.gov . Directional gridding Due to the sparsity of magnetic field measurements in the southern oceans, it is necessary to interpolate the magnetic field between tracklines. Our interpolation algorithm takes the direction of the magnetic lineations into account. Tje lineations are parallel to the isochrons, which are perpendicular to the gradient of the age of teh oceanic crust. We use the age grid of Müller et al. (2008). The magnetic field ad a given grid point is computet by Least Squares Collocation from the surrounding measurements. If the point is on land, we use an isotropic correlation function with Rc = 14 km correlation length. Over the oceans we use Rc = 56 km parallel to the isochrons and Rc = 14 km in the spreading direction. Measurements seperated from the grid point by an age discontinuity or a topographic feature are excluded from the collation.

Identification

Data identification

Citation

Alternate title

EMAG2
Date (Publication)
2010-11-10
Edition

1. Auflage
Citation identifier
B3CCFEA1-9E87-4593-B4AB-6D441AA752C1
Author
  Barckhausen, U. et al.
Author
  Maus, S.
Status
Completed
Point of contact
  Bundesanstalt für Geowissenschaften und Rohstoffe - Barckhausen, Udo, Dr.
Stilleweg 2 , Hannover , 30655 , DE

GEMET - INSPIRE themes, version 1.0

  • Geologie

GEMET - Concepts, version 2.4

  • geophysics

  • Geophysik
Theme

  • Earth magnetic field

  • Erdmagnetfeld

  • Weltkarte

  • world map
Place

  • Weltweit

Legal constraints

Access constraints
Other restrictions
Other constraints
Es gelten keine Zugriffsbeschränkungen

Legal constraints

Use constraints
Other restrictions
Other constraints

Allgemeine Geschäftsbedingungen, s. https://www.bgr.bund.de/agb - General Terms and Conditions, s. https://www.bgr.bund.de/agb_en

Other constraints

Preis der gedruckten Karte: 13,83 EUR (zzgl. 7% MWSt. und Versandkosten) Weitere Informationen zur Bestellung beim Internationalen Landkartenhaus siehe https://www.bgr.bund.de/produktcenter-bestellhinweis-ILH

Spatial representation type
Grid
Denominator
35000000
Language
English
Character set
UTF8
Topic category
  • Geoscientific information
N
S
E
W
thumbnail


 

Distribution

Distribution

Distribution format
  • PDF ( n/a )

  • JPEG ( n/a )

  • TIFF ( n/a )

  • gedruckt ( n/a )

Digital transfer options

Transfer size
2
OnLine resource
EMAG2 (PDF)

EMAG2 im Format Adobe Acrobat Datei (geringe Auflösung)

Digital transfer options

Transfer size
12
OnLine resource
EMAG2 (JPEG)

EMAG2 im Format JPEG (Auflösung 150 dpi)

Digital transfer options

Transfer size
68
OnLine resource
EMAG2 (TIFF)

EMAG2 im Format TIFF (Auflösung 300 dpi)

OnLine resource
EMAG2 (gedruckt)

EMAG2 im Format gedruckt, gefalzt

OnLine resource
EMAG2-Projekt im Internet - EMAG2-Project-Website
 

Quality

Data quality

Scope

Hierarchy level
Dataset
Statement

Daten: NOAA, Boulder, CO, USA. Referenz: Maus, S., U. Barckhausen, et al. (2009), EMAG2: A 2-arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, and ... , Geochem. Geophys. Geosyst., 10, doi: 10.1029/2009GC002471 - Data: NOAA, Boulder, CO, USA. Reference: Maus, S., U. Barckhausen, et al. (2009), EMAG2: A 2-arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, and ... , Geochem. Geophys. Geosyst., 10, doi: 10.1029/2009GC002471
 

Ref. system

Unique resource identifier
EPSG:4326
 

Metadata

Metadata

File identifier
CF387546-B217-43D3-8781-8BEF8250253B XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Hierarchy level name

Geophysik
Date stamp
2025-02-12
Metadata standard name

INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119
Metadata standard version

n/a
Point of contact
  Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
http://www.bgr.bund.de
 
 

Overviews

overview

Spatial extent

N
S
E
W
thumbnail


Keywords

Earth magnetic field Erdmagnetfeld Weltkarte world map
GEMET - Concepts, version 2.4
Geophysik geophysics
GEMET - INSPIRE themes, version 1.0
Geologie

Provided by

Access to the portal

Associated resources

Not available