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  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.
 
Citation proposal
(2010) . Earth Magnetic Anomaly Grid 1:35,000,000 (2 arc-minute resolution) (EMAG2). https://gdk.gdi-de.org/geonetwork/srv/api/records/CF387546-B217-43D3-8781-8BEF8250253B
 
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INSPIRE

Identification

File identifier
CF387546-B217-43D3-8781-8BEF8250253B   XML
Hierarchy level
dataset Dataset
Online resource
Resource identifier
code
B3CCFEA1-9E87-4593-B4AB-6D441AA752C1
Metadata language
eng English
Spatial representation type
Grid
Encoding
Format
PDF
Version
n/a
Format
JPEG
Version
n/a
Format
TIFF
Version
n/a
Format
gedruckt
Version
n/a
Projection
 

Classification of data and services

Topic category
  • Geoscientific information
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Keywords

GEMET - INSPIRE themes, version 1.0 ( Theme )
  • Geologie
GEMET - Concepts, version 2.4 ( Theme )
  • geophysics
  • Geophysik
Other keywords
Keywords ( Theme )
  • Earth magnetic field
  • Erdmagnetfeld
  • Weltkarte
  • world map
Keywords ( Place )
  • Weltweit
 
 

Geographic coverage

N
S
E
W


 

Temporal reference

Temporal extent
Temporal extent
Date ( Publication )
2010-11-10
 

Quality and validity

Lineage
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
Denominator
35000000
 

Conformity

Conformity
Conformity
 

Conformity

Conformity
Conformity
 

Restrictions on access and use

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

Restrictions on access and use

 

Responsible organization (s)

Contact for the resource
Organisation name
Bundesanstalt für Geowissenschaften und Rohstoffe
Email
Udo.Barckhausen@bgr.de
 

Responsible organization (s)

Contact for the resource
Organisation name
Bundesanstalt für Geowissenschaften und Rohstoffe
Email
Udo.Barckhausen@bgr.de
 

Metadata information

Contact for the metadata
Organisation name
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
Email
geodatenmanagement@bgr.de
Date stamp
2025-02-12
Metadata language
English
Character set
utf8 UTF8
 
 

SDS

Conformance class 1: invocable

Access Point URL
Endpoint URL
Technical specification
 

Conformance class 2: interoperable

Coordinate reference system
 
Quality of Service
 
Access constraints
Limitation
 
Use constraints
Limitation
 
Responsible custodian
Contact for the resource
 
 

Conformance class 3: harmonized

 
 

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CF387546-B217-43D3-8781-8BEF8250253B   Access to the portal Read here the full details and access to the data.

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