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EMAG2 |
EMAG2: A 2-arc min resolution Earth Magnetic Anomaly Grid compiled from satellite,
airborne, and marine magnetic measurements |
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EMAG2: Earth Magnetic Anomaly Grid (2-arc-minute resolution) |
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doi:10.7289/V5MW2F2P NCEI Metadata ID: gov.noaa.ngdc.mgg.geophysical_models:EMAG2
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Generic Mapping Tools (GMT) |
Generic Mapping Tools (GMT) |
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GCMD Data Center Keywords |
Global Change Master Directory (GCMD) Data Center Keywords |
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GCMD Location Keywords |
Global Change Master Directory (GCMD) Location Keywords |
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GCMD Science Keywords |
Global Change Master Directory (GCMD) Science Keywords |
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International DOI Foundation (IDF) |
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NOAA National Centers for Environmental Information |
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WDMAM |
National Geophysical Data Center candidate for the World Digital Magnetic Anomaly
Map |
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World Geodetic System 1984 |
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http://geomag.colorado.edu/emag2-earth-magnetic-anomaly-grid-2-arc-minute-resolution.html |
EMAG2 Home Page |
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information |
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http://geomag.colorado.edu/images/EMAG2/EMAG2.kmz |
Google Earth |
Plugin for Google Earth. Requires installation of Google Earth. |
download |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_V2.grd |
GMT Grid |
A GMT (Generic Mapping Tools) compatible netCDF grid with resolution of 2-arc-minutes.
The values (nT) are stored as 32-bit floating point. |
download |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_V2.tif |
GIS TIFF |
A georeferenced TIFF (GeoTIFF) with a resolution of 2-arc-minutes, which can be opened
by ESRI ArcGIS or any other GIS application. The values (nT) are stored as 32-bit
floating point. |
download |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_V2.xyz.gz |
XYZ/Zip |
EMAG2 ASCII grid of the magnetic total intensity at 4km above WGS84 ellipsoid. |
download |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_image_V2.jpg |
EMAG2 Full Resolution Map image |
JPG of Full Resolution Map of EMAG2 as an image. |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_image_V2.tif |
Color-relief |
A 24-bit RGB georeferenced TIFF (GeoTIFF) color-relief visualization of the EMAG2
grid, which can be opened by ArcGIS or any other GIS application. |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_no_directional_gridding_2009-01-06.xyz.gz |
XYZ/zip |
EMAG2 (Version 2.0) ASCII grid of the magnetic total intensity at 4km above WGS84
ellipsoid. This version was produced without directional gridding. Therefore, it has
much sparser coverage but reflects more closely the actual measurements. |
download |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_poster_V2.jpg |
EMAG2 Full Resolution Map poster |
JPG of Full Resolution Map of EMAG2 as a poster. |
download |
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http://geomag.colorado.edu/images/EMAG2/EMAG2_poster_V2.pdf |
EMAG2 Full Resolution Map poster |
PDF of Full Resolution Map of EMAG2 as a poster |
download |
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http://geomag.colorado.edu/images/EMAG2/emag2.pdf |
EMAG2: A 2-arc-minute resolution Earth Magnetic Anomaly Grid compiled from satellite,
airborne and marine magnetic measurements |
Preprint of manuscript "EMAG2: A 2-arc-minute resolution Earth Magnetic Anomaly Grid
compiled from satellite, airborne and marine magnetic measurements", submitted for
publication to Geochem. Geophys. Geosyst. |
download |
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http://geomag.org/info/Smaus/Doc/emag2.pdf |
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http://geomag.org/info/Smaus/Doc/wdmam.pdf |
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https://epsg.org/crs_4326/WGS-84.html |
WGS 84 |
GML of World Geodetic System 1984 coordinate reference system. |
information |
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https://epsg.org/home.html |
European Petroleum Survey Group Geodetic Parameter Registry |
Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured
dataset of Coordinate Reference Systems and Coordinate Transformations. |
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https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords |
Global Change Master Directory (GCMD) Keywords |
The information provided on this page seeks to define how the GCMD Keywords are structured,
used and accessed. It also provides information on how users can participate in the
further development of the keywords. |
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https://www.ncei.noaa.gov/contact |
NCEI Contact Information |
Information for contacts at NCEI. |
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https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.geophysical_models:EMAG2/html |
Metadata Landing Page |
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information |
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Article |
Version 2 |
Preprint of manuscript "EMAG2: A 2-arc-minute resolution Earth Magnetic Anomaly Grid
compiled from satellite, airborne and marine magnetic measurements", submitted for
publication to Geochem. Geophys. Geosyst. |
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GIS TIFF |
Version 2 |
A georeferenced TIFF (GeoTIFF) with a resolution of 2 arc-minutes, which can be opened
by ESRI ArcGIS or any other GIS application. The values (nT) are stored as 32-bit
floating point. |
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GMT Grid |
Version 2 |
A GMT (Generic Mapping Tools) compatible net CDF grid with resolution of 2-arc-minutes.
The values (nT) are stored as 32-bit floating point. |
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GeoTIFF |
Version 2 |
Color-relief: A 24-bit RGB georeferenced TIFF (GeoTIFF) color-relief visualization
of the EMAG2 grid, which can be opened by ArcGIS or any other GIS application. The
color scale legend is at http://geomag.colorado.edu/images/EMAG2_scale.png |
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Google Earth |
Version 2 |
Plugin for Google Earth. Requires installation of Google Earth. See also https://productforums.google.com/forum/?fromgroups#!msg/gec-dynamic-data-layers/yYsaTFnIzYQ/RVwprs5WhPQJ[1-25] |
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JPG |
Version 2 |
Full Resolution Map of EMAG2 as a poster |
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PDF |
Version 2 |
Full Resolution Map of EMAG2 as a poster |
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XYZ/Zip |
Version 2 |
ASCII grid of the magnetic total intensity at 4km above WGS84 ellipsoid. |
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Merged grids at 4 km altitude above geoid using Least Squares Collocation.
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From all original ship and airborne measurements: subtracted main and external fields
given by the Comprehensive Model (Sabaka et al., 2004)
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Line-leveled the trackline data, minimizing misfits from neighboring and cross-over
tracks.
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Merged the trackline data with the grid at 4 km altitude using Least Squares Collocation
with anisotropic correlation function (directional gridding).
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Substituted spherical harmonic degrees less than or equal to 120 (33 km wavelength)
with CHAMP satellite magnetic anomaly model MF6 (Maus et al., 2008).
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2015-04-22T00:00:00 |
NOAA created the National Centers for Environmental Information (NCEI) by merging
NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC),
and National Oceanographic Data Center (NODC), including the National Coastal Data
Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations
Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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