ISO Table View View Metadata As: Get Data, FAQ, HTML, 19139 XML
Assess Metadata For: Completeness, DOI Readiness, CSW Readiness, Components

Metadata Identifier: gov.noaa.ngdc.mgg.geophysical_models:US_Historic_Declination_Calculator

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 US Historic Declination Calculator This programs derives a table of secular change in magnetic declination for a specified point in the conterminous United States. It utilizes the USD polynomial and the IGRF spherical harmonic models. Declination is calculated using the current World Magnetic Model (WMM) or International Geomagnetic Reference Field (IGRF) model. While results are typically accurate to 30 minutes of arc, users should be aware that several environmental factors can cause disturbances in the magnetic field.
Top

SV_Identification

none found
Top

CI_Citation

Count Component Title Date Citation Identifier
1
  • 2000-03-15
1 IGRF11 Spherical Harmonic Model.
  • 2010-10-12
1 International Geomagnetic Reference Field 11
  • 2010-10-12
1 GCMD Data Center Keywords NASA/GCMD Data Center Keywords
    1 GCMD Location Keywords NASA/GCMD Location Keywords
      1 GCMD Science Keywords NASA/GCMD Science Keywords
        1 Polynomial US Historic Declination Calculator and the IGRF - Eleventh Generation
        • 2009-12-01
        1 US Historic Declination Calculator
        • 2009-12-01
        1 World Geodetic System 1984
        • 2007-08-27
        Top

        CI_Series

        none found
        Top

        CI_ResponsibleParty

        Count Component Individual Organization Position Email Role Linkage
        1 resourceProvider http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4326
        3 GCMD Valids custodian http://gcmd.nasa.gov/learn/keyword_list.html
        1 http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
        1 publisher http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
        1 Brian Meyer Brian Meyer DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Brian.Meyer@noaa.gov pointOfContact
        4 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce distributor http://www.ngdc.noaa.gov/geomag-web/#ushistoric
        1 EPSG Registry European Petroleum Survey Group publisher http://www.epsg-registry.org/
        1 International Association of Geomagnetism and Aeronomy (IAGA) resourceProvider http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
        3 GCMD User Support Office NASA GCMD User Support Office gcmduso@gcmd.gsfc.nasa.gov custodian http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso
        3 NGDC Geomagnetic Modelling Team NGDC Geomagnetic Modeling Team DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce geomag.models@noaa.gov pointOfContact http://www.ngdc.noaa.gov/geomag/
        Top

        CI_OnlineResource

        Count Component Linkage Name Description Function
        3 http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso GCMD Feedback Form Have a Comment for the GCMD? information
        3 GCMD Keyword Page http://gcmd.nasa.gov/learn/keyword_list.html GCMD Keywords Page This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions. information
        1 http://www.epsg-registry.org/ 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. search
        1 http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4326 WGS 84 GML of World Geodetic System 1984 coordinate reference system. information
        3 http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
        4 http://www.ngdc.noaa.gov/geomag-web/#ushistoric
        3 http://www.ngdc.noaa.gov/geomag/
        Top

        MD_Identifier or RS_Identifier

        Count Component Code
        1 Processing steps were carried out collectively by the developers of the model. These developers are listed as authors of the associated paper "International Geomagnetic Reference Field: the eleventh generation".
        1 The US Historic Declination Polynomial model was merged with the IGRF11 to create a smooth transition from the historic observations (pre 1900) to the more current models and observations (those made after 1900).
        1 urn:ogc:def:crs:EPSG::4326
        Top

        EX_Extent

        Bounding Box Temporal Extent
        Count Component Description West East North South Start End
        1 -180 180 90 -90 1750-01-01 2014-12-31
        Top

        EX_GeographicBoundingBox

        Count Component West East North South
        1 -180 180 90 -90
        Top

        EX_TemporalExtent

        Count Component Start End
        1 1750-01-01 2014-12-31
        Top

        MD_Format

        Count Component Name Version specification
        1 CSV Format 1 The Declination Calculator creates an Comma Seperated Variable (CSV) file which reports the location and date queried as well as the declination and the annual change in declination in decimal minutes per year.
        1 HTML Format 1 The Declination Calculator creates an HTML pop-up window which superimposes a compass rose, indicating the declination, onto the location queried and reports the annual change in declination.
        1 XML Format 1 The Declination Calculator creates an XML file which reports the location and date queried as well as the declination and the annual change in declination in decimal minutes per year.
        Top

        MD_Medium

        none found
        Top

        MD_Constraints

        Count Component Use Limitation
        1 NOAA Disclaimer While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
        1 NGDC Copyright Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
        Top

        MD_ReferenceSystem

        Count Component Code Authority Title
        1 WGS 84 urn:ogc:def:crs:EPSG::4326 World Geodetic System 1984
        Top

        MD_GridSpatialRepresentation

        Count Component Number of Dimensions Cell Geometry Code
        1 3 point
        Top

        MD_Georeferenceable or MI_Georeferenceable

        none found
        Top

        MD_Georectified or MI_Georectified

        none found
        Top

        MD_Dimension

        none found
        Top

        MD_CoverageDescription or MI_CoverageDescription

        Count Component Attribute Description Content Type
        1 Individual Value
        Top

        MD_Band or MI_Band

        Count Component Identifier Descriptor
        1 Declination
        Top

        MI_RangeElementDescription

        none found
        Top

        MD_AggregateInformation

        none found
        Top

        LE_Source or LI_Source

        Count Component Title Date Description
        1 2000-03-15 USD was developed largely based on a ground-network of US repeat stations whose density and coveraged changed as the US settlements moved westward. The USD polynomial intentionally has as much "wiggle" in the declination lines as was possible to model to provide the most accurate model of declination for survey use.
        1 IGRF 11 International Geomagnetic Reference Field 11 2010-10-12 The IGRF is the product of a collaborative effort between magnetic field modellers and the institutes involved in collecting and disseminating magnetic field data from satellites and from observatories and surveys around the world. The IGRF is a series of mathematical models of the Earth's main field and its annual rate of change (secular variation).
        Top

        LE_ProcessStep or LI_ProcessStep

        Count Component DateTime Description
        1 User input of area of interest and time for desired data grid into a web interface.
        1 User data is sent via HTTP request to a java servelet hosted on a local NGDC server. This checks that all of the necessary information to run the model executable correctly is present and in the correct format.
        1 NGDC server accesses a C executable, in this case the IGRF executable, and inputs the user data and runs the executable to obtain desired output parameters in XML format.
        1 The XML created by the executable is sent back to NGDC server and input into the Java servelet which reformats the output into the format designated by the user at the begining of the process. This reformatted information is returned to the User's webpage.
        1 NGDC server accesses a C executable, inputs the user data and runs the executable to obtain desired output parameters.
        Top

        MI_Operation

        none found
        Top

        MI_Platform

        none found
        Top

        MI_Instrument

        none found
        Top