Declination Calculator
Declination is calculated using the current International Geomagnetic Reference Field (IGRF) model. 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.
Dataset Citation
- Cite as: NCEI Geomagnetic Modeling Team. 2009: Declination Calculator. NOAA National Centers for Environmental Information. Accessed [date].
Dataset Identifiers
- NCEI Metadata ID: gov.noaa.ngdc.mgg.geophysical_models:Declination_Calculator
ISO 19115-2 Metadata
gov.noaa.ngdc.mgg.geophysical_models:Declination_Calculator
Distribution Formats | |
Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | NCEI Geomagnetic Modeling Team NOAA National Centers for Environmental Information geomag.models@noaa.gov |
Coverage Description | The IGRF is a global model that extends back to the begining of the 20th Century and is updated every 5 years to include a forcast model for the following 5 years using observations of the Earth's magnetic field over time to interpolate |
Time Period | 1900-01-01 to 2014-12-31 |
Spatial Reference System | urn:ogc:def:crs:EPSG::4326 |
Spatial Bounding Box Coordinates |
West: -180
East: 180
South: -90
North: 90
|
Spatial Coverage Map |
General Documentation |
Publication Dates |
|
Data Presentation Form | mapDigital |
Dataset Progress Status | Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | As needed |
Purpose | The purpose of the calculators is to deliver trusted magnetic field values - past, present, and near future - to aid the public as well as the scientific community in proper navigation, positioning, and other operational and research magnetic field scenarios. |
Use Limitations |
|
Dataset Citation |
|
Cited Authors |
|
Publishers |
|
Theme keywords |
Global Change Master Directory (GCMD) Science Keywords
|
Data Center keywords |
Global Change Master Directory (GCMD) Data Center Keywords
|
Place keywords |
Global Change Master Directory (GCMD) Location Keywords
|
Use Constraints |
|
Access Constraints |
|
Other Constraints | Cite as: NCEI Geomagnetic Modeling Team. 2009: Declination Calculator. NOAA National Centers for Environmental Information. Accessed [date]. |
Fees |
|
Lineage information for: repository | |
---|---|
Processing Steps |
|
Last Modified: 2020-05-14
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov