polartoolkit.fetch.magnetics

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polartoolkit.fetch.magnetics#

magnetics(version, region=None, spacing=None, registration=None, hemisphere=None, epsg=None, **kwargs)[source]#

Load magnetic anomaly data for the Arctic and Antarctic. from Golynsky et al.[1] and Golynsky et al.[2].

version=’admap1’ ADMAP-2001 magnetic anomaly compilation of Antarctica. Accessed from http://admap.kopri.re.kr/databases.html

version=’admap2’ ADMAP2 magnetic anomaly compilation of Antarctica from Golynsky et al.[3]. Accessed from https://doi.pangaea.de/10.1594/PANGAEA.892723?format=html#download

version=’admap2_gdb’ Geosoft-specific .gdb abridged files Golynsky et al.[4]. Accessed from https://doi.pangaea.de/10.1594/PANGAEA.892722?format=html#download

version=’LCS-1’ Satellite-only derived magnetic anomaly at Earth’s surface (WGS84 ellipsoid) for spherical harmonic degrees n=14-185 Accessed from https://www.spacecenter.dk/files/magnetic-models/LCS-1/

Parameters:

  • version (str) – Either ‘admap1’, ‘admap2’, ‘admap2_gdb’ or ‘LCS-1’.

  • region (tuple[float, float, float, float], optional) – region to clip the loaded grid to, in format [xmin, xmax, ymin, ymax], by default doesn’t clip

  • spacing (str or int, optional) – grid spacing to resample the loaded grid to, by default 10e3

  • registration (str, optional,) – choose between ‘g’ (gridline) or ‘p’ (pixel) registration types, by default is the original type of the grid

  • hemisphere (str, optional) – choose which hemisphere to retrieve data for, “north” or “south”, by default None

  • epsg (str | None) – choose which region to retrieve data for, either “3031” or “3413”, by default None

  • kwargs (Any) – key word arguments to pass to resample_grid.

Returns:

Returns a loaded, and optional clip/resampled grid of magnetic anomalies.

Return type:

xarray.DataArray

References

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