# harmonica.datasets.fetch_geoid_earth¶

harmonica.datasets.fetch_geoid_earth()[source]

Fetch a global grid of the geoid height.

The geoid height is the height of the geoid above (positive) or below (negative) the ellipsoid (WGS84). The data are on a regular grid with 0.5 degree spacing, which was generated from the spherical harmonic model EIGEN-6C4 [Forste_etal2014] using the ICGEM Calculation Service. See the attrs attribute of the xarray.Dataset for information regarding the grid generation.

If the file isn’t already in your data directory, it will be downloaded automatically.

Returns

grid (xarray.Dataset) – The geoid grid (in meters). Coordinates are geodetic latitude and longitude.