mpas_tools.viz.transects.subdivide_great_circle¶

mpas_tools.viz.transects.subdivide_great_circle(x, y, z, maxRes, earthRadius)[source]¶

Subdivide each segment of the transect so the horizontal resolution approximately matches the requested resolution

Uses a formula for interpolating unit vectors on the sphere from https://en.wikipedia.org/wiki/Slerp

Parameters

x, y, z (numpy.array) – The Cartesian coordinates of a transect, where the number of segments is len(x) - 1. x, y and z are of the same length.
maxRes (float) – The maximum allowed spacing in m after subdivision
earthRadius (float) – The radius of the Earth in m

Returns

xOut, yOut, zOut (numpy.array) – The transect subdivided into segments with segment length at most maxRes. All the points in x, y and z are guaranteed to be included.
dIn (numpy.array) – The distance along the transect before subdivision
dOut (numpy.array) – The distance along the transect after subdivision