mpas_tools.mesh.creation.signed_distance.distance_from_geojson¶

mpas_tools.mesh.creation.signed_distance.distance_from_geojson(fc, lon_grd, lat_grd, earth_radius, nn_search='flann', max_length=None, shapes=None)[source]¶

Get the distance for each point on a lon/lat grid from the closest point on the boundary of the geojson regions.

Parameters

fc (geometrics_features.FeatureCollection) – The regions to be rasterized
lon_grd (numpy.ndarray) – A 1D array of longitude values
lat_grd (numpy.ndarray) – A 1D array of latitude values
earth_radius (float) – Earth radius in meters
nn_search ({‘kdtree’, ‘flann’}, optional) – The method used to find the nearest point on the shape boundary
max_length (float, optional) – The maximum distance (in degrees) between points on the boundary of the geojson region. If the boundary is too coarse, it will be subdivided.
shapes (list of shapely.geometry, optional) – A list of shapes that have already been extracted from fc and possibly subdivided

Returns

distance (numpy.ndarray) – A 2D field of distances to the shape boundary