my_code_base.plot.z_overlap

Module Contents

my_code_base.plot.z_overlap.fix_overlap(da, ax)

Fix overlapping geographic dimensions. This avoids artifacts when plotting contour lines of geographic data on a stereographic map projection.

Calls z_masked_overlap() to perform the data transformation.

Parameters:

• da – An xarray.DataArray object with dimensions to be transformed.

• ax – A cartopy.mpl.geoaxes.GeoAxes object with stereographic projection.

my_code_base.plot.z_overlap.z_masked_overlap(axe, X, Y, Z, source_projection=None)

Warning

Normally, one should avoid calling this function. Instead, use fix_overlap() to fix the overlap.

This function performs the actual transformation of the data for the fix_overlap() function.

It follows the solutions provided in the following issues:

• https://github.com/SciTools/cartopy/issues/1225

• https://github.com/SciTools/cartopy/issues/1421

The function finds and masks the overlaps in the data that are more than half the range of the projection of the axes.

Parameters:

• axe (cartopy.mpl.geoaxes.GeoAxes) – The axes object with the projection.

• X (array_like) – The coordinates in the projection of the axes or the longitudes and latitudes.

• Y (array_like) – The coordinates in the projection of the axes or the longitudes and latitudes.

• Z (array_like) – The data to be transformed.

• source_projection (cartopy.crs.CRS, optional) – If provided and is a geodetic CRS, the data is in geodetic coordinates and should first be projected in the projection of the axes.

X and Y are 2D arrays with the same dimensions as Z for contour and contourf operations. They can also have an extra row and column for pcolor and pcolormesh operations.

Returns:

ptx, pty, Z – The transformed coordinates and data.

Return type:

list(numpy.ndarray)