my_code_base.plot.z_overlap¶

Functions¶

Module Contents¶

my_code_base.plot.z_overlap.fix_overlap(da, ax)[source]¶

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)[source]¶

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)