Problem with cartopy NaturalEarthFeature bathymetry feature

cartopy_bathymetry.py

import numpy as np
import matplotlib.pyplot as plt
import cartopy.feature as cfeature
import cartopy.crs as ccrs
from cartopy.mpl.ticker import LongitudeFormatter, LatitudeFormatter

fig = plt.figure(figsize=(10, 4), dpi=300)
ax = fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree(), aspect='equal')
ax.set_extent([-80, 10, 35, 80], crs=ccrs.PlateCarree())

# ticks
ax.set_xticks(np.arange(-80, 20, 20), crs=ccrs.PlateCarree())
ax.set_yticks(np.arange(40, 100, 20), crs=ccrs.PlateCarree())
ax.xaxis.set_major_formatter(LongitudeFormatter())
ax.yaxis.set_major_formatter(LatitudeFormatter())

# add land and coastline and 1000m bathymetry line
ax.add_feature(cfeature.LAND, facecolor='grey', zorder=1)
ax.add_feature(cfeature.COASTLINE, linewidth=0.25, zorder=1)
bathym = cfeature.NaturalEarthFeature(name='bathymetry_J_1000', scale='10m', category='physical')
ax.add_feature(bathym, facecolor='none', edgecolor='black')

I got help on Github.

Here is an updated code.

import numpy as np
import matplotlib.pyplot as plt
import cartopy.feature as cfeature
import cartopy.crs as ccrs
from cartopy.mpl.ticker import LongitudeFormatter, LatitudeFormatter
from shapely.ops import cascaded_union

fig = plt.figure(figsize=(10, 4), dpi=300)
ax = fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree(), aspect='equal')
ax.set_extent([-100, 10, 0, 90], crs=ccrs.PlateCarree())

# ticks
ax.set_xticks(np.arange(-90, 30, 30), crs=ccrs.PlateCarree())
ax.set_yticks(np.arange(40, 100, 20), crs=ccrs.PlateCarree())
ax.xaxis.set_major_formatter(LongitudeFormatter())
ax.yaxis.set_major_formatter(LatitudeFormatter())

# add land and coastline and 1000m bathymetry line
ax.add_feature(cfeature.LAND, facecolor='grey', zorder=1)
ax.add_feature(cfeature.COASTLINE, linewidth=0.25, zorder=1)
bathym = cfeature.NaturalEarthFeature(name='bathymetry_J_1000', scale='10m', category='physical')
bathym = cascaded_union(list(bathym.geometries()))
ax.add_geometries(bathym, facecolor='none', edgecolor='black', linestyle='dashed', linewidth=1, crs=ccrs.PlateCarree())