pysteps error when installed cartopy #201
Description
1、warning message when execute “python .\plot_extrapolation_nowcast.py” without cartopy
<class 'pysteps.exceptions.MissingOptionalDependency'>: the cartopy package is required to plot the geographical map but it is not installed
2、installed cartopy
3、pysteps errors：
(floods) PS E:\pysteps_data\pysteps_data> python .\plot_extrapolation_nowcast.py Traceback (most recent call last): File ".\plot_extrapolation_nowcast.py", line 15, in <module> from pysteps import io, motion, nowcasts, rcparams, verification File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\pysteps\__init__.py", line 25, in <module> from . import visualization as plt File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\pysteps\visualization\__init__.py", line 4, in <module> from .motionfields import * File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\pysteps\visualization\motionfields.py", line 19, in <module> from . import basemaps File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\pysteps\visualization\basemaps.py", line 22, in <module> import cartopy.crs as ccrs File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\cartopy\__init__.py", line 96, in <module> import cartopy.crs File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\cartopy\crs.py", line 2418, in <module> Sinusoidal.MODIS = Sinusoidal(globe=Globe(ellipse=None, File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\cartopy\crs.py", line 2392, in __init__ self._boundary = sgeom.LinearRing(points) File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\shapely\geometry\polygon.py", line 55, in __init__ self._set_coords(coordinates) File "d:\ProgramData\Anaconda3\envs\floods\lib\site-packages\shapely\geometry\polygon.py", line 70, in _set_coords ret = geos_linearring_from_py(coordinates) File "shapely\speedups\_speedups.pyx", line 408, in shapely.speedups._speedups.geos_linearring_from_py ValueError: GEOSGeom_createLinearRing_r returned a NULL pointer