false masking of edge points (pcolormesh) #1845
Description
Description
A pcolormesh of an array that contains NaN at the edge can mask (i.e. plot in white) some additional grid cells.
Code to reproduce
import matplotlib
import cartopy
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
import numpy as np
print(matplotlib.__version__)
print(cartopy.__version__)
lon = np.arange(-180, 180, 30)
lat = np.arange(75, -76, -30)
# lat = np.arange(90, -91, -30)
ones = np.ones(shape=lat.shape + lon.shape) * 1.0
f, axs = plt.subplots(
1, 2, subplot_kw=dict(projection=ccrs.PlateCarree(central_longitude=15))
)
ax = axs[0]
ax.pcolormesh(lon, lat, ones, transform=ccrs.PlateCarree(), ec="0.3", lw=0.5)
ax = axs[1]
ones[0, :] = np.nan
ax.pcolormesh(lon, lat, ones, transform=ccrs.PlateCarree(), ec="0.3", lw=0.5)
for ax in axs:
ax.coastlines()
ax.set_global()
You can play with the location of the NaNs - somtimes it works fine. Sometimes it leads to strange patterns. You can also uncomment the other lat coordinates and the pattern becomes even stranger.
Full environment definition
Operating system
Cartopy version
matplotlib: 3.4.3
cartopy: 0.19.0.post1
conda list
# packages in environment at /home/mathause/conda/envs/regionmask-docs:
#
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 1_gnu conda-forge
affine 2.3.0 py_0 conda-forge
aiohttp 3.7.4.post0 py39h3811e60_0 conda-forge
alabaster 0.7.12 py_0 conda-forge
alsa-lib 1.2.3 h516909a_0 conda-forge
appdirs 1.4.4 pyh9f0ad1d_0 conda-forge
argon2-cffi 20.1.0 py39h3811e60_2 conda-forge
async-timeout 3.0.1 py_1000 conda-forge
async_generator 1.10 py_0 conda-forge
attrs 21.2.0 pyhd8ed1ab_0 conda-forge
babel 2.9.1 pyh44b312d_0 conda-forge
backcall 0.2.0 pyh9f0ad1d_0 conda-forge
backports 1.0 py_2 conda-forge
backports.functools_lru_cache 1.6.4 pyhd8ed1ab_0 conda-forge
black 21.8b0 pyhd8ed1ab_0 conda-forge
bleach 4.1.0 pyhd8ed1ab_0 conda-forge
bokeh 2.3.3 py39hf3d152e_0 conda-forge
boost-cpp 1.74.0 hc6e9bd1_3 conda-forge
brotlipy 0.7.0 py39h3811e60_1001 conda-forge
bzip2 1.0.8 h7f98852_4 conda-forge
c-ares 1.17.2 h7f98852_0 conda-forge
ca-certificates 2021.5.30 ha878542_0 conda-forge
cairo 1.16.0 h6cf1ce9_1008 conda-forge
cartopy 0.19.0.post1 py39h3b23250_1 conda-forge
certifi 2021.5.30 py39hf3d152e_0 conda-forge
cffi 1.14.6 py39he32792d_0 conda-forge
cfitsio 3.470 hb418390_7 conda-forge
cftime 1.5.0 py39hce5d2b2_0 conda-forge
chardet 4.0.0 py39hf3d152e_1 conda-forge
charset-normalizer 2.0.0 pyhd8ed1ab_0 conda-forge
click 7.1.2 pyh9f0ad1d_0 conda-forge
click-plugins 1.1.1 py_0 conda-forge
cligj 0.7.2 pyhd8ed1ab_0 conda-forge
cloudpickle 1.6.0 py_0 conda-forge
colorama 0.4.4 pyh9f0ad1d_0 conda-forge
cryptography 3.4.7 py39hbca0aa6_0 conda-forge
curl 7.78.0 hea6ffbf_0 conda-forge
cycler 0.10.0 py_2 conda-forge
cytoolz 0.11.0 py39h3811e60_3 conda-forge
dask 2021.9.0 pyhd8ed1ab_0 conda-forge
dask-core 2021.9.0 pyhd8ed1ab_0 conda-forge
dataclasses 0.8 pyhc8e2a94_3 conda-forge
dbus 1.13.6 h48d8840_2 conda-forge
debugpy 1.4.1 py39he80948d_0 conda-forge
decorator 4.4.2 py_0 conda-forge
defusedxml 0.7.1 pyhd8ed1ab_0 conda-forge
distributed 2021.9.0 py39hf3d152e_0 conda-forge
docutils 0.16 py39hf3d152e_3 conda-forge
entrypoints 0.3 py39hde42818_1002 conda-forge
expat 2.4.1 h9c3ff4c_0 conda-forge
fiona 1.8.18 py39h494ca2c_1 conda-forge
fontconfig 2.13.1 hba837de_1005 conda-forge
freetype 2.10.4 h0708190_1 conda-forge
freexl 1.0.6 h7f98852_0 conda-forge
fsspec 0.8.7 pyhd8ed1ab_0 conda-forge
gdal 3.2.1 py39h409cc32_7 conda-forge
geopandas 0.9.0 pyhd8ed1ab_1 conda-forge
geopandas-base 0.9.0 pyhd8ed1ab_1 conda-forge
geos 3.9.1 h9c3ff4c_2 conda-forge
geotiff 1.6.0 h2b14fbe_4 conda-forge
gettext 0.19.8.1 h0b5b191_1005 conda-forge
giflib 5.2.1 h36c2ea0_2 conda-forge
glib 2.68.4 h9c3ff4c_0 conda-forge
glib-tools 2.68.4 h9c3ff4c_0 conda-forge
gst-plugins-base 1.18.4 hf529b03_2 conda-forge
gstreamer 1.18.4 h76c114f_2 conda-forge
hdf4 4.2.15 h10796ff_3 conda-forge
hdf5 1.10.6 nompi_h6a2412b_1114 conda-forge
heapdict 1.0.1 py_0 conda-forge
icu 68.1 h58526e2_0 conda-forge
idna 3.1 pyhd3deb0d_0 conda-forge
imagesize 1.2.0 py_0 conda-forge
importlib-metadata 4.8.1 py39hf3d152e_0 conda-forge
intake 0.6.3 pyhd8ed1ab_0 conda-forge
intake-geopandas 0.3.0 pypi_0 pypi
ipykernel 6.3.1 py39hef51801_0 conda-forge
ipython 7.27.0 py39hef51801_0 conda-forge
ipython_genutils 0.2.0 py_1 conda-forge
ipywidgets 7.6.4 pyhd8ed1ab_0 conda-forge
jedi 0.18.0 py39hf3d152e_2 conda-forge
jinja2 3.0.1 pyhd8ed1ab_0 conda-forge
joblib 1.0.1 pyhd8ed1ab_0 conda-forge
jpeg 9d h36c2ea0_0 conda-forge
json-c 0.15 h98cffda_0 conda-forge
jsonschema 3.2.0 pyhd8ed1ab_3 conda-forge
jupyter 1.0.0 py39hf3d152e_6 conda-forge
jupyter_client 7.0.2 pyhd8ed1ab_0 conda-forge
jupyter_console 6.4.0 pyhd8ed1ab_0 conda-forge
jupyter_core 4.7.1 py39hf3d152e_0 conda-forge
jupyterlab_pygments 0.1.2 pyh9f0ad1d_0 conda-forge
jupyterlab_widgets 1.0.1 pyhd8ed1ab_0 conda-forge
kealib 1.4.14 hcc255d8_2 conda-forge
kiwisolver 1.3.2 py39h1a9c180_0 conda-forge
krb5 1.19.2 hcc1bbae_0 conda-forge
lcms2 2.12 hddcbb42_0 conda-forge
ld_impl_linux-64 2.36.1 hea4e1c9_2 conda-forge
libblas 3.9.0 11_linux64_openblas conda-forge
libcblas 3.9.0 11_linux64_openblas conda-forge
libclang 11.1.0 default_ha53f305_1 conda-forge
libcurl 7.78.0 h2574ce0_0 conda-forge
libdap4 3.20.6 hd7c4107_2 conda-forge
libedit 3.1.20191231 he28a2e2_2 conda-forge
libev 4.33 h516909a_1 conda-forge
libevent 2.1.10 hcdb4288_3 conda-forge
libffi 3.3 h58526e2_2 conda-forge
libgcc-ng 11.1.0 hc902ee8_8 conda-forge
libgdal 3.2.1 h38ff51b_7 conda-forge
libgfortran-ng 11.1.0 h69a702a_8 conda-forge
libgfortran5 11.1.0 h6c583b3_8 conda-forge
libglib 2.68.4 h3e27bee_0 conda-forge
libgomp 11.1.0 hc902ee8_8 conda-forge
libiconv 1.16 h516909a_0 conda-forge
libkml 1.3.0 h238a007_1014 conda-forge
liblapack 3.9.0 11_linux64_openblas conda-forge
libllvm11 11.1.0 hf817b99_2 conda-forge
libnetcdf 4.7.4 nompi_h56d31a8_107 conda-forge
libnghttp2 1.43.0 h812cca2_0 conda-forge
libogg 1.3.4 h7f98852_1 conda-forge
libopenblas 0.3.17 pthreads_h8fe5266_1 conda-forge
libopus 1.3.1 h7f98852_1 conda-forge
libpng 1.6.37 h21135ba_2 conda-forge
libpq 13.3 hd57d9b9_0 conda-forge
librttopo 1.1.0 h1185371_6 conda-forge
libsodium 1.0.18 h36c2ea0_1 conda-forge
libspatialindex 1.9.3 h9c3ff4c_4 conda-forge
libspatialite 5.0.1 he52d314_3 conda-forge
libssh2 1.10.0 ha56f1ee_0 conda-forge
libstdcxx-ng 11.1.0 h56837e0_8 conda-forge
libtiff 4.2.0 hbd63e13_2 conda-forge
libuuid 2.32.1 h7f98852_1000 conda-forge
libvorbis 1.3.7 h9c3ff4c_0 conda-forge
libwebp-base 1.2.1 h7f98852_0 conda-forge
libxcb 1.13 h7f98852_1003 conda-forge
libxkbcommon 1.0.3 he3ba5ed_0 conda-forge
libxml2 2.9.12 h72842e0_0 conda-forge
locket 0.2.0 py_2 conda-forge
lz4-c 1.9.3 h9c3ff4c_1 conda-forge
mapclassify 2.4.3 pyhd8ed1ab_0 conda-forge
markupsafe 2.0.1 py39h3811e60_0 conda-forge
matplotlib-base 3.4.3 py39h2fa2bec_0 conda-forge
matplotlib-inline 0.1.2 pyhd8ed1ab_2 conda-forge
mistune 0.8.4 py39h3811e60_1004 conda-forge
msgpack-python 1.0.2 py39h1a9c180_1 conda-forge
multidict 5.1.0 py39h3811e60_1 conda-forge
munch 2.5.0 py_0 conda-forge
mypy_extensions 0.4.3 py39hf3d152e_3 conda-forge
mysql-common 8.0.25 ha770c72_0 conda-forge
mysql-libs 8.0.25 h935591d_0 conda-forge
nbclient 0.5.4 pyhd8ed1ab_0 conda-forge
nbconvert 6.1.0 py39hf3d152e_0 conda-forge
nbformat 5.1.3 pyhd8ed1ab_0 conda-forge
ncurses 6.2 h58526e2_4 conda-forge
nest-asyncio 1.5.1 pyhd8ed1ab_0 conda-forge
netcdf4 1.5.6 nompi_py39h36800e2_102 conda-forge
networkx 2.6.2 pyhd8ed1ab_0 conda-forge
notebook 6.4.3 pyha770c72_0 conda-forge
nspr 4.30 h9c3ff4c_0 conda-forge
nss 3.69 hb5efdd6_0 conda-forge
numpy 1.21.2 py39hdbf815f_0 conda-forge
numpydoc 1.1.0 py_1 conda-forge
olefile 0.46 pyh9f0ad1d_1 conda-forge
openjpeg 2.4.0 hb52868f_1 conda-forge
openssl 1.1.1l h7f98852_0 conda-forge
packaging 21.0 pyhd8ed1ab_0 conda-forge
pandas 1.3.2 py39hde0f152_0 conda-forge
pandoc 2.14.2 h7f98852_0 conda-forge
pandocfilters 1.4.2 py_1 conda-forge
parso 0.8.2 pyhd8ed1ab_0 conda-forge
partd 1.2.0 pyhd8ed1ab_0 conda-forge
pathspec 0.9.0 pyhd8ed1ab_0 conda-forge
pcre 8.45 h9c3ff4c_0 conda-forge
pexpect 4.8.0 pyh9f0ad1d_2 conda-forge
pickleshare 0.7.5 py39hde42818_1002 conda-forge
pillow 8.2.0 py39hf95b381_1 conda-forge
pip 21.2.4 pyhd8ed1ab_0 conda-forge
pixman 0.40.0 h36c2ea0_0 conda-forge
platformdirs 2.3.0 pyhd8ed1ab_0 conda-forge
pooch 1.5.1 pyhd8ed1ab_0 conda-forge
poppler 0.89.0 h2de54a5_5 conda-forge
poppler-data 0.4.10 0 conda-forge
postgresql 13.3 h2510834_0 conda-forge
proj 7.2.0 h277dcde_2 conda-forge
prometheus_client 0.11.0 pyhd8ed1ab_0 conda-forge
prompt-toolkit 3.0.20 pyha770c72_0 conda-forge
prompt_toolkit 3.0.20 hd8ed1ab_0 conda-forge
psutil 5.8.0 py39h3811e60_1 conda-forge
pthread-stubs 0.4 h36c2ea0_1001 conda-forge
ptyprocess 0.7.0 pyhd3deb0d_0 conda-forge
pycparser 2.20 pyh9f0ad1d_2 conda-forge
pygeos 0.10.2 py39ha61afbd_0 conda-forge
pygments 2.10.0 pyhd8ed1ab_0 conda-forge
pyopenssl 20.0.1 pyhd8ed1ab_0 conda-forge
pyparsing 2.4.7 pyh9f0ad1d_0 conda-forge
pyproj 3.1.0 py39h50a64a9_3 conda-forge
pyqt 5.12.3 py39hf3d152e_7 conda-forge
pyqt-impl 5.12.3 py39h0fcd23e_7 conda-forge
pyqt5-sip 4.19.18 py39he80948d_7 conda-forge
pyqtchart 5.12 py39h0fcd23e_7 conda-forge
pyqtwebengine 5.12.1 py39h0fcd23e_7 conda-forge
pyrsistent 0.17.3 py39h3811e60_2 conda-forge
pyshp 2.1.3 pyh44b312d_0 conda-forge
pysocks 1.7.1 py39hf3d152e_3 conda-forge
python 3.9.7 h49503c6_0_cpython conda-forge
python-dateutil 2.8.2 pyhd8ed1ab_0 conda-forge
python_abi 3.9 2_cp39 conda-forge
pytz 2021.1 pyhd8ed1ab_0 conda-forge
pyyaml 5.4.1 py39h3811e60_1 conda-forge
pyzmq 22.2.1 py39h37b5a0c_0 conda-forge
qt 5.12.9 hda022c4_4 conda-forge
qtconsole 5.1.1 pyhd8ed1ab_0 conda-forge
qtpy 1.11.0 pyhd8ed1ab_0 conda-forge
rasterio 1.2.6 py39h63973eb_0 conda-forge
readline 8.1 h46c0cb4_0 conda-forge
regex 2021.8.28 py39h3811e60_0 conda-forge
regionmask 0.7.1.dev18+g0dc6632.d20210906 dev_0 <develop>
requests 2.26.0 pyhd8ed1ab_0 conda-forge
rtree 0.9.7 py39hb102c33_2 conda-forge
scikit-learn 0.24.2 py39h7c5d8c9_1 conda-forge
scipy 1.7.1 py39hee8e79c_0 conda-forge
send2trash 1.8.0 pyhd8ed1ab_0 conda-forge
setuptools 57.4.0 py39hf3d152e_0 conda-forge
shapely 1.7.1 py39ha61afbd_5 conda-forge
six 1.16.0 pyh6c4a22f_0 conda-forge
snowballstemmer 2.1.0 pyhd8ed1ab_0 conda-forge
snuggs 1.4.7 py_0 conda-forge
sortedcontainers 2.4.0 pyhd8ed1ab_0 conda-forge
sphinx 4.1.2 pyh6c4a22f_1 conda-forge
sphinx_rtd_theme 0.5.2 pyhd8ed1ab_1 conda-forge
sphinxcontrib-applehelp 1.0.2 py_0 conda-forge
sphinxcontrib-devhelp 1.0.2 py_0 conda-forge
sphinxcontrib-htmlhelp 2.0.0 pyhd8ed1ab_0 conda-forge
sphinxcontrib-jsmath 1.0.1 py_0 conda-forge
sphinxcontrib-qthelp 1.0.3 py_0 conda-forge
sphinxcontrib-serializinghtml 1.1.5 pyhd8ed1ab_0 conda-forge
sqlite 3.36.0 h9cd32fc_0 conda-forge
tblib 1.7.0 pyhd8ed1ab_0 conda-forge
terminado 0.11.1 py39hf3d152e_0 conda-forge
testpath 0.5.0 pyhd8ed1ab_0 conda-forge
threadpoolctl 2.2.0 pyh8a188c0_0 conda-forge
tiledb 2.2.9 h91fcb0e_0 conda-forge
tk 8.6.11 h27826a3_1 conda-forge
tomli 1.2.1 pyhd8ed1ab_0 conda-forge
toolz 0.11.1 py_0 conda-forge
tornado 6.1 py39h3811e60_1 conda-forge
traitlets 5.1.0 pyhd8ed1ab_0 conda-forge
typed-ast 1.4.3 py39h3811e60_0 conda-forge
typing-extensions 3.10.0.0 hd8ed1ab_0 conda-forge
typing_extensions 3.10.0.0 pyha770c72_0 conda-forge
tzcode 2021a h7f98852_2 conda-forge
tzdata 2021a he74cb21_1 conda-forge
urllib3 1.26.6 pyhd8ed1ab_0 conda-forge
wcwidth 0.2.5 pyh9f0ad1d_2 conda-forge
webencodings 0.5.1 py_1 conda-forge
wheel 0.37.0 pyhd8ed1ab_1 conda-forge
widgetsnbextension 3.5.1 py39hf3d152e_4 conda-forge
xarray 0.19.0 pyhd8ed1ab_1 conda-forge
xerces-c 3.2.3 h9d8b166_2 conda-forge
xorg-kbproto 1.0.7 h7f98852_1002 conda-forge
xorg-libice 1.0.10 h7f98852_0 conda-forge
xorg-libsm 1.2.3 hd9c2040_1000 conda-forge
xorg-libx11 1.7.2 h7f98852_0 conda-forge
xorg-libxau 1.0.9 h7f98852_0 conda-forge
xorg-libxdmcp 1.1.3 h7f98852_0 conda-forge
xorg-libxext 1.3.4 h7f98852_1 conda-forge
xorg-libxrender 0.9.10 h7f98852_1003 conda-forge
xorg-renderproto 0.11.1 h7f98852_1002 conda-forge
xorg-xextproto 7.3.0 h7f98852_1002 conda-forge
xorg-xproto 7.0.31 h7f98852_1007 conda-forge
xz 5.2.5 h516909a_1 conda-forge
yaml 0.2.5 h516909a_0 conda-forge
yarl 1.6.3 py39h3811e60_2 conda-forge
zeromq 4.3.4 h9c3ff4c_1 conda-forge
zict 2.0.0 py_0 conda-forge
zipp 3.5.0 pyhd8ed1ab_0 conda-forge
zlib 1.2.11 h516909a_1010 conda-forge
zstd 1.4.9 ha95c52a_0 conda-forge
pip list