Add support for cartopy v0.18

CHANGELOG.rst

@@ -67,13 +67,9 @@ ProPlot v0.7.0 (2020-##-##)
 ProPlot v0.6.0 (2020-##-##)
 ===========================
 
-Rather than creating branches and opening pull requests, this release was
-developed by running the testing suite on my local machine and making commits
-directly to master. I will try to avoid this sort of workflow in the future.
-
 .. rubric:: Deprecated
 
-There are quite a lot of deprecations for this release. Since this is
+There are quite a lot of deprecations for this release.
 
 - Deprecate support for "parametric" plots inside `~matplotlib.axes.Axes.plot`,
   instead use `~proplot.axes.Axes.parametric` (:commit:`64210bce`).
@@ -114,11 +110,15 @@ There are quite a lot of deprecations for this release. Since this is
   `~proplot.styletools.LinearSegmentedColormap.truncated` to
   `~proplot.styletools.LinearSegmentedColormap.truncate`, and
   `~proplot.styletools.LinearSegmentedColormap.punched` to
-  `~proplot.styletools.LinearSegmentedColormap.cut` (:pr:`e1a08930`).  The old
+  `~proplot.styletools.LinearSegmentedColormap.cut` (:commit:`e1a08930`).  The old
   method names remain with a deprecation warning.
 
 .. rubric:: Features
 
+- Support `cartopy 0.18 <https://scitools.org.uk/cartopy/docs/latest/whats_new.html>`__
+  locators, formatters, deprecations, and new labelling features (:pr:`158`).
+- Add :rcraw:`geogrid.labelpad` and :rcraw:`geogrid.rotatelabels` settings
+  for cartopy gridline labels (:pr:`158`).
 - Support more `~proplot.ticker.AutoFormatter` features on
   `~proplot.ticker.SimpleFormatter` (:commit:`6decf962`).
 - Support drawing colorbars with descending levels (:commit:`10763146`)

docs/configuration.rst

@@ -135,7 +135,7 @@ Finally, the ``geoaxes``, ``land``, ``ocean``, ``rivers``, ``lakes``,
 the corresponding :ref:`quick settings <rc_quick>` are turned on.
 
 ===============================  =========================================================================================================================================================================================================================================================
-Key(s)                           Description
+Key                              Description
 ===============================  =========================================================================================================================================================================================================================================================
 ``abc.style``                    a-b-c label style. For options, see `~proplot.axes.Axes.format`.
 ``abc.loc``                      a-b-c label position. For options, see `~proplot.axes.Axes.format`.
@@ -165,11 +165,17 @@ Key(s)                           Description
 ``geoaxes.facecolor``            Face color for the map outline patch.
 ``geoaxes.edgecolor``            Edge color for the map outline patch.
 ``geoaxes.linewidth``            Edge width for the map outline patch.
+``geogrid.alpha``                Opacity of geographic gridlines.
+``geogrid.color``                Color of geographic gridlines.
+``geogrid.labelpad``             Default padding in points between map boundary edge and longitude/latitude labels.
 ``geogrid.labels``               Boolean, indicates whether to label the parallels and meridians.
 ``geogrid.labelsize``            Font size for latitude and longitude labels. Inherits from ``small``.
 ``geogrid.latmax``               Absolute latitude in degrees, poleward of which meridian gridlines are cut off.
-``geogrid.lonstep``              Default interval for meridian gridlines in degrees.
 ``geogrid.latstep``              Default interval for parallel gridlines in degrees.
+``geogrid.linestyle``            Line style for geographic gridlines.
+``geogrid.linewidth``            line width for geographic gridlines.
+``geogrid.lonstep``              Default interval for meridian gridlines in degrees.
+``geogrid.rotatelabels``         Whether to rotate meridian and parallel gridline labels on cartopy axes.
 ``gridminor.linewidth``          Minor gridline width.
 ``gridminor.linestyle``          Minor gridline style.
 ``gridminor.alpha``              Minor gridline transparency.

docs/environment.yml

@@ -1,5 +1,7 @@
 # Hard requirements for notebook examples and documentation build
 # Proplot itself just needs matplotlib
+# NOTE: Basemap is broken as of matplotlib >=3.3 so for documentation
+# use 3.2.1. Probably lots of basemap holdouts for next ~5 years.
 # NOTE: PyQt5 is needed by pyplot, RTD server *happens* to already have it
 # but creating local environment will fail.
 name: proplot-dev
@@ -10,8 +12,8 @@ dependencies:
   - numpy
   - xarray
   - pandas
-  - matplotlib
-  - cartopy=0.17
+  - matplotlib==3.2.1
+  - cartopy
   - basemap
   - pandoc
   - ipykernel

docs/projections.py

@@ -1,11 +1,12 @@
+# -*- coding: utf-8 -*-
 # ---
 # jupyter:
 #   jupytext:
 #     text_representation:
 #       extension: .py
 #       format_name: percent
 #       format_version: '1.3'
-#       jupytext_version: 1.3.0
+#       jupytext_version: 1.4.2
 #   kernelspec:
 #     display_name: Python 3
 #     language: python
@@ -98,7 +99,7 @@
 # default, but you can switch to basemap using ``basemap=True``.
 # When you request map projections, `~proplot.ui.subplots` returns
 # instances of `~proplot.axes.CartopyAxes` or `~proplot.axes.BasemapAxes`.
-
+#
 # * `~proplot.axes.CartopyAxes` joins the cartopy
 #   `~cartopy.mpl.geoaxes.GeoAxes` class with the ProPlot
 #   `~matplotlib.axes.Axes` class and adds a `~proplot.axes.GeoAxes.format`
@@ -163,10 +164,11 @@
     },
     ncols=2, nrows=5
 )
-axs.format(suptitle='Figure with several projections')
-axs.format(coast=True, latlines=30, lonlines=60)
-axs[:, 1].format(labels=True, lonlines=plot.arange(-180, 179, 60))
-axs[-1, -1].format(labels=True, lonlines=30)
+axs.format(
+    suptitle='Figure with several projections',
+    coast=True, latlines=30, lonlines=60, labels=True,
+)
+axs[-1, :].format(labels=True, lonlines=30)
 axs.format(collabels=['Cartopy projections', 'Basemap projections'])
 plot.rc.reset()