fix plots for southern domain

cordex/accessor.py

@@ -162,7 +162,8 @@ def map(self, projection=None):
         """
         import cartopy.crs as ccrs
         import cartopy.feature as cf
-        import cartopy.io.img_tiles as cimgt
+
+        # import cartopy.io.img_tiles as cimgt
         import matplotlib.pyplot as plt
 
         obj = self._obj
@@ -172,13 +173,20 @@ def map(self, projection=None):
             mapping.grid_north_pole_longitude,
             mapping.grid_north_pole_latitude,
         )
-        transform = ccrs.RotatedPole(*pole)
+        central_longitude = 0.0
+        if obj.cf["X"].min() > 0.0:
+            central_longitude = 180.0
+
+        transform = ccrs.RotatedPole(*pole, central_rotated_longitude=central_longitude)
+
         if projection is None:
             projection = transform
+
         ax = plt.axes(projection=projection)
         # use google maps tiles
-        request = cimgt.GoogleTiles()
-        ax.add_image(request, 4)  # , interpolation='spline36', regrid_shape=2000)
+        ax.stock_img()
+        # request = cimgt.GoogleTiles()
+        # ax.add_image(request, 4)  # , interpolation='spline36', regrid_shape=2000)
         ax.gridlines(
             draw_labels=True,
             linewidth=0.5,
@@ -187,10 +195,15 @@ def map(self, projection=None):
             ylocs=range(-90, 90, 5),
         )
         ax.set_extent(
-            [obj.rlon.min(), obj.rlon.max(), obj.rlat.min(), obj.rlat.max()],
+            [
+                obj.rlon.min() - central_longitude,
+                obj.rlon.max() - central_longitude,
+                obj.rlat.min(),
+                obj.rlat.max(),
+            ],
             crs=transform,
         )
-        ax.coastlines(resolution="50m", color="black", linewidth=1)
+        ax.coastlines(resolution="110m", color="black", linewidth=1)
         ax.add_feature(cf.BORDERS, color="black")
 
         return ax

docs/whats_new.rst

@@ -6,11 +6,12 @@ What's New
 UNRELEASED
 ----------
 
+This release introduces the :py:meth:`cell_area` function and adds the ``cell_area`` keyword in :py:meth:`cordex_domain`.
+
 New Features
 ~~~~~~~~~~~~
 
 - Added :py:meth:`cell_area` which computes the cell area of a regular grid, e.g., the cell area in the rotated coordinates of a CORDEX dataset (:pull:`230`).
-
 - New keyword ``cell_area`` in :py:meth:`cordex_domain` which will add a cell area coordinate (:pull:`230`).
 
 Internal Changes
@@ -25,6 +26,9 @@ Internal Changes
 Bugfixes
 ~~~~~~~~
 
+.. currentmodule:: xarray
+
+- Fix :py:meth:`Dataset.cx.map` for the southern hemisphere (:pull:`231`).
 - Ensure ssl verification for VG2500 fetching (:pull:`206`, :pull:`212`).
 - Fix ``flox`` method in cmor module (:pull:`197`).
 
@@ -36,6 +40,8 @@ Patch release that fixes installation and cmor issues.
 Bugfixes
 ~~~~~~~~
 
+.. currentmodule:: cordex
+
 - Fix ``packages`` argument in ``setup.cfg`` (:pull:`192`).
 - Fixed empty mapping_table argument in :py:meth:`cmor.cmorize_variable` (:pull:`187`).