From 0356b1f5680151cbf10f712bc217a0e3d0a598cd Mon Sep 17 00:00:00 2001
From: Lars Buntemeyer <larsbuntemeyer@gmail.com>
Date: Sun, 2 Jul 2023 20:39:04 +0200
Subject: [PATCH 1/3] added accessor map function

---
 cordex/accessor.py | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/cordex/accessor.py b/cordex/accessor.py
index 876fa0b..951ec70 100644
--- a/cordex/accessor.py
+++ b/cordex/accessor.py
@@ -73,6 +73,44 @@ def guess(self):
             self._guess = _guess_domain(self._obj)
         return self._guess
 
+    def map(self, projection=None):
+        """ """
+        import cartopy.crs as ccrs
+        import cartopy.feature as cf
+        import cartopy.io.img_tiles as cimgt
+        import matplotlib.pyplot as plt
+
+        obj = self._obj
+
+        mapping = obj.cf["grid_mapping"]
+        pole = (
+            mapping.grid_north_pole_longitude,
+            mapping.grid_north_pole_latitude,
+        )
+        transform = ccrs.RotatedPole(*pole)
+        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.gridlines(
+            draw_labels=True,
+            linewidth=0.5,
+            color="gray",
+            xlocs=range(-180, 180, 10),
+            ylocs=range(-90, 90, 5),
+        )
+        ax.set_extent(
+            [obj.rlon.min(), obj.rlon.max(), obj.rlat.min(), obj.rlat.max()],
+            crs=transform,
+        )
+        ax.coastlines(resolution="50m", color="black", linewidth=1)
+        ax.add_feature(cf.BORDERS, color="black")
+
+        return ax
+        # ax.set_title(CORDEX_domain)
+
 
 @xr.register_dataset_accessor("cx")
 class CordexDatasetAccessor(CordexAccessor):

From 6a921d7542c443fd9376d5b7f759733bdd2f9e0c Mon Sep 17 00:00:00 2001
From: Lars Buntemeyer <larsbuntemeyer@gmail.com>
Date: Sun, 2 Jul 2023 20:44:57 +0200
Subject: [PATCH 2/3] update api docs

---
 cordex/accessor.py | 12 +++++++++++-
 docs/api.rst       |  1 +
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/cordex/accessor.py b/cordex/accessor.py
index 951ec70..a58a42a 100644
--- a/cordex/accessor.py
+++ b/cordex/accessor.py
@@ -74,7 +74,17 @@ def guess(self):
         return self._guess
 
     def map(self, projection=None):
-        """ """
+        """Create a simple overview map.
+
+        Creates a simple map overview. By default, the map projection
+        defaults to the grid mapping attribute.
+
+        Returns
+        -------
+        ax : GeoAxesSubplot
+            Cartopy plot projection using tiles.
+
+        """
         import cartopy.crs as ccrs
         import cartopy.feature as cf
         import cartopy.io.img_tiles as cimgt
diff --git a/docs/api.rst b/docs/api.rst
index f892c88..05fa2d8 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -106,3 +106,4 @@ Methods
 
     Dataset.cx.info
     Dataset.cx.guess
+    Dataset.cx.map

From b0c9e94a1bacbb1dac2ee78cdf658b30d3e1eac5 Mon Sep 17 00:00:00 2001
From: Lars Buntemeyer <larsbuntemeyer@gmail.com>
Date: Mon, 3 Jul 2023 08:58:07 +0200
Subject: [PATCH 3/3] update docs

---
 cordex/accessor.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cordex/accessor.py b/cordex/accessor.py
index a58a42a..31403d0 100644
--- a/cordex/accessor.py
+++ b/cordex/accessor.py
@@ -79,6 +79,12 @@ def map(self, projection=None):
         Creates a simple map overview. By default, the map projection
         defaults to the grid mapping attribute.
 
+        Parameters
+        ----------
+        projection : cartopy.crs
+            CRS used for projection. By default, the map projection
+            defaults to the CRS defined by the grid mapping attribute.
+
         Returns
         -------
         ax : GeoAxesSubplot