Scalebar

docs/source/contributors.rst

@@ -40,6 +40,7 @@ the package wouldn't be as rich or diverse as it is today:
  * Greg Lucas
  * Sadie Bartholomew
  * Kacper Makuch
+ * Philipe Riskalla Leal
 
 Thank you!
 

examples/gridlines_and_labels/gridliner.py

@@ -1,3 +1,10 @@
+# Copyright Cartopy Contributors
+#
+# This file is part of Cartopy and is released under the LGPL license.
+# See COPYING and COPYING.LESSER in the root of the repository for full
+# licensing details.
+
+
 """
 Gridlines and tick labels
 -------------------------
@@ -44,6 +51,75 @@ def main():
     gl.right_labels = False
     plt.show()
 
+    plt.figure(figsize=(7, 3))
+    ax3 = plt.axes(projection=ccrs.PlateCarree())
+    ax3.set_extent([-65, -40, -15, 10])
+
+    # Create a feature for States/Admin 1 regions at 1:50m from Natural Earth
+    states_provinces = cfeature.NaturalEarthFeature(
+        category='cultural',
+        name='admin_1_states_provinces_lines',
+        scale='50m',
+        facecolor='none')
+    ax3.add_feature(states_provinces, edgecolor='gray')
+
+    ax3.coastlines(resolution='110m')
+    ax3.coastlines(resolution='110m')
+    gl = ax3.gridlines(draw_labels=True)
+
+    gl.change_gridline_tick_decimal_separator('{0:.3f}',
+                                              axis='both')
+
+    gl.set_latitude_hemisphere_str('Norte', 'Sul')
+
+    gl.set_longitude_hemisphere_str('O', 'L')
+
+    gl.top_labels = False
+    gl.right_labels = False
+    plt.show()
+
+    return plt.gcf().get_axes(), gl
+
+
+def gridliner_with_custom_changes_in_its_ticklabels():
+
+    import cartopy.feature as cfeature
+    plt.figure(figsize=(7, 3))
+    ax3 = plt.axes(projection=ccrs.PlateCarree())
+    ax3.set_extent([-65, 40, -15, 10])
+
+    # Create a feature for States/Admin 1 regions at 1:50m from Natural Earth
+    states_provinces = cfeature.NaturalEarthFeature(
+        category='cultural',
+        name='admin_1_states_provinces_lines',
+        scale='50m',
+        facecolor='none')
+    ax3.add_feature(states_provinces, edgecolor='gray')
+
+    ax3.coastlines(resolution='110m')
+    ax3.coastlines(resolution='110m')
+    gl = ax3.gridlines(draw_labels=True)
+
+    gl.change_gridline_tick_decimal_separator('{0:.2f}',
+                                              axis='both',
+                                              decimal_separator=',')
+
+    gl.set_latitude_hemisphere_str(' - Norte', ' - Sul')
+
+    gl.set_longitude_hemisphere_str('Oeste', 'Leste')
+
+    gl.top_labels = False
+    gl.right_labels = False
+    plt.show()
+    plt.close('all')
+
 
 if __name__ == '__main__':
-    main()
+
+    gridliner_with_custom_changes_in_its_ticklabels()
+
+    axes, gl = main()
+
+    print('N° of axes ', len(axes))
+
+    ax = axes[0]

examples/miscellanea/favicon.py

@@ -13,6 +13,7 @@
 import numpy as np
 
 
+
 def main():
     fig = plt.figure(figsize=[8, 8])
     ax = fig.add_subplot(1, 1, 1, projection=ccrs.SouthPolarStereo())

examples/scalebar/scalebar_usage_examples.py

@@ -0,0 +1,61 @@
+# Copyright Cartopy Contributors
+#
+# This file is part of Cartopy and is released under the LGPL license.
+# See COPYING and COPYING.LESSER in the root of the repository for full
+# licensing details.
+
+import matplotlib.pyplot as plt
+import cartopy.crs as ccrs
+from cartopy.mpl.scalebar import fancy_scalebar
+
+
+def scalebar_invoqued_as_an_independent_object_geoaxes():
+
+    fig, axes = plt.subplots(1, 2,
+                             subplot_kw={'projection':
+                                         ccrs.Mercator()})
+
+    projections = [ccrs.Mercator(), ccrs.PlateCarree()]
+
+    axes = axes.ravel()
+
+    for proj, ax in zip(projections, axes):
+        ax.projection = proj
+        fancy_scalebar(ax,
+                       location=(0.5, 0.2),
+                       length=1000_000,
+                       unit_name='km',
+                       angle=0,
+                       max_stripes=5,
+                       fontsize=8,
+                       dy=0.05)
+
+        ax.gridlines(draw_labels=True)
+        ax.stock_img()
+        ax.coastlines()
+
+
+def scalebar_from_within_geoaxes():
+
+    fig, axes = plt.subplots(1, 2,
+                             subplot_kw={'projection':
+                                         ccrs.Mercator()})
+
+    projections = [ccrs.Mercator(),
+                   ccrs.PlateCarree()]
+
+    axes = axes.ravel()
+
+    for proj, ax in zip(projections, axes):
+        ax.projection = proj
+
+        ax.set_extent([-60, -35, -40, 10])
+        ax.gridlines(draw_labels=True)
+        ax.add_scalebar(location=(0.5, 0.5),
+                        length=250_000,
+                        dy=5,
+                        max_stripes=3)
+        ax.stock_img()
+        ax.coastlines()
+
+    fig.show()

lib/cartopy/mpl/clip_path.py

@@ -30,10 +30,13 @@ def intersection_point(p0, p1, p2, p3):
         raise ValueError('Lines are parallel and cannot '
                          'intersect at any one point.')
 
-    x = ((x_1 * y_2 - y_1 * x_2) * (x_3 - x_4) - (x_1 - x_2) * (x_3 *
-         y_4 - y_3 * x_4)) / div
-    y = ((x_1 * y_2 - y_1 * x_2) * (y_3 - y_4) - (y_1 - y_2) * (x_3 *
-         y_4 - y_3 * x_4)) / div
+    x = ((x_1 * y_2 - y_1 * x_2) *
+         (x_3 - x_4) - (x_1 - x_2) * (x_3 * y_4 - y_3 * x_4)
+         ) / div
+
+    y = ((x_1 * y_2 - y_1 * x_2) * (y_3 - y_4) -
+         (y_1 - y_2) * (x_3 * y_4 - y_3 * x_4)
+         ) / div
 
     return x, y
 

lib/cartopy/mpl/feature_artist.py

@@ -32,6 +32,7 @@ class _GeomKey:
     A workaround for Shapely polygons no longer being hashable as of 1.5.13.
 
     """
+
     def __init__(self, geom):
         self._id = id(geom)