adding basic support for plotting shapelylinestrings in GeoSeries objects

geopandas/geoseries.py

@@ -4,7 +4,7 @@ from pandas.core.common import isnull
 import matplotlib.pyplot as plt
 from matplotlib import cm
 
-from shapely.geometry import shape, Polygon, Point
+from shapely.geometry import shape, Polygon, Point, LineString
 from shapely.geometry.collection import GeometryCollection
 from shapely.geometry.base import BaseGeometry
 from shapely.ops import cascaded_union, unary_union
@@ -14,6 +14,7 @@ from descartes.patch import PolygonPatch
 EMPTY_COLLECTION = GeometryCollection()
 EMPTY_POLYGON = Polygon()
 EMPTY_POINT = Point()
+EMPTY_LINE = LineString()
 
 
 def _plot_polygon(ax, poly, facecolor='red', edgecolor='black', alpha=0.5):
@@ -41,6 +42,11 @@ def _plot_point(ex, geom):
     """
     pass
 
+def _plot_line(ax, geom, edgecolor="black", alpha=1.0):
+    """ Plot Shapley LineString geometries
+    """
+    x, y = geom.xy
+    ax.plot(x, y, color=edgecolor, solid_capstyle='round', zorder=1)
 
 def _gencolor(N, colormap='Set1'):
     """
@@ -449,6 +455,8 @@ class GeoSeries(Series):
                 _plot_multipolygon(ax, geom, facecolor=color.next())
             elif geom.type == 'Point':
                 _plot_point(ax, geom)
+            elif geom.type == 'LineString':
+                _plot_line(ax, geom, edgecolor=color.next())
         return ax
 
 if __name__ == '__main__':