Update examples/gallery/lines/great_circles.py

Co-authored-by: Dongdong Tian <seisman.info@gmail.com>

Author: michaelgrund

examples/gallery/lines/great_circles.py

@@ -20,7 +20,7 @@
 
 # create a plot with coast and Mercator projection (M)
 fig.basemap(region=[-100, 0, 0, 70], projection="M12c", frame=True)
-fig.coast(shorelines=True)
+fig.coast(shorelines=True, area_thresh=5000)
 
 # plot individual points of first great circle as seagreen line
 fig.plot(x=points1.r, y=points1.s, pen="2p,seagreen")