python - Plot ConvexHull in basemap -


i making convexhull in python, set of latitude , longitudinal positions. want plot points, alongside convexhull in basemap. works fine if plot them in normal plot without map,as follow instructions http://docs.scipy.org/doc/scipy/reference/generated/scipy.spatial.convexhull.html#scipy.spatial.convexhull. when try plot them basemap, regular plot. do wrong?

import matplotlib.pyplot plt import numpy np mpl_toolkits.basemap import basemap  map = basemap(projection='merc',     resolution = 'c', area_thresh = 40,     llcrnrlon=27.72, llcrnrlat=69.41,     urcrnrlon=28.416, urcrnrlat=70.95) con = lite.connect(databasepath)     con:          cur = con.execute("select distinct latitude, longitude messagetype1 latitude>= 70.55 , latitude<= 70.7 , longitude >= 27.72 , longitude <= 28.416 limit 100 ")         points = [[float(x[1]), float(x[0])]  x in cur]         points = np.array(points)         hull = convexhull(points)          x,y = map(points[:,0], points[:,1])         plt.plot(x, y, 'o')         simplex in hull.simplices:             x,y = map(points[simplex,0], points[simplex,1])             plt.plot(x,y, 'k-')         plt.show()

you need add methods after setting basemap draw map features. eg:

map.drawcoastlines() map.drawstates() map.drawcountries() map.drawmapboundary()

see documentation: http://matplotlib.org/basemap/users/geography.html


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