small bug in drawmapscale

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
68/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Stale
Tech stack
matplotlib, python

Research direction

Start at the Basemap.drawmapscale entry point and inspect the fancy-style frame and tick plotting calls shown in the issue. Reproduce the supplied example with two axes, then verify that every part of the map scale is plotted on the ax0 axes rather than the current axes.

Written by the indexing model from the issue text.

Description

When using fancy style, the argument ax is not passed to self.plot while plotting the frame and ticks, ex:
#plot bottom line
rets.append(self.plot([x1,x4],[ybottom,ybottom],color=fontcolor)[0])

Thus, part of the map scale may be plotted in a different axes. Ex:

import pylab as pl
from mpl_toolkits.basemap import Basemap
m = Basemap(width=3000e3,height=3000e3,resolution='l',
         projection='lcc',lat_1=50.,lat_0=47,lon_0=1.)

ax0=pl.axes()
ax1=pl.axes([.6,.5,.15,.15])
m.drawcoastlines(ax=ax0)
lon,lat=-15,47
lon0,lat0=lon,lat
scaleL=400
#pl.axes(ax0) #this will avoid the problem...
o=m.drawmapscale(ax=ax0,lon=lon,lat=lat,lon0=lon0,lat0=lat0,
                   length=scaleL,barstyle='fancy',fontcolor='r')
Dominant language
Python
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