[Matplotlib-users] Slow drawing of many lines in Basemap

[Zane S. <za...@id...>]

I'm drawing several hundred lines at a time, each consisting of 10-100  
points, and it takes a couple of minutes for them all to display,  
which makes me think I must be doing something stupid.

The function that does the drawing looks like this:

def plotlinmap(lins, map=None):
     if map is None:
         map = Basemap()

     map.drawmapboundary(fill_color="white")
     map.drawmeridians(range(-180,181,30)), labels=[1,0,0,1])
     map.drawparallels(range(-90,91,30)), labels=[1,0,0,1])

     for lin in lins:
         x,y = map(degrees(lin.longitudes()),degrees(lin.latitudes()))
         map.plot(x,y)

     return(map)

It displays one line at a time, whenever map.plot() is called.  Really  
I'd like it to just do all the drawing at the end (assuming that would  
make the whole process much faster).  Is there some way to cleanly  
pass map.plot() a big list of lines to draw?  I'm sure there is and  
I'm just being dense.  Argh.

--
Zane Selvans
Amateur Earthling
http://zaneselvans.org
za...@id...
303/815-6866
PGP Key: 55E0815F