On 1/19/12 10:02 AM, Alexis Praga wrote:
> Hi,
>
> Trying the code at
> http://matplotlib.sourceforge.net/basemap/doc/html/users/ortho.html ,
> for zooming in a certain region on a globe, I have found some issues
> with the approach provided.
> For example, it does not work on the poles.
> Here is my suggestion for a zoom with a factor = coef.
>
> #########################################################################
>
> from mpl_toolkits.basemap import Basemap
> import numpy as np
> import matplotlib.pyplot as plt
>
> fig = plt.figure()
> # global ortho map centered on lon_0,lat_0
> lat_0=90.; lon_0=0.
> # resolution = None means don't process the boundary datasets.
> m1 = Basemap(projection='ortho',lon_0=lon_0,lat_0=lat_0,resolution=None)
>
> width = m1.urcrnrx - m1.llcrnrx
> height = m1.urcrnry - m1.llcrnry
>
> coef = 0.5
> width = width*coef
> height = height*coef
> m = Basemap(projection='ortho',lon_0=lon_0,lat_0=lat_0,resolution='l',\
>     
> llcrnrx=-0.5*width,llcrnry=-0.5*height,urcrnrx=0.5*width,urcrnry=0.5*height)
>
> m.drawcoastlines()
> m.drawcountries()
> # draw parallels and meridians.
> m.drawparallels(np.arange(-90.,120.,30.))
> m.drawmeridians(np.arange(0.,360.,60.))
> m.drawmapboundary()
> plt.show()

Alexis:

This is now fixed in github master (https://github.com/matplotlib/basemap).

-Jeff


-- 
Jeffrey S. Whitaker         Phone  : (303)497-6313
Meteorologist               FAX    : (303)497-6449
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