Hrafnkell Pálsson wrote:
> Jeff Whitaker wrote:
>
>> Hrafnkell:
>>
>> Had some time this morning, so I used John's method to create a working
>> Basemap example:
>>
>> import matplotlib
>> matplotlib.use('Agg')
>> from mpl_toolkits.basemap import Basemap
>> import matplotlib.pyplot as plt
>>
>> # this example shows how to save a map background and
>> # reuse it in another figure.
>>
>> # make sure we have all the same properties on all figs
>> figprops = dict(figsize=(8,6), dpi=100, facecolor='white')
>>
>> # generate the first figure.
>> fig1 = plt.figure(1,**figprops)
>> ax1 = fig1.add_subplot(111)
>> # create basemap instance, plot coastlines.
>> map = Basemap(projection='moll',lon_0=0)
>> map.drawcoastlines()
>> map.drawmapboundary(fill_color='aqua')
>> map.fillcontinents(color='coral',lake_color='aqua')
>> fig1.canvas.draw()
>> background = fig1.canvas.copy_from_bbox(fig1.bbox)
>> fig1.savefig('figure1.png', dpi=100)
>>
>>
>> # generate the second figure, re-using the background
>> # from figure 1.
>> fig2 = plt.figure(2,frameon=False,**figprops)
>> ax2 = fig2.add_subplot(111, frameon=False, xticks=[], yticks=[])
>> # restore previous background.
>> fig2.canvas.restore_region(background)
>> # draw parallels and meridians on existing background.
>> map.drawparallels(range(-90,90,30))
>> map.drawmeridians(range(-180,180,60))
>> fig2.savefig('figure2.png', dpi=100)
>>
>>
>> I've added this to the basemap examples directory as save_background.py
>>
>> HTH,
>>
>> -Jeff
>>
>>
>
> There's still one snag.
> Using your example I could restore the background.
> But it turns out everything is plotted over the background; so if my
> background consist only of the coastline and then I do a filled contour plot
> after restoring it the coastline disappears under the filled contours (by
> using the alpha keyword to contourf I could see the coastline beneath).
>
> Had I plotted the coastline into the figure instead of restoring it this
> would not have happened.
>
> Is there any way of avoiding this?
>
> Hrafnkell
>
>
>
>
Hrafnkell:
I see your point, but I don't see any obvious solution. Perhaps someone with
more knowledge of matplotlib internals (John?) can answer.
-Jeff
--
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/PSD R/PSD1 Email : [EMAIL PROTECTED]
325 Broadway Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
