Re: [Matplotlib-users] Plotting maps with matplotlib-basemap very slow

2015-01-24 Thread Benjamin Root 
10 seconds? That doesn't seem right. Are you running the process as an
apache user or something without a home directory? I suspect that the font
cache is not being created, and so it is having to build the font listing
every time it starts up.

Ben Root
On Jan 24, 2015 1:02 PM, Sappy85 robert.wittk...@gmx.de wrote:

 Hi, yes that helps a lot, reading in the boundaries from a shapefile.

 But does anybody know, how avoid the double inner borders? Coastlines
 seem
 to have a thinner border. Borders between two countries be drawn twice.

 http://matplotlib.1069221.n5.nabble.com/file/n44757/map.png

 Regards



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Re: [Matplotlib-users] Plotting maps with matplotlib-basemap very slow

2015-01-24 Thread Eric Firing 
On 2015/01/24 6:11 AM, Sappy85 wrote:
 I would like to draw very, very simple maps of only europe in matplotlib /
 basemap, which takes very much time (around 10 seconds!). This is just
 unreal!? Setting of resolution is only l (low).
 I need to plot hundreds of those maps every few hours. This would be
 impossible!!? :(

 Here is the very simple code:

 import matplotlib
 matplotlib.use('Agg')
 import matplotlib.pyplot as plt
 from mpl_toolkits.basemap import Basemap

 m = Basemap(projection='stere',lon_0=5,lat_0=90.0,rsphere=6371200.,\

 llcrnrlon=-25.0,urcrnrlon=72.0,llcrnrlat=26.0,urcrnrlat=65.0,resolution='l')


You can save a lot of time by pickling the Basemap instance at this 
point, saving it to a cache.  Then the next time, just pickle.load it 
from the cache.

Eric

 m.drawcoastlines(linewidth=0.2)
 m.drawcountries(linewidth=0.2)
 plt.savefig('/var/www/map.png')


 Hope you can help! :(

 Regards





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Re: [Matplotlib-users] Plotting maps with matplotlib-basemap very slow

2015-01-24 Thread Christian Alis 
Hi,

Have you considered reading from a suitably low-resolution shapefile
instead? I suppose overlays or colors change per generation but not
the geographical area.

Cheers,

Christian


On Sat, Jan 24, 2015 at 4:11 PM, Sappy85 robert.wittk...@gmx.de wrote:
 I would like to draw very, very simple maps of only europe in matplotlib /
 basemap, which takes very much time (around 10 seconds!). This is just
 unreal!? Setting of resolution is only l (low).
 I need to plot hundreds of those maps every few hours. This would be
 impossible!!? :(

 Here is the very simple code:

 import matplotlib
 matplotlib.use('Agg')
 import matplotlib.pyplot as plt
 from mpl_toolkits.basemap import Basemap

 m = Basemap(projection='stere',lon_0=5,lat_0=90.0,rsphere=6371200.,\

 llcrnrlon=-25.0,urcrnrlon=72.0,llcrnrlat=26.0,urcrnrlat=65.0,resolution='l')

 m.drawcoastlines(linewidth=0.2)
 m.drawcountries(linewidth=0.2)
 plt.savefig('/var/www/map.png')


 Hope you can help! :(

 Regards





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Re: [Matplotlib-users] Plotting maps with matplotlib-basemap very slow

2015-01-24 Thread Sappy85 
Hi Ben, 

i run the process as user root on a virtual linux server. Is this a
problem?





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Re: [Matplotlib-users] Plotting maps with matplotlib-basemap very slow

2015-01-24 Thread Sappy85 
Hi,

creating a pickle of the Basmap instance was the correct way. Now it works
great! Thank's all for that quick and helpful support!

Solution as follows:

m = Basemap (...)
pickle.dump(m,open('map.pickle','wb'),-1)  # pickle it


for ... :# loop to generate x plots
pickle.load(open('map.pickle','rb'))   # load here the above pickle
# do some other stuff

Regards
Sappy85



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Re: [Matplotlib-users] Plotting maps with matplotlib-basemap very slow

2015-01-24 Thread Sappy85 
Hi, yes that helps a lot, reading in the boundaries from a shapefile.

But does anybody know, how avoid the double inner borders? Coastlines seem
to have a thinner border. Borders between two countries be drawn twice.

http://matplotlib.1069221.n5.nabble.com/file/n44757/map.png 

Regards



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