Europe without coastline

Hello,

This weekend I started using matplotlib and I think it is great.
Beautiful graphs with very little effort.

My data is geographical so I would like to draw on a map, North-Sea (UK
- Netherlands). For this I installed the basemap on my Debian system
(Stable/Wheezy). This has a strange problem. If I zoom out, all is
there. If I start zooming in coastlines disappears. Is this my
mistake, a problem in the packages in Debian, or something else?

Thanks

The resulting image on my system:
http://img21.imageshack.us/img21/385/xoe7.png

My system:
Python 2.7.3 (default, Jan 2 2013, 16:53:07)
[GCC 4.7.2] on linux2

import matplotlib
matplotlib.__version__

'1.1.1rc2'

My code:

import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.basemap import Basemap

import matplotlib as mpl
mpl.rcParams['font.size'] = 8.
mpl.rcParams['font.family'] = 'Arial'
mpl.rcParams['axes.labelsize'] = 5.
mpl.rcParams['xtick.labelsize'] = 5.
mpl.rcParams['ytick.labelsize'] = 5.

#W-Europe
x1 = -16.
x2 = 30.
y1 = 36.
y2 = 62.

m = Basemap(resolution='i',projection='merc', llcrnrlat=y1,urcrnrlat=y2,llcrnrlon=x1,urcrnrlon=x2,lat_ts=(x1+x2)/2)
m.drawcountries(linewidth=0.5)
m.drawcoastlines(linewidth=0.5)
m.drawparallels(np.arange(y1,y2,2.),labels=[1,0,0,0],color='black',dashes=[1,0],labelstyle='+/-',linewidth=0.2)
m.drawmeridians(np.arange(x1,x2,2.),labels=[0,0,0,1],color='black',dashes=[1,0],labelstyle='+/-',linewidth=0.2)

plt.savefig('eur_101.png',dpi=100)
plt.show()

Hi,

I am using mat 1.20 and basemap 1.0.5, I tried your code and don’t have the same issue.

Chao

···

On Tue, Aug 6, 2013 at 9:33 AM, vwf [via matplotlib] <[hidden email]> wrote:

Hello,

This weekend I started using matplotlib and I think it is great.

Beautiful graphs with very little effort.

My data is geographical so I would like to draw on a map, North-Sea (UK

  • Netherlands). For this I installed the basemap on my Debian system

(Stable/Wheezy). This has a strange problem. If I zoom out, all is

there. If I start zooming in coastlines disappears. Is this my

mistake, a problem in the packages in Debian, or something else?

Thanks

The resulting image on my system:

http://img21.imageshack.us/img21/385/xoe7.png

My system:

Python 2.7.3 (default, Jan 2 2013, 16:53:07)
[GCC 4.7.2] on linux2

import matplotlib

matplotlib.version

‘1.1.1rc2’

My code:

import numpy as np

import matplotlib.pyplot as plt

from mpl_toolkits.basemap import Basemap

import matplotlib as mpl

mpl.rcParams[‘font.size’] = 8.

mpl.rcParams[‘font.family’] = ‘Arial’

mpl.rcParams[‘axes.labelsize’] = 5.

mpl.rcParams[‘xtick.labelsize’] = 5.

mpl.rcParams[‘ytick.labelsize’] = 5.

#W-Europe

x1 = -16.

x2 = 30.

y1 = 36.

y2 = 62.

m = Basemap(resolution=‘i’,projection=‘merc’, llcrnrlat=y1,urcrnrlat=y2,llcrnrlon=x1,urcrnrlon=x2,lat_ts=(x1+x2)/2)

m.drawcountries(linewidth=0.5)

m.drawcoastlines(linewidth=0.5)

m.drawparallels(np.arange(y1,y2,2.),labels=[1,0,0,0],color=‘black’,dashes=[1,0],labelstyle=’+/-’,linewidth=0.2)

m.drawmeridians(np.arange(x1,x2,2.),labels=[0,0,0,1],color=‘black’,dashes=[1,0],labelstyle=’+/-’,linewidth=0.2)

plt.savefig(‘eur_101.png’,dpi=100)

plt.show()


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Chao YUE
Laboratoire des Sciences du Climat et de l’Environnement (LSCE-IPSL)
UMR 1572 CEA-CNRS-UVSQ
Batiment 712 - Pe 119
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Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16



View this message in context: Re: Europe without coastline

Sent from the matplotlib - users mailing list archive at Nabble.com.

After building matplotlib 1.2.0 and basemap 1.0.6 packages for Debian
the problem is gone: I have coastlines now.

Thanks

···

On Tue, Aug 06, 2013 at 01:46:15AM -0700, ChaoYue wrote:

I am using mat 1.20 and basemap 1.0.5, I tried your code and don't have the
same issue.