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Paul Hobson wrote:
 > On Wed, Oct 23, 2013 at 9:30 PM, Sourav Chatterjee <sr...@gm...> wrote:
 > 
 > Hello,
 > 
 > I have stereographic projection of the pole. I need to indicate the directions like
 > north,south,east, west, north-east, north-west and so on. Is there any way to do so? 
 > 
 > Thanks
 > Sourav
 > 
 > I am **very far** from a GIS expert, but I believe that the cardinal directions are ambiguous at
 > the poles. In other words, if you're standing on the North Pole, it'd difficult to head in any
 > direction that's not towards the south pole.
 > 
 > Curious to hear if I'm wrong, though.
 > 
Yes, on the North Pole, every direction is South, on the South Pole, every direction is North.
-- 
Piet van Oostrum <pi...@va...>
WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]

Sourav - Are you by chance trying to make a stereonet? If so, your
question makes a bit more sense. If that's what you're doing, have a look
at mplstereonet. https://github.com/joferkington/mplstereonet It currently
doesn't support polar stereonets, but that's something I've been meaning to
add for a long time.
If that's not what you're doing, then perhaps you wanted something similar
to this? (The directions don't have much meaning, as others have already
pointed out):
from mpl_toolkits.basemap import Basemap
import numpy as np
import matplotlib.pyplot as plt
m = Basemap(projection='npstere',boundinglat=10,lon_0=270,resolution='l')
m.drawcoastlines()
m.fillcontinents(color='coral',lake_color='aqua')
m.drawmapboundary(fill_color='aqua')
# draw parallels and meridians.
m.drawparallels(np.arange(-80.,80.,20.))
ticks = m.drawmeridians(np.arange(-180.,180.,20.),
 labels=[True, True, True, True])
# Change the meridian label at 0 and 180 to East and West
for value, label in zip([0.0, -180.0], ['East', 'West']):
 ticks[value][1][0].set_text(label)
plt.show()
Hope that helps!
-Joe
On Wed, Nov 6, 2013 at 1:34 PM, Jason Grout <jas...@cr...>wrote:
> On 11/6/13 1:10 PM, Paul Hobson wrote:
> > I am **very far** from a GIS expert, but I believe that the cardinal
> > directions are ambiguous at the poles. In other words, if you're
> > standing on the North Pole, it'd difficult to head in any direction
> > that's not towards the south pole.
> >
> > Curious to hear if I'm wrong, though.
>
> I'm sure I'm even farther from being a GIS expert (and probably farther
> from one as well :), but I think you raise an interesting point. My
> compass would give me directions at the geographic north pole, given
> that the magnetic north pole is different from the geographic north
> pole. I'm curious how valid it would be to use magnetic north to assign
> directions at the geographic north pole. My guess is not very valid,
> but kind of cool nonetheless.
>
> Jason
>
>
>
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Easily patched the 1.3.0 version in Enthought distribution by replacing
matplotlib\backends\qt4_editor\figureoptions.py line 33-34 with:
COLORS = {'c': '#00bfbf', 'b': '#0000ff', 'w': '#ffffff', 'g': '#008000',
 'y': '#bfbf00', 'k': '#000000', 'r': '#ff0000', 'm': '#bf00bf'}
Excellent!
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Dear Thomas,
I replaced figureoptions.py in 1.3.1 with the corresponding file in your
commit
<https://github.com/rhoef/matplotlib/blob/2bffa69cf7dc6b571fc5fdea27dba560d55a37de/lib/matplotlib/backends/qt4_editor/figureoptions.py> 
, and can confirm that it has resolved the issue.
Thank you very much! I will start using this patch immediately.
Best Regards,
Tim
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Please check if this PR fixes the problem
https://github.com/matplotlib/matplotlib/pull/2112
Regards
Thomas
On Wed, Nov 6, 2013 at 12:52 PM, aperception <per...@gm...>wrote:
> Unfortunately this issue with the color changing after editing axis
> parameters still doesn't appear to have been resolved as of 1.3.1 or in the
> latest source. Is there an easy fix for it? It's a very useful feature for
> me because my figure is embedded in a QT4 GUI without easy access to the
> command line.
>
>
>
> --
> View this message in context:
> http://matplotlib.1069221.n5.nabble.com/Qt4Agg-backend-edit-curves-and-axis-parameters-tp10161p42461.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
> ------------------------------------------------------------------------------
> November Webinars for C, C++, Fortran Developers
> Accelerate application performance with scalable programming models.
> Explore
> techniques for threading, error checking, porting, and tuning. Get the most
> from the latest Intel processors and coprocessors. See abstracts and
> register
> http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk
> _______________________________________________
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>

On 11/6/13 1:10 PM, Paul Hobson wrote:
> I am **very far** from a GIS expert, but I believe that the cardinal
> directions are ambiguous at the poles. In other words, if you're
> standing on the North Pole, it'd difficult to head in any direction
> that's not towards the south pole.
>
> Curious to hear if I'm wrong, though.
I'm sure I'm even farther from being a GIS expert (and probably farther 
from one as well :), but I think you raise an interesting point. My 
compass would give me directions at the geographic north pole, given 
that the magnetic north pole is different from the geographic north 
pole. I'm curious how valid it would be to use magnetic north to assign 
directions at the geographic north pole. My guess is not very valid, 
but kind of cool nonetheless.
Jason

On Wed, Oct 23, 2013 at 9:30 PM, Sourav Chatterjee <sr...@gm...>wrote:
> Hello,
>
> I have stereographic projection of the pole. I need to indicate the
> directions like north,south,east, west, north-east, north-west and so on.
> Is there any way to do so?
>
> Thanks
> Sourav
>
>
I am **very far** from a GIS expert, but I believe that the cardinal
directions are ambiguous at the poles. In other words, if you're standing
on the North Pole, it'd difficult to head in any direction that's not
towards the south pole.
Curious to hear if I'm wrong, though.
-paul

Unfortunately this issue with the color changing after editing axis
parameters still doesn't appear to have been resolved as of 1.3.1 or in the
latest source. Is there an easy fix for it? It's a very useful feature for
me because my figure is embedded in a QT4 GUI without easy access to the
command line.
--
View this message in context: http://matplotlib.1069221.n5.nabble.com/Qt4Agg-backend-edit-curves-and-axis-parameters-tp10161p42461.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Which backend are you using? With the Mac OS X native backend on OS X Mavericks, I have not seen this warning.
Best,
-Michiel.
--------------------------------------------
On Mon, 10/28/13, Bedartha Goswami <go...@pi...> wrote:
 Subject: [Matplotlib-users] OS X Mavericks: CGContextErase warning
 To: mat...@li...
 Date: Monday, October 28, 2013, 7:23 AM
 
 I installed OS X Mavericks a few days
 ago and I am running Mapllotlib Version 1.3.1.
 Everything works fine except that I get a warning every time
 i use the pyplot.show() command.
 
 here is what it looks like:
 ----
 Python[27325] <Error>: The function `CGContextErase'
 is obsolete and will be removed in an upcoming update.
 Unfortunately, this application, or a library it uses, is
 using this obsolete function, and is thereby contributing to
 an overall degradation of system performance.
 ---
 
 I thought I should ask if this is serious and also if
 something can be done about it.
 
 Best,
 Bedartha
 
 
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 performance.
 Explore tips for MPI, OpenMP, advanced profiling, and more.
 Get the most from 
 the latest Intel processors and coprocessors. See abstracts
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