Re: [Matplotlib-users] Basemap white space

[Filipe P. A. F. <oc...@gm...>]

Thanks Friedrich,

However, my knowledge of python is very limited, even though I think I
understood what you suggested I do not know how to get the shape (of
the figure?) for this part:

>>> fig.set_size_inches(float(shape[0]) / dpi, float(shape[1]) / dpi)

error is:

Traceback (most recent call last):
  File "blueearth-map.py", line 108, in <module>
    fig.set_size_inches(float(shape[0]) / dpi, float(shape[1]) / dpi)
TypeError: 'function' object is unsubscriptable

It seems that it ended up calling a function shape instead of a variable shape.

I'm sending attached the script if you are interested in looking at it.

Thanks again. Filipe.


On Sun, Mar 28, 2010 at 3:35 PM, Friedrich Romstedt
<fri...@gm...> wrote:
>
> 2010/3/28 Filipe Pires Alvarenga Fernandes <oc...@gm...>:
> > Hello list
> > I've trying for a while a "python only" solution to remove white spaces that
> > Basemap generate to keep the aspect ratio. I found these two threads that
> > explain  the issue better:
>
> I think maybe you can make use of the Agg Backend to achieve a
> Python-only solution to obtain a PIL Image from a figure without
> bypassing over the HDD:
>
> Furthemore, if this doesn't work, maybe you can use a StringIO as
> "file", then seek() the StringIO and reread with PIL from the
> "file-like" StringIO, or something like that?
>
> #
> # Render the Figure to a PIL Image ...
> #
>
> # Prepare figure to be of pixel extent *shape* ...
>
> dpi = figure.dpi
> figure.set_size_inches(float(shape[0]) / dpi, float(shape[1]) / dpi)
>
> # Create the rendering Canvas ...
> #
> # We also convert the picture to an RGB string.
>
> canvas = matplotlib.backends.backend_agg.FigureCanvasAgg(figure)
> canvas.draw()
> image_string = canvas.tostring_rgb()
>
> # Create a PIL Image from RGB string ...
>
> image = Image.fromstring("RGB", shape, image_string)
>
> # Now do whatever you want with the Image.
>
> Friedrich