Re: [Matplotlib-users] Get contourf image as array

[Joy m. m. <joy...@gm...>]

pardon the query if it seems dumb, but why don't you do a savefig()
after plotting the data and then convert it to any format you like?

alternatively, contour() and contourf() both create paths that can
be accessed:

cf = contourf(.....)

output = cf.collections.pop()
paths = output.get_paths()[i] # for the various contours

the x,y coordinates can then be accessed as

xcoords = paths.vertices.transpose()[0]
ycoords = paths.vertices.transpose()[1]

you can then do whatever you wish with them.

Joy


On Wed, Oct 15, 2014 at 9:11 PM, David Hoese <dh...@gm...> wrote:

> I've been searching and reading through source code and google searches
> to see if this is possible, but no luck so far. I'm basically trying to
> map some data using Basemap, use contourf to map it to an image, and
> then put that image in a geotiff (or other format) for use in other GIS
> programs. I have other tools for remapping data and creating geotiffs,
> but the contour image looks better. All I would need to get this to work
> would be an array representing the image inside the axes of a contourf
> plot. I found a lot of geotiff -> Basemap png results, but I would like
> the reverse.
>
> Since the plots are made using paths/patches I'm guessing I would have
> to have a backend render the image and then extract the image somehow.
> Does anyone have some tips or tricks to do something like this? Or am I
> thinking about this completely wrong?
>
> Thanks for any help and if you could CC me in any replies it would be
> much appreciated.
>
> -Dave
>
>
> ------------------------------------------------------------------------------
> Comprehensive Server Monitoring with Site24x7.
> Monitor 10 servers for $9/Month.
> Get alerted through email, SMS, voice calls or mobile push notifications.
> Take corrective actions from your mobile device.
> http://p.sf.net/sfu/Zoho
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>



-- 
The best ruler, when he finishes his
tasks and completes his affairs,
the people say
“It all happened naturally”

                                         - Te Tao Ch'ing