Thanks Ben. I'll take a look through the archive. On 10/16/14, 9:43 AM, Benjamin Root wrote: > What you are looking for is called "rasterization". Matplotlib does this > deep within the codebase and is not accessible (believe me, I tried). > However, there have been other discussions in this mailing list about > how to use GDAL to rasterize a set of polygons (represented as paths), > including some links to stack-overflow questions. It isn't a complete > end-to-end solution, but the pieces are there. > > Cheers! > Ben Root > > > On Wed, Oct 15, 2014 at 2:09 PM, David Hoese <dho...@gmail.com > <mailto:dho...@gmail.com>> wrote: > > For the first question, if I save the figure (as a PNG I'm guessing, > unless you can save into a more array-like format), I'd have to make > sure that there were no labels or ticks and that the axes fit the whole > figure. I'd also have to get the dpi and size information correct, but I > suppose it would be possible that way. I was hoping for something a > little easier and in-memory. This might be the simplest answer the more > I think about it. > > If I'm starting from the paths, I'd still have to write them to the > "grid" array. I thought maybe the backend could do that and I magically > get the image. > > I'll look in to using savefig and getting the data out. > > -Dave > > On 10/15/14, 12:42 PM, Joy merwin monteiro wrote: > > 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 <dho...@gmail.com > <mailto:dho...@gmail.com> > > <mailto:dho...@gmail.com <mailto:dho...@gmail.com>>> 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 > > Matplotlib-users@lists.sourceforge.net > <mailto:Matplotlib-users@lists.sourceforge.net> > > <mailto:Matplotlib-users@lists.sourceforge.net > <mailto:Matplotlib-users@lists.sourceforge.net>> > > 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 > > > ------------------------------------------------------------------------------ > 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 > Matplotlib-users@lists.sourceforge.net > <mailto:Matplotlib-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > >
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