On 10/10/12 7:16 PM, klo uo wrote: > On Wed, Oct 10, 2012 at 11:28 PM, Jeff Whitaker wrote: >> I wonder whether it would be better to use OWSlib >> (http://geopython.github.com/OWSLib/) for OGS/WMS support, instead of trying >> to roll our own solution. It only has ElementTree as a dependency. Klo - >> would you be interested in rewriting your wmsimage method using OWSlib? I >> bet it would simplify the code quite a bit. > > Hi Jeff, > > that's good idea :D > But really, OWSlib is very small package that doesn't depend on > anything so why rewrite, right? > > I installed it and played with it shortly. It provides all sorts of > useful functions for WMS service and it can return HTTPmessage > suitable for writing to file object, but not for imshow()/imread() as > it's chunked encoded, as I mentioned in that gist sample. So my > suggestion is we just use warpimage() and handle WMS that way, as > warpimage() uses temp file with urlretrieve(). Although we can use > cStringIO and avoid temp file. > > So user handles WMS through OWSLib the way he likes and then passes it > to warpimage() like this (taken from docs): > > ======================================== > m = Basemap(...) > img = wms.getmap(layers=['global_mosaic'], > styles=['visual_bright'], > srs='EPSG:4326', > bbox=(-112, 36, -106, 41), > size=(300, 250), > format='image/jpeg' > ) > > m.warpimage(image=img.url) > ======================================== > > where obviously wms in OWSLib WebMapService class instance Klo:
But warpimage assumes the image is of global extent - perhaps we could make warpimage smart enough to get the georeferencing from the wms instance but that would require some work. There must be some way to let the WMS server do the image warping and convert the result to something imshow can read - perhaps by writing to a png file (or CStringIO instance) and then reading it back in with imread? -Jeff ------------------------------------------------------------------------------ Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
