Patrick Marsh wrote: > Thanks for the quick reply. > > I may not have been totally clear on what I'm trying to save (or I > totally misunderstood what you were trying to say - which is certainly > possible). > > I'm not wanting to save the lat, lon pairs from the map projection. > I'm trying to save the lat, lon pairs of the contour. Using my > original example, if I'm plotting winds every 5 m/s, I'm wanting to > pull off the lat, lon pairs for the 5 m/s contours.
Patrick: I know - that's what I was trying to explain. You can get the x,y coordinates of the *contours* from the collections attribute of the ContourSet object returned by contour. Then you convert those x,y values back to lon,lat values using the Basemap instance. -Jeff > > I'll check out the website and see if I find anything there. > > -Patrick > > > > On Sat, Aug 2, 2008 at 6:13 PM, Jeff Whitaker <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > Patrick Marsh wrote: > > Hi Everyone, > > First email here... > > I am plotting meteorological data using matplotlib and > basemap - and can do this just fine. However, I would > like to backout the coordinates being used for the > contours that are plotted. > > For example, if I were to contour windspeed every 5 m/s > and plot this (which I can do just fine), I would like to > save a copy of the lat, lon pairs as a text file. > However, I cannot for the life of me figure out how to do > this. I have a feeling it is pretty simple and I'm just > over looking something that can do this. Any help would > be appreciated. > > Thanks, > > -Patrick Marsh > Graduate Student > School of Meteorology > University of Oklahoma > > > Patrick: contour and contourf return a ContourSet object. > ContourSet.collections is a matplotlib LineCollection (for > contour) or a PolyCollection (for contourf). You can retrieve > the x,y (map projection) coordinates from these, and transfer > them back to lat/lon coordinates using the Basemap instance via > > lons,lats = map(x,y,inverse=True) # map is a Basemap instance. > > See > http://matplotlib.sourceforge.net/doc/html/api/collections_api.html > for more info on matplotlib collection objects. > > HTH, > -Jeff > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move > Developer's challenge > Build the coolest Linux based applications with Moblin SDK > & win great prizes > Grand prize is a trip for two to an Open Source event > anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > <http://moblin-contest.org/redirect.php?banner_id=100&url=/> > > ------------------------------------------------------------------------ > > _______________________________________________ > Matplotlib-users mailing list > [email protected] > <mailto:[email protected]> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > > > > -- > Jeffrey S. Whitaker Phone : (303)497-6313 > NOAA/OAR/CDC R/PSD1 FAX : (303)497-6449 > 325 Broadway Boulder, CO, USA 80305-3328 > > > -- Jeffrey S. Whitaker Phone : (303)497-6313 NOAA/OAR/CDC R/PSD1 FAX : (303)497-6449 325 Broadway Boulder, CO, USA 80305-3328 ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Matplotlib-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/matplotlib-users
