On 2012/12/11 1:24 PM, Timothy Duly wrote: > Thanks Eric, this did the trick. I did not know such a thing existed. > Why "4"?
I don't remember exactly what the defaults are for different types of artist, and didn't want to take the time to look, but I think they are all less than 4. So I just picked that as a value that would do the job. Eric > > Tim > > > On Tue, Dec 11, 2012 at 4:35 PM, Eric Firing <efir...@hawaii.edu > <mailto:efir...@hawaii.edu>> wrote: > > On 2012/12/11 12:16 PM, Timothy Duly wrote: > > Hi, > > > > I'm running into a problem with overlaying a scatter plot on a > polygon > > that is on a Basemap. The polygon covers up the scatter plot > created by > > the basemap. To show the issue, the simple example below and broken > > down into three steps: 1) creating the map, 2) adding the red > polygon, > > and 3) adding the "x" markers via a scatter plot. You will see > that the > > "x" markers are not on top of the polygon. > > > > Why does the polygon cover up the markers, even though I have the > > markers added after the polygon? Would there be a better way to do > > this? I could set the polygon alpha to, say, 0.5, but this > feature does > > not show when I save it as an eps image. Therefore, I would like to > > keep alpha=1. > > Artists have a zorder attribute that controls the drawing order. Try > adding the kwarg zorder=4 to your scatter call. I think that will take > care of it. (Alternatively you could lower the zorder of the polygon.) > > Eric > > > > > Thanks, > > Tim > > > > from mpl_toolkits.basemap import Basemap > > import numpy as np > > from matplotlib.pyplot import * > > from matplotlib.patches import Polygon > > > > > > # --------------------- > > # Part 1: Draw the map > > # --------------------- > > > > # Hawaii: > > lat_0 = 20.71-8. > > lon_0 = 203.83 > > > > figure(1); clf(); > > m = Basemap(width=2500e3,height=2500e3, > > resolution='l',projection='stere', \ > > lat_ts=lat_0,lat_0=lat_0,lon_0=lon_0) > > > > m.drawcoastlines() > > m.fillcontinents(color='coral',lake_color='aqua') > > > > # draw parallels and meridians: > > m.drawmapboundary(fill_color='aqua') > > > > lats = np.arange(np.floor(m.latmin),np.ceil(m.latmax),2.) > > lons = np.arange(190.,211.,5.) > > m.drawparallels(lats,labels=[True,False,False,False]) > > m.drawmeridians(lons,labels=[False,False,False,True]) > > > > draw(); show() > > > > # --------------------- > > # Part 2: Add a polygon > > # --------------------- > > > > lon_poly = np.array([-160., -150., -150., -160.,]) > > lat_poly = np.array([10., 10., 14., 14.,]) > > X, Y = m(lon_poly, lat_poly) > > xy = np.vstack([X,Y]).T > > > > poly = Polygon(xy, closed=True, \ > > facecolor='red', \ > > linewidth=1., \ > > ) > > > > gca().add_patch(poly) > > > > # --------------------- > > # Part 3: add some 'x' markers > > # --------------------- > > > > lon_markers = np.arange(-168.,-144.,2.) > > lat_markers = np.arange(5.,20.,1.) > > X, Y = np.meshgrid(lon_markers, lat_markers) > > > > x, y = m(X.ravel(), Y.ravel()) > > m.scatter(x,y,marker='x') > > > > draw(); show() > > > > > > > > > > ------------------------------------------------------------------------------ > > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > > Remotely access PCs and mobile devices and provide instant support > > Improve your efficiency, and focus on delivering more value-add > services > > Discover what IT Professionals Know. Rescue delivers > > http://p.sf.net/sfu/logmein_12329d2d > > > > > > > > _______________________________________________ > > Matplotlib-users mailing list > > Matplotlib-users@lists.sourceforge.net > <mailto:Matplotlib-users@lists.sourceforge.net> > > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > > > > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > <mailto:Matplotlib-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
