Adam Mercer wrote: > On 09/10/2007, Jeff Whitaker <[EMAIL PROTECTED]> wrote: > > >> Adam: If you can convert your coordinates into latitudes and >> longitudes, then you can plot the data with the basemap tookit on your >> choice of map projection (see >> http://www.scipy.org/Cookbook/Matplotlib/Maps for an example). >> > > Following that example I'm running into a few problems, this is the code I > have: > > map = > Basemap(projection='ortho',lat_0=50,lon_0=-100,resolution='l',area_thresh=1000.) > map.drawmeridians(pylab.arange(0,360,30)) > map.drawparallels(pylab.arange(-90,90,30)) > map.contour(lat, lon, values) > > where lat is an array of the latitude, lon the corresponding latitude > and values the value of the quantity I want to plot, this results in > the error: > > Traceback (most recent call last): > File "./plot_skymap.py", line 54, in ? > map.contour(lat, lon, values) > File > "/opt/local/lib/python2.4/site-packages/matplotlib/toolkits/basemap/basemap.py", > line 2484, in contour > xx = x[x.shape[0]/2,:] > IndexError: too many indices > > Can anyone give me any pointers, on what the problem is here? > > Cheers > > Adam > Adam: If lat and lon are 2D arrays containing the lats and lons of the grid in degrees, you first need to convert to map projection coordinates using the map instance:
x,y = map(lons, lats) (if lons and lats are 1D, you can use pylab.meshgrid to make them 2D first) Then you pass contour the x, y values map.contour(x,y,values) For filled contours use contourf. Are you sure you want an orthographic projection? I thought sky maps used a stereographic projection (http://www.progonos.com/furuti/MapProj/Normal/ProjAppl/projAppl.html). -Jeff -- 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: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
