[Matplotlib-users] [basemap] stereographic projection bounding boxes

I've been playing around with stereographic projections, and it appears
that the bounding-box for the 'stere' projection isn't computed. Being
blissfully unaware of all the complexities involved, I thought I'd send
this email to see if there's an easy way to deal with the situation.

Basically, I'm trying to plot on an equatorial stereographic projection
created like so:

m=Basemap(projection='stere', lat_ts = 0.0, lat_0 = 0, lon_0 = 90.0)

This creates a projection that seems to work well, but the problem is
that the [ll|ur]crn* attributes aren't set to anything useful, meaning
that lots of the nice basemap goodies aren't working (drawmeridians, etc.)

(Note: I don't really understand what the lat_ts is doing -- the
docstring says it is the "natural origin". I can't find reference to
this at http://en.wikipedia.org/wiki/Stereographic_projection . I guess
this is related to the discussion of "scale error at the extremities"
at 
http://www.remotesensing.org/geotiff/proj_list/oblique_stereographic.html
, and thus I assume that if lat_ts is set to lat_0, the scale factor
will be 1 at the point of tangency. )

So, the question is, can some default bounding box be computed for
equatorial (and possibly oblique) stereographic projections in any
reasonable way? It would be nice to make plots like those found on the
wikipedia page.

Cheers!
Andrew