Messy conventions for gv.set_map_boundary and latitude sign for SouthPolarStereo projection

[senesis]

Describe the bug
To get a south polar stereo map from lat = -40 to lat = -90, you must call
gv.set_map_boundary(ax, [-180, 180], [ -40, 90])
which is conter-intuitive

To Reproduce

fig = plt.figure(figsize=(8.5,11))
projection = ccrs.SouthPolarStereo()
ax = plt.axes(projection=projection)
ax.add_feature(cfeature.LAND, color='silver',zorder=1)
gv.set_map_boundary(ax, [-180, 180], [ -40, 90])
plt.show();

Expected behavior
Intuitive values for latitudes range should be
gv.set_map_boundary(ax, [-180, 180], [ -90,-40])
but this produces a blank map

And, by the way, the pole latitiude could be implicit for Polar Stereo projections!

OS:
see #210

Environment
see #210

[tingvan]

Ive got the same problem, and I got this message：

AttributeError: module 'geocat.viz.util' has no attribute 'set_map_boundary'

It seems like this function has been removed.

Can someone help us?

[kafitzgerald]

@tingvan it sounds like you're seeing something different with the attribute error. Could you create a new issue with a minimal, reproducible, example to replicate the problem you're seeing. It would be great to see the imports, relevant code snippet, and Python environment info (conda list should give you this information) to help diagnose the problem.

We're looking into the original issue, i.e. making the map_boundary function more intuitive for use with south polar stereo projections.

As mentioned in the original issue, the following code achieves the desired outcome, but the required map_boundary settings are not intuitive:

import geocat.viz as gv
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
import cartopy.feature as cfeature

fig = plt.figure(figsize=(8.5,11))
projection = ccrs.SouthPolarStereo()
ax = plt.axes(projection=projection)
ax.add_feature(cfeature.LAND, color='silver',zorder=1)
gv.set_map_boundary(ax, [-180, 180], [ -40, 90])
plt.show()