Example 23b: Overlaying vectors over a rotated pole data plot

TODO describe Example 23 Other

f = cf.read(
    f"cfplot_data/20160601-05T0000Z_INCOMPASS_km4p4_uv_RH_500.nc"
)
r = fl.select_by_identity("long_name=Relative humidity")[0]
u = fl.select_by_identity("eastward_wind")[0]
v = fl.select_by_identity("northward_wind")[0]

cfp.mapset(50, 100, 5, 35)
cfp.levs(0, 90, 15, extend="neither")

cfp.gopen()
cfp.con(r, lines=False)
cfp.vect(u=u, v=v, stride=40, key_length=10)
cfp.gclose()