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Fix simplification of lat-to-lon aspect ratio calculation #125

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Jun 8, 2021
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Fix simplification of lat-to-lon aspect ratio calculation #125

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15 changes: 8 additions & 7 deletions csep/utils/plots.py
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Original file line number Diff line number Diff line change
Expand Up @@ -34,14 +34,14 @@

def plot_cumulative_events_versus_time_dev(xdata, ydata, obs_data, plot_args, show=False):
"""


Args:
xdata (ndarray): time bins for plotting shape (N,)
ydata (ndarray or list like): ydata for plotting; shape (N,5) in order 2.5%Per, 25%Per, 50%Per, 75%Per, 97.5%Per
obs_data (ndarry): same shape as xdata
plot_args:
show:
plot_args:
show:

Returns:

Expand Down Expand Up @@ -581,9 +581,10 @@ def plot_basemap(basemap, extent, ax=None, coastline=True, borders=False, linec
projection = ccrs.PlateCarree()
fig = pyplot.figure()
ax = fig.add_subplot(111, projection=projection)
# Re-aspect plot (only for plain matplotlib plots, or when using PlateCarree)
LATKM = 110.574
ax.set_aspect(111.320 * numpy.cos(numpy.deg2rad(central_latitude)) / LATKM)
# Set plot aspect according to local longitude-latitude ratio in metric units
# (only compatible with plain PlateCarree "projection")
LATKM = 110.574 # length of a ° of latitude [km]; constant --> ignores Earth's flattening
ax.set_aspect(111.320 / LATKM / numpy.cos(numpy.deg2rad(central_latitude)))
else:
fig = pyplot.figure()
ax = fig.add_subplot(111, projection=projection)
Expand Down