Tracks which go through area

from matplotlib import pyplot as plt
import py_eddy_tracker_sample

from py_eddy_tracker.observations.tracking import TrackEddiesObservations

Load experimental atlas, we filter position to have nice display

c = TrackEddiesObservations.load_file(
    py_eddy_tracker_sample.get_demo_path("eddies_med_adt_allsat_dt2018/Cyclonic.zarr")
)
c.position_filter(median_half_window=1, loess_half_window=5)

We extract eddies in the area set below, but we ask to keep full_path

x0, x1, y0, y1 = 3, 4, 37, 38
area = dict(llcrnrlon=x0, llcrnrlat=y0, urcrnrlon=x1, urcrnrlat=y1)
c_subset = c.extract_with_area(area, full_path=True)

Plot

fig = plt.figure(figsize=(12, 5))
ax = fig.add_axes((0.05, 0.05, 0.9, 0.9))
ax.set_xlim(-1, 9)
ax.set_ylim(36, 40)
ax.set_aspect("equal")
ax.grid()
c.plot(ax, color="gray", lw=0.1, ref=-10, label="All tracks ({nb_tracks} tracks)")
c_subset.plot(
    ax, color="red", lw=0.2, ref=-10, label="selected tracks ({nb_tracks} tracks)"
)
ax.plot(
    (x0, x0, x1, x1, x0),
    (y0, y1, y1, y0, y0),
    color="green",
    lw=1.5,
    label="Box of selection",
)
ax.legend()

<matplotlib.legend.Legend object at 0x7f25200e9c00>