def __init__(self, mapdata):
'''initialize a SubwayMap object
Args:
mapdata (SubwayMapData): container-class for stations and lines dataframes with implemented observer pattern.
This is necessary for data binding of the view to the viewmodel.
'''
Stream.__init__(self)
#create an initial map
stations, lines = mapdata.stationsdf, mapdata.linesdf
self.pipe = Pipe(data=[])
self.subway_map = gv.Path(lines, vdims=['color']).opts(
projection=crs.LambertConformal(),
height=800,
width=800,
color='color') * gv.DynamicMap(self.callback, streams=[self.pipe])
self.pipe.send(stations)
#bind changes in the stationsdf to pipe.send
mapdata.bind_to_stationsdf(self.pipe.send)
self.mapdata = mapdata
def __init__(self, stations):
self.default_departure_station = 'Zürich HB'
self.default_arrival_station = 'Zürich, Auzelg'
self.default_departure_id = id_from_name(
stations, self.default_departure_station)
self.default_arrival_id = id_from_name(stations,
self.default_arrival_station)
zurich = stations.loc[self.default_departure_id]
self.stations = stations
self.station_names = list(self.stations['station_name'])
self.default_arrival_time = datetime.datetime.fromisoformat(
'2019-05-06 12:30:00')
self.default_min_success_probability = 0
self.tiles = gv.tile_sources.CartoLight()
self.unselected_hover = HoverTool(tooltips=[('', '@station_name')])
self.departure_hover = HoverTool(tooltips=[('Departure Station',
'@station_name')])
self.arrival_hover = HoverTool(tooltips=[('Arrival Station',
'@station_name')])
self.departure_station_widget = pn.widgets.AutocompleteInput(
name='Departure Station',
value=self.default_departure_station,
options=self.station_names)
self.arrival_station_widget = pn.widgets.AutocompleteInput(
name='Arrival Station',
value=self.default_arrival_station,
options=self.station_names)
self.arrival_time_widget = pn.widgets.DatetimeInput(
name='Arrival Time', value=self.default_arrival_time)
self.min_probability_widget = pn.widgets.FloatSlider(
name='Minium Success Probability',
start=0.0,
end=1.0,
value=self.default_min_success_probability)
self.departure_tap_stream = hv.streams.SingleTap(
x=stations.loc[self.default_departure_id, 'lat'],
y=stations.loc[self.default_departure_id,
'lon']).rename(x='departure_lat', y='departure_lon')
self.arrival_tap_stream = hv.streams.DoubleTap(
x=stations.loc[self.default_arrival_id, 'lat'],
y=stations.loc[self.default_arrival_id,
'lon']).rename(x='arrival_lat', y='arrival_lon')
self.departure_tap_stream.add_subscriber(
lambda departure_lat, departure_lon: set_to_closest_station(
self.stations, self.departure_station_widget, departure_lat,
departure_lon))
self.arrival_tap_stream.add_subscriber(
lambda arrival_lat, arrival_lon: set_to_closest_station(
self.stations, self.arrival_station_widget, arrival_lat,
arrival_lon))
self.departure_station_widget.link(
self.departure_tap_stream,
callbacks={'value': self._update_stream})
self.arrival_station_widget.link(
self.arrival_tap_stream, callbacks={'value': self._update_stream})
self.station_map = gv.DynamicMap(
self._station_map(),
streams=[self.departure_tap_stream, self.arrival_tap_stream])
self.widgets = pn.Column(self.departure_station_widget,
self.arrival_station_widget,
self.arrival_time_widget,
self.min_probability_widget)
self.interface = pn.Row(pn.Spacer(height=600),
pn.Column(self.widgets, max_width=400),
self.station_map)
def view(self):
return (gv.DynamicMap(self.callback) * self.boxes).options(active_tools=['wheel_zoom'])
def get_timeseries(source, data, dataset, ymin, ymax, fmt):
'''
get time series plots
'''
#initialize timeseries_data
if data.init is False:
#find the maximum side length
x, y = dataset['SCHISM_hgrid_node_x'].data, dataset[
'SCHISM_hgrid_node_y'].data
e1, e2, e3 = dataset['SCHISM_hgrid_face_nodes'].data.T
s1 = abs((x[e1] - x[e2]) + 1j * (y[e1] - y[e2])).max()
s2 = abs((x[e2] - x[e3]) + 1j * (y[e2] - y[e3])).max()
s3 = abs((x[e3] - x[e1]) + 1j * (y[e3] - y[e1])).max()
#save data
data.sx, data.sy, data.x0, data.y0 = x, y, x.mean(), y.mean()
data.mdist = np.max([s1, s2, s3])
data.time = dataset['time'].data
data.xys = []
data.elev = []
data.curve = []
data.init = True
def get_plot_point(x, y):
if None not in [x, y]:
add_remove_pts(x, y, data, dataset, fmt)
if ((x is None) or (y is None)) and len(data.xys) == 0:
xys = [(data.x0, data.y0)]
hpoint = gv.Points(xys).opts(show_legend=False, visible=False)
htext = gv.HoloMap({
i: gv.Text(*xy, '{}'.format(i + 1)).opts(show_legend=False,
visible=False)
for i, xy in enumerate(xys)
}).overlay()
else:
xys = data.xys
hpoint = gv.Points(xys).opts(color='r', size=3, show_legend=False)
htext = gv.HoloMap({
i: gv.Text(*xy, '{}'.format(i + 1)).opts(show_legend=False,
color='k',
fontsize=3)
for i, xy in enumerate(xys)
}).overlay()
return hpoint * htext
def get_plot_curve(x, y):
mdist, mdata = extract_timeseries(x, y, data.sx, data.sy, dataset)
if mdist > data.mdist:
mdata = mdata * np.nan
hdynamic = hv.Curve((data.time, mdata)).opts(color='k',
line_width=2,
line_dash='dotted')
hcurve = hv.HoloMap({
'dynamic': hdynamic,
**{(i + 1): k
for i, k in enumerate(data.curve)}
}).overlay()
return hcurve
hpoint = gv.DynamicMap(get_plot_point,
streams=[DoubleTap(source=source, transient=True)])
hcurve = gv.DynamicMap(get_plot_curve,
streams=[
PointerXY(x=data.x0, y=data.y0, source=source)
]).opts(height=400,
legend_cols=len(data.xys) + 1,
legend_position='top',
ylim=(float(ymin), float(ymax)),
responsive=True,
align='end',
active_tools=["pan", "wheel_zoom"])
return hpoint, hcurve
def map_view(self):
return self.tiles * gv.DynamicMap(self.update_map_values)
def view(self):
warnings.warn(
'WMTS class is deprecated and will be removed in a future release.'
)
return gv.DynamicMap(self.element)
def explore(
cyclonic=None,
anticyclonic=None,
hover_info=["segment", "track"],
tiles=None,
background_func=None,
dynamic=False,
date_widget="calendar",
):
"""explore NetworkObservations of cyclonic and/or anticyclonic
:param cyclonic: cyclonic dataset, defaults to None
:type cyclonic: :py:class:`~py_eddy_tracker.observations.network.NetworkObservations`, optional
:param anticyclonic: anticyclonic dataset, defaults to None
:type anticyclonic: :py:class:`~py_eddy_tracker.observations.network.NetworkObservations`, optional
:param hover_info: list of data to show on hover, defaults to ["segment", "track"]
:type hover_info: list, optional
:param tiles: if specified, plot data over web tiles. like :py:class:`geoviews.source_tiles.EsriImagery`, defaults to None
:type tiles: :py:class:`geoviews.element.geo.WMTS`, optional
:param background_func: python function, takes as param a date and return a `xr.Dataset`, defaults to None
:type background_func: callable, optional
:param dynamic: if True, use :py:class:`~holoviews.operation.datashader.regrid` to delay plot of `background_func`, defaults to False
:type dynamic: bool, optional
:param date_widget: widget for date. if not calendar, it will be a radio, defaults to "calendar"
:type date_widget: str, optional
:return: bokeh plot
.. note::
the param `background_func` should return a :py:class :`~xarray.Dataset` with variables "lon", "lat"
and "Grid_0001" for the data.
The name of data should be on attribute "long_name" of Grid_0001, and "units" if wanted
example of function :
.. code-block:: python
def date2dataset(date):
fichier = f"/tmp/global_{date.strftime('%Y%m%d')}.nc"
with xr.open_dataset(fichier) as ds:
ds = ds.rename({"longitude": "lon", "latitude": "lat", "adt": "Grid_0001"})
ds.Grid_0001.attrs["long_name"] = "adt
ds['lon'] = np.where(ds.lon > 180, ds.lon - 360, ds.lon)
ds = ds.sortby("lon").load()
return ds
"""
if cyclonic is None and anticyclonic is None:
raise NotImplementedError("please specify cyclonic or anticyclonic")
# if cyclonic or anticyclonic is not declared, only use one
datasets = [(d, color)
for d, color in [(cyclonic,
"deepskyblue"), (anticyclonic, "red")]
if d is not None]
# compute every date with data
datasets_unique = [np.unique(d.time) for d, _ in datasets]
unique = np.unique(np.concatenate(datasets_unique))
if date_widget == "calendar":
now = datetime.date(1950, 1, 1) + datetime.timedelta(int(unique[0]))
pn_date = pn.widgets.DatePicker(
name="date",
value=now,
width=200,
enabled_dates=(np.datetime64("1950-01-01") +
unique.astype("timedelta64[D]")).tolist(),
)
widget_date = pn_date
else:
pn_date = pn.widgets.DiscretePlayer(name="date",
options=unique.tolist(),
value=unique[0])
@pn.depends(pn_date_value=pn_date.param.value)
def plot_date(pn_date_value):
return pn.pane.HTML(
f"<h1>date = {np.datetime64('1950-01-01')+np.timedelta64(pn_date_value)}</h1>"
)
widget_date = pn.Row(pn_date, plot_date)
@pn.depends(pn_date_value=pn_date.param.value)
def update_all(pn_date_value):
if isinstance(pn_date_value, datetime.date):
# si on a choisi le widget DatePicker
pn_date_value = (pn_date_value - datetime.date(1950, 1, 1)).days
hv_polygons = []
hv_exterieur = []
for (d, color), d_unique in zip(datasets, datasets_unique):
mask = d.time == pn_date_value
sub_lon = ((d.contour_lon_s[mask] + 180) % 360) - 180
sub_lat = d.contour_lat_s[mask]
sub_data = np.moveaxis(np.array([sub_lon, sub_lat]), [0], [2])
polygons = [Polygon(poly) for poly in sub_data]
dct_data = {name: d[name][mask] for name in hover_info}
dct_data["geometry"] = polygons
gpd = geopandas.GeoDataFrame(dct_data)
opts_common = dict(responsive=True)
hv_polygons.append(
gv.Polygons(gpd, vdims=hover_info).opts(line_color=color,
**opts_common))
sub_lon = ((d.contour_lon_e[mask] + 180) % 360) - 180
sub_lat = d.contour_lat_e[mask]
_lon = flatten_line_matrix(sub_lon)
_lat = flatten_line_matrix(sub_lat)
hv_exterieur.append(
gv.Path([np.array([_lon, _lat]).T]).opts(color=color,
alpha=0.70,
line_dash="dashed",
**opts_common))
return gv.Overlay([*hv_polygons, *hv_exterieur]).opts(responsive=True,
tools=["hover"])
if background_func is not None:
@pn.depends(pn_date_value=pn_date.param.value)
def update_fond(pn_date_value):
if isinstance(pn_date_value, datetime.date):
# si on a choisi le widget DatePicker
date = pn_date_value
else:
date = datetime.datetime(
1950, 1, 1) + datetime.timedelta(days=int(pn_date_value))
ds = background_func(date)
info = ds.Grid_0001.units if hasattr(ds.Grid_0001, "units") else ""
return gv.Image(
(ds.lon, ds.lat, ds.Grid_0001.T),
kdims=["lon", "lat"],
vdims=[ds.Grid_0001.long_name],
).opts(responsive=True, tools=["hover"], clabel=info)
if dynamic:
fond = regrid(hv.DynamicMap(update_fond)).opts(height=500,
responsive=True)
else:
fond = hv.DynamicMap(update_fond).opts(responsive=True)
if tiles is not None:
visu = gv.Overlay([
tiles,
fond,
gv.DynamicMap(update_all),
]).collate()
else:
visu = gv.Overlay([
fond,
gv.feature.land(scale="50m").opts(
responsive=True, line_color="black",
fill_color="darkgray"), # , data_aspect=0.7),
gv.DynamicMap(update_all),
]).collate()
return pn.Column(widget_date,
visu,
sizing_mode="stretch_both",
min_height=600,
min_width=400)
else:
if tiles is not None:
visu = gv.Overlay([tiles, gv.DynamicMap(update_all)]).collate()
else:
visu = gv.Overlay([
gv.feature.land(scale="50m").opts(
responsive=True,
line_color="black",
fill_color="darkgray",
data_aspect=1,
),
gv.DynamicMap(update_all),
]).collate()
return pn.Column(widget_date,
visu,
sizing_mode="stretch_both",
min_height=600,
min_width=400)
def view(self):
return (gv.DynamicMap(self.callback) * self.boxes)
def update_tiles(self):
return self.tiles * gv.DynamicMap(self.update_poly)
