class NYCTaxiExplorer(hv.streams.Stream):
alpha = param.Magnitude(default=0.75,
doc="Alpha value for the map opacity")
colormap = param.ObjectSelector(default=cm_n["fire"],
objects=cm_n.values())
hour = param.Integer(default=None,
bounds=(0, 23),
doc="All hours by default; drag to select one hour")
passengers = param.Range(default=(0, max_pass), bounds=(0, max_pass))
location = param.ObjectSelector(default='dropoff',
objects=['dropoff', 'pickup'])
def make_view(self, x_range, y_range, **kwargs):
map_tiles = tiles.opts(style=dict(alpha=self.alpha), plot=options)
points = hv.Points(df, [self.location + '_x', self.location + '_y'],
self.location + '_hour')
selection = {
self.location + "_hour": self.hour if self.hour else (0, 24),
"passenger_count": self.passengers
}
taxi_trips = datashade(points.select(**selection),
x_sampling=1,
y_sampling=1,
cmap=self.colormap,
dynamic=False,
x_range=x_range,
y_range=y_range,
width=1000,
height=600)
return map_tiles * taxi_trips
class OSMExplorer(hv.streams.Stream):
alpha = param.Magnitude(default=0.75, doc="Map opacity")
colormap = param.ObjectSelector(default=cm_n["fire"],
objects=cm_n.values())
def make_view(self, x_range, y_range, **kwargs):
tiles = map_tiles.options(alpha=self.alpha, **opts1)
points = hv.Points(df, ['x', 'y'])
return tiles * datashade(points,
cmap=self.colormap,
x_range=x_range,
y_range=y_range,
**opts2)
class ColormapPicker(hv.streams.Stream):
colormap = param.ObjectSelector(default=cm_n["fire"],
objects=cm_n.values())
