mapa BLC con flechas

arrow_BLC.py

from math import atan
import folium, pandas as pd

viajes = pd.read_html('http://quant.cl/blc_read')[0]

fm = folium.Map(location=[-33.41,-70.59], zoom_start=14, 
                width=1000, height=400, tiles='stamenwatercolor')

for idx, row in viajes.iterrows():
    fromloc, toloc = eval(row['fromloc']), eval(row['toloc'])      # viene como "string"
    angulo = 90*atan((fromloc[0]-toloc[0])/(fromloc[1]-toloc[1]))  # trigonometría: tan=opp/adj
    speed = row['speed']
    color = 'green' if speed>12 else 'yellow' if speed>8 else 'red'
    folium.PolyLine([fromloc,toloc], color=color).add_to(fm)
    folium.RegularPolygonMarker(location=toloc, fill_color='blue', 
                                number_of_sides=3, radius=10, 
                                rotation=angulo).add_to(fm)