方位角，画一条线

Question

我正在尝试使用大叶草在地图上绘制给定的坐标的方位角。我是python的新手，我迷路了。 目的是获取坐标和度并将其绘制到地图上。 我正在尝试使用大叶草，但不一定是大叶草。

import folium

# criar o objeto do mapa
m = folium.Map(location=[37.0431575, -7.8449655], zoom_start=14)

# Texto que vai aparecer no marcador
tootip = "Célula em Olhão"

folium.CircleMarker(
    location=[37.040893, -7.83197],
    radius=4,
    popup="célula",
).add_to(m)

# posicao = folium.RegularPolygonMarker(
#     location=[37.040893, -7.83197],
#     fill_color='blue',
#     number_of_sides=3,
#     radius=10,
#     rotation=45).add_to(m)
# I TRIED WITH A TRIANGULE BUT I COULDN'T UNDERSTANT WICH PART WAS 
# POINTING AT THE DESIRED DIRECTION

m.save("mapa.html")

我怎样才能从45度的圆弧开始画一条线？行的大小并不重要，只需要可见即可。  谢谢

Answer 1

像这样吗？

使用的帮助math，并一些TRIG

import folium
import math

# criar o objeto do mapa
m = folium.Map(location=[37.0431575, -7.8449655], zoom_start=14)

# Texto que vai aparecer no marcador
tootip = "Célula em Olhão"

origin_point = [37.040893, -7.83197]

folium.CircleMarker(
    location=origin_point,
    radius=4,
    popup="célula",
).add_to(m)

length = .01
angle = 45

end_lat = origin_point[0] + length * math.sin(math.radians(angle))
end_lon = origin_point[1] + length * math.cos(math.radians(angle))

folium.PolyLine([origin_point, [end_lat, end_lon]]).add_to(m)

m