有没有可能在叶子上做一个椭圆？

Question

我在网上看到folium在地图上生成一个椭圆形的图片，是否可以，我尝试手动创建但是每个点都是不可见的，有什么办法可以做到吗？ elipse on folium

Answer 1

是的，通过使用 folium 的多边形（和其他一些东西）

我为多边形构造复制了这个

import math
from shapely.geometry import Point
from shapely.affinity import scale, rotate

#input parameters
A = Point(-95.5, 41.25)
B = Point(-96.5, 41.25)
R = .25

d = A.distance(B)

#first, rotate B to B' around A so that |AB'| = |AB| and B'.y = A.y
#and then take S as midpoint of AB'
S = Point(A.x + d/2, A.y)

#alpha represents the angle of this rotation
alpha = math.atan2(B.y - A.y, B.x - A.x)

#create a circle with center at S passing through A and B'
C = S.buffer(d/2)

#rescale this circle in y-direction so that the corresponding
#axis is R units long
C = scale(C, 1, R/(d/2))

#rotate the ellipse obtained in previous step around A into the
#original position (positive angles represent counter-clockwise rotation)
C = rotate(C, alpha, origin = A, use_radians = True)

其中 C 是一个匀称的多边形

print(type(C))
<class 'shapely.geometry.polygon.Polygon'>

我将坐标从 X,Y 翻转到 Y,X 以使其对叶子友好

folium_poly = [[y,x] for x,y in C.exterior.coords]

剩下的就是叶

import folium

m = folium.Map([C.centroid.y, C.centroid.x])
folium.Polygon(folium_poly).add_to(m)
m

有没有可能在叶子上做一个椭圆？

Is it possible to make a elipse on folium?

python

leaflet

folium