如何使用Python将地图上的多个坐标包含在一个圆内？

import math
import matplotlib.pyplot as plt

def distance(x1, y1, x2, y2):
    return math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)

def get_circle(coordinates):
    # 初始化圆心和半径
    center_x = sum(x for x, _ in coordinates) / len(coordinates)
    center_y = sum(y for _, y in coordinates) / len(coordinates)
    radius = max(distance(center_x, center_y, x, y) for x, y in coordinates)
    return center_x, center_y, radius

def plot_map(coordinates, center_x, center_y, radius):
    # 绘制地图
    for x, y in coordinates:
        plt.plot(x, y, 'ro')
    
    # 绘制圆
    circle = plt.Circle((center_x, center_y), radius, color='b', fill=False)
    plt.gca().add_patch(circle)
    
    # 设置坐标轴范围
    min_x = min(x for x, _ in coordinates) - 1
    max_x = max(x for x, _ in coordinates) + 1
    min_y = min(y for _, y in coordinates) - 1
    max_y = max(y for _, y in coordinates) + 1
    plt.xlim(min_x, max_x)
    plt.ylim(min_y, max_y)
    
    # 显示地图和圆
    plt.show()

if __name__ == "__main__":
    # 假设有三个坐标点
    coordinates = [(1, 1), (2, 2), (3, 3)]
    
    # 获取圆心和半径
    center_x, center_y, radius = get_circle(coordinates)
    
    # 绘制地图和圆
    plot_map(coordinates, center_x, center_y, radius)