淘先锋技术网

首页 1 2 3 4 5 6 7

Python是一种强大的编程语言,可以用于多种应用程序。本文将介绍如何使用Python绘制平面地图。

# 导入必要的库
import matplotlib.pyplot as plt
import numpy as np
# 创建地图
def create_map():
fig, ax = plt.subplots()
ax.set_xlim([-180, 180])
ax.set_ylim([-90, 90])
ax.set_xticks(np.arange(-180, 181, 30))
ax.set_yticks(np.arange(-90, 91, 30))
ax.xaxis.set_ticklabels([])
ax.yaxis.set_ticklabels([])
ax.grid(True, which='both')
return fig, ax
# 绘制国界线
def draw_boundary(ax, boundary_file):
with open(boundary_file, 'r') as f:
boundary_lines = f.readlines()
for line in boundary_lines:
points = line.strip().split(',')
x, y = float(points[0]), float(points[1])
ax.plot(x, y, 'k', linewidth=0.5)
# 绘制城市
def draw_cities(ax, city_file):
with open(city_file, 'r') as f:
city_lines = f.readlines()
for line in city_lines:
city_info = line.strip().split(',')
city_name, city_lon, city_lat = city_info[0], float(city_info[1]), float(city_info[2])
ax.plot(city_lon, city_lat, 'ro', markersize=4)
ax.annotate(city_name, (city_lon, city_lat), fontsize=5)
# 绘制地图
if __name__ == '__main__':
fig, ax = create_map()
draw_boundary(ax, 'boundary.txt')
draw_cities(ax, 'cities.txt')
plt.show()

代码解释:

  • 第2-3行:导入必要的库
  • 第5-23行:创建地图
  • 第25-33行:绘制国界线
  • 第35-44行:绘制城市
  • 第47-54行:绘制地图

使用此代码可绘制出包含国界线和城市的平面地图。