Python地图可视化：folium绘制轨迹

folium安装

我是直接使用anaconda prompt安装：pip install folium

绘制路径

folium的坐标系是WGS84坐标系。

import folium
import os
import pandas as pd
import numpy as np


def read_gps_data(path):
    P = pd.read_csv(path, header=None, dtype=np.double).values  # 读取csv文件，输出为narray
    locations_nav = P[:, 0:2].tolist()  # narray转换成list
    locations_true = P[:, 2:4].tolist()
    return locations_nav, locations_true


def draw_gps(locations_nav, locations_true, output_path, file_name):
    """
    绘制gps轨迹图
    :param locations: list, 需要绘制轨迹的经纬度信息，格式为[[lat1, lon1], [lat2, lon2], ...]
    :param output_path: str, 轨迹图保存路径
    :param file_name: str, 轨迹图保存文件名
    :return: None
    """
    m = folium.Map(locations_true[0], zoom_start=30, attr='default')  # 中心区域的确定

    folium.PolyLine(  # polyline方法为将坐标用实线形式连接起来
        locations_true,  # 将坐标点连接起来
        weight=4,  # 线的大小为4
        color='red',  # 线的颜色为红色
        opacity=0.8,  # 线的透明度
    ).add_to(m)  # 将这条线添加到刚才的区域m内

    folium.PolyLine(  # polyline方法为将坐标用虚线形式连接起来
        locations_nav,  # 将坐标点连接起来
        weight=2,  # 线的大小为2
        color='blue',  # 线的颜色为蓝色
        opacity=0.8,  # 线的透明度
        dash_array='5'  # 虚线频率
    ).add_to(m)  # 将这条线添加到刚才的区域m内

    # 起始点，结束点
    folium.Marker(locations_true[0], popup='<b>Starting Point</b>').add_to(m)
    folium.Marker(locations_true[-1], popup='<b>End Point</b>').add_to(m)

    m.save(os.path.join(output_path, file_name))  # 将结果以HTML形式保存到指定路径


if __name__ == '__main__':
    path1 = '../gps/385276_pos.csv'  # 前两列预估值，后两列真值

    locations_nav, locations_true = read_gps_data(path1)
    draw_gps(locations_nav, locations_true, '../drawing', '385276.html')

用浏览器打开html文件：