How to use Python and Baidu Map API to implement map trajectory drawing and display functions

How to use Python and Baidu Map API to implement map trajectory drawing and display functions

Introduction:
In modern geographic information systems, map trajectory drawing and display functions are widely used in travel navigation, Logistics tracking and other fields. This article will introduce how to use Python and Baidu Map API to realize the drawing and display functions of map trajectories, and give corresponding code examples.

1. Preparation work
Before we start, we need to do some preparation work:

1. Install the Python development environment. It is recommended to use Anaconda for installation.
2. Register a Baidu Maps developer account and obtain the corresponding developer key (ak).

3. Install related Python libraries: requests, folium.

   Execute the following command in the terminal to install these libraries:

   pip install requests folium

2. Obtain geographical location data
In order to demonstrate this function, we first need to obtain some geographical location data Location data. Taking the simulation of a small cargo logistics system as an example, we can use some virtual data to represent the transportation trajectory of the goods.

The following is an example trajectory data table:

货物编号     经度       纬度
  001     116.4039   39.9152
  002     116.4074   39.9042
  003     116.418    39.9155
  004     116.3972   39.9096
  ...       ...       ...

We save these data in a CSV file to facilitate subsequent reading and processing.

3. Use Baidu Map API to draw map tracks
Next, we will use Baidu Map API to draw map tracks.

First, import the required Python library:

import requests
import folium
import pandas as pd

Then, read the geographical location data and store it as a Pandas data frame:

df = pd.read_csv('轨迹数据.csv')

Next, create a map Object, and set the map center and zoom level:

m = folium.Map(location=[df['纬度'].mean(), df['经度'].mean()], 
               zoom_start=12)

Next, use a loop to draw the trajectory of each point in turn:

for index, row in df.iterrows():
    folium.Marker([row['纬度'], row['经度']]).add_to(m)

Finally, save the map as an HTML file:

m.save('轨迹地图.html')

At this point, we have successfully drawn the map trajectory and saved it as an HTML file.

4. Display map trajectory
We can use any modern web browser to open the generated HTML file to display the map trajectory.

You can also use Python's webbrowser library to automatically open the generated HTML file:

import webbrowser
webbrowser.open('轨迹地图.html')

Summary:
This article introduces how to use Python and Baidu Map API to implement map trajectory drawing and Display function. By obtaining geographical location data, using Baidu Map API to draw trajectory points, and finally saving it as an HTML file and displaying it in a web browser, we can easily draw and display map trajectories.

I hope this article will be helpful to you, welcome to communicate and discuss!

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