How to add and edit map points using Python and Baidu Map API?

How to add and edit map points using Python and Baidu Map API?

With the development of the Internet and geographic information technology, map applications play an increasingly important role in our lives. For developers, how to use Python and Baidu Map API to add and edit map points has become a necessary skill. This article will introduce how to use Python and Baidu Map API to implement this function, and provide relevant code examples for reference.

First of all, we need to understand the basic concepts and usage of Baidu Map API. Baidu Map API is a set of development interfaces provided by Baidu, which allows developers to embed map functions in their applications. Before using the Baidu Map API, we need to apply for a developer key. For specific application steps, please refer to the official documentation of Baidu Map Open Platform.

1. Add a map marker point
To add a marker point on the map, we need to call the addOverlay method of Baidu Map API and pass in the latitude and longitude coordinates and related attributes of the marker point.

The following is a sample code for adding label points using Python and Baidu Map API:

import requests

def add_marker(lng, lat, label):
    url = "http://api.map.baidu.com/geoconv/v1/?coords=" + str(lng) + "," + str(lat) + "&from=1&to=5&ak=your_api_key"
    response = requests.get(url)
    result = response.json()
    converted_lng = result['result'][0]['x']
    converted_lat = result['result'][0]['y']

    url = "http://api.map.baidu.com/trace/v2/track/addpoint"
    data = {
        "ak": "your_api_key",
        "service_id": "your_service_id",
        "point_list": converted_lng + "," + converted_lat + ";" + label,
        "coord_type_output": "bd09ll"
    }
    response = requests.post(url, data=data)
    result = response.json()

    if result['status'] == 0:
        print("标注点添加成功！")
    else:
        print("标注点添加失败！")

if __name__ == "__main__":
    lng = 116.404
    lat = 39.915
    label = "这是一个标注点"

    add_marker(lng, lat, label)

In the above code, we first convert the longitude and latitude coordinates into the coordinate system of Baidu Map, and then call Use the addpoint method of Baidu Map API to add annotation points. When calling the API, we need to pass in the API key we applied for and related parameters, such as service_id and coord_type_output, etc. After the annotation point is added successfully, the API will return a result. We can judge whether the addition is successful based on the status field of the result.

2. Edit map annotation points
If you need to edit an added annotation point, we can call the updatePoint method of Baidu Map API and pass in the id and new attribute value of the annotation point to be modified.

The following is a sample code for editing annotation points using Python and Baidu Map API:

import requests

def update_marker(point_id, new_label):
    url = "http://api.map.baidu.com/trace/v2/track/updatepoint"
    data = {
        "ak": "your_api_key",
        "service_id": "your_service_id",
        "point_id": point_id,
        "point_list": new_label
    }
    response = requests.post(url, data=data)
    result = response.json()

    if result['status'] == 0:
        print("标注点编辑成功！")
    else:
        print("标注点编辑失败！")

if __name__ == "__main__":
    point_id = "your_point_id"
    new_label = "这是修改后的标注点"

    update_marker(point_id, new_label)

In the above code, we call the updatepoint method of Baidu Map API to edit annotation points. We need to pass in the id of the label point and the new attribute value. After the editing is successful, the API will return a result, and we can judge whether the editing was successful based on the status field of the result.

Through the above examples, we can see that it is very simple to add and edit map points using Python and Baidu Map API. We only need to understand the basic concepts and usage of Baidu Map API and call the corresponding API interface to achieve the functions we want. I hope this article will be helpful for adding and editing map points using Python and Baidu Map API.

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