How to Turn Any Address into a Map Point with Python and Baidu API

Overview

In this tutorial we show how to convert a physical address into latitude‑longitude coordinates using the Baidu Maps Geocoding API and then visualize the point on a map with Python’s pyecharts library.

1. Convert address to coordinates

First obtain an API key (AK) from the Baidu Map Open Platform by creating a browser‑side application. Then use the following Python code (requires requests and pandas) to request the geocoding service and extract longitude and latitude.

import pandas as pd
import requests

AK = "Replace with your AK"

def get_position(name, AK):
    url = f'http://api.map.baidu.com/geocoding/v3/?address={name}&output=json&ak={AK}'
    res = requests.get(url)
    val = res.json()
    retval = {
        '地址': name,
        '经度': val['result']['location']['lng'],
        '纬度': val['result']['location']['lat'],
        '地区标签': val['result']['level'],
        '是否精确查找': val['result']['precise']
    }
    return retval['经度'], retval['纬度']

Running the function with an address returns its longitude and latitude, which can be verified on a map.

2. Plot the point on a map

Using pyecharts we create a Geo chart, add the coordinate, and render it directly in a Jupyter notebook.

from pyecharts.charts import Geo
from pyecharts import options
from pyecharts.globals import GeoType

g = Geo().add_schema(maptype="杭州")
g.add_coordinate(addr, longitude, latitude)
data_pair = [(addr, 1)]
g.add("", data_pair, type_=GeoType.EFFECT_SCATTER, symbol_size=20)
g.set_series_opts(label_opts=options.LabelOpts(is_show=False))
g.set_global_opts(title_opts=options.TitleOpts(title="pyecharts地图标点测试"))
g.render_notebook()

The resulting map shows the marked location.

For multiple addresses, apply the function with pandas.apply. Heavy usage may require a personal developer account due to API limits.