React google map address to geocode(lng, lat)

 

1. Introduction

In this article, we will learn how to use GoogleMap address geocode in React. React is a popular JavaScript library currently being loved by many web developers. The Google Maps API is a powerful tool for adding map and location functionality to web applications. By combining these two techniques, you can implement a function that converts addresses to coordinates.

2. React and the Google Maps API

React provides a declarative and efficient way to build user interfaces. The Google Maps API provides a variety of geographic features, such as maps, place search, and route navigation. Using both technologies together can provide a good user experience for users.

3. Addresses and Geocoding

Geocoding is the process of converting addresses into coordinates. For example, if you convert the address "Yeoksam-dong, Gangnam-gu, Seoul" to coordinates, it will be displayed as longitude and latitude. These transformations are very important in applications that deal with geographic information.

4. Using GoogleMap Address Geocode in React

To use Google Map address geocode in your React application, you must first obtain a Google Maps API key. Then google-maps-reactyou need to install and import Google Maps library for React like

import React, { Component } from 'react';
import { Map, GoogleApiWrapper } from 'google-maps-react';

class MapContainer extends Component {
  render() {
    return (
      <Map
        google={this.props.google}
        zoom={14}
        initialCenter={{
          lat: 37.5665,
          lng: 126.9780
        }}
      />
    );
  }
}

export default GoogleApiWrapper({
  apiKey: 'YOUR_GOOGLE_MAPS_API_KEY'
})(MapContainer);

The above example is basic in React.

Demonstrates how to render a Google Maps component that is Now let's add the ability to convert addresses to coordinates.

 

*Lat, Lng are terms used in coordinate systems to indicate latitude and longitude. Latitude and longitude are used to accurately indicate a specific geographic location on Earth.

5. Examples and Practice

import React, { Component } from 'react';
import Geocode from 'react-geocode';

class GeocodeExample extends Component {
  componentDidMount() {
    Geocode.fromAddress('서울특별시 강남구 역삼동').then(
      response => {
        const { lat, lng } = response.results[0].geometry.location;
        console.log(lat, lng);
      },
      error => {
        console.error(error);
      }
    );
  }

  render() {
    return (
      <div>Geocode Example</div>
    );
  }
}

export default GeocodeExample;

The example above react-geocodeshows how to convert addresses to coordinates using the library. componentDidMountThe method Geocode.fromAddressuses a function to transform the address, and outputs the transformed coordinates.

6. Using only Google APIs without libraries

In the case of the code above, the React library was used, but the latitude and longitude can be changed using only axios and Google APIs.

const GeocodeComponent = () => {
  const [address, setAddress] = useState('');
  const [latitude, setLatitude] = useState(null);
  const [longitude, setLongitude] = useState(null);
  
  // Function to handle address input change
  const handleAddressChange = (event) => {
    setAddress(event.target.value);
  };

  // Function to handle form submission
  const handleSubmit = async (event) => {
    event.preventDefault();

    try {
      const response = await axios.get('https://maps.googleapis.com/maps/api/geocode/json', {
        params: {
          address: address,
          key: 'YOUR_GOOGLE_MAPS_API_KEY', // Replace with your own API key
        },
      });

      const { results } = response.data;

      if (results.length > 0) {
        const { lat, lng } = results[0].geometry.location;
        setLatitude(lat);
        setLongitude(lng);
      } else {
        // Handle case when no results are found
        console.log('No results found.');
      }
    } catch (error) {
      // Handle error
      console.error('Error occurred:', error);
    }
  };

  // Render the component
  return (
    <div>
      <form onSubmit={handleSubmit}>
        <input type="text" value={address} onChange={handleAddressChange} />
        <button type="submit">Geocode</button>
      </form>

      {latitude && longitude && (
        <div>
          Latitude: {latitude}
          <br />
          Longitude: {longitude}
        </div>
      )}
    </div>
  );
};

export default GeocodeComponent;

7. Performance and Optimization

The GoogleMap Address Geocode feature requires network requests and may affect performance. Therefore, it is recommended to minimize unnecessary requests by providing an autocomplete function before the user enters an address, if necessary.

You can also perform optimizations such as caching coordinate transformation results and re-requesting them only when necessary. By doing this, you can improve the performance of your application.

8. Conclusion

In this article, you learned how to use GoogleMap address geocode in React. By combining the Google Maps API and React, you can develop beautiful web applications that leverage geographic features. The ability to convert addresses to coordinates can be utilized in a variety of applications, and it is important to develop them with performance and optimization in mind.