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In this tutorial, you will learn how to get location information like country, city name, zipcode, etc, from latitude and longitude in javascript using Google geocoding API.
How to Get Country, City Name, Zipcode from Latitude and Longitude in JavaScript
Steps to get country, city name, zipcode, and location from latitude and longitude in javascript using Google geocoding API:
- Step 1: Get API Key from Google Maps
- Step 2: Set up your HTML
- Step 3: Create Your JavaScript File (script.js)
- Step 4: Testing
Step 1: Get API Key from Google Maps
You’ll need an API key from the Google Cloud Platform to use the Google Maps Geocoding API. You can create one by following these steps:
- Go to the Google Cloud Platform Console: https://console.cloud.google.com/
- Create a new project or select an existing one.
- In the sidebar, navigate to “APIs & Services” > “Credentials.”
- Click on “Create Credentials” and select “API Key.”
- Copy the generated API key.
Step 2: Set up your HTML
Next, you need to create an HTML file with a form for inputting latitude and longitude. You’ll also need a div to display the results:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Reverse Geocoding Example</title>
</head>
<body>
<h1>Reverse Geocoding</h1>
<form id="location-form">
<label for="latitude">Latitude:</label>
<input type="text" id="latitude" placeholder="Enter latitude">
<br>
<label for="longitude">Longitude:</label>
<input type="text" id="longitude" placeholder="Enter longitude">
<br>
<button type="submit">Get Location Info</button>
</form>
<div id="result">
<!-- Display results here -->
</div>
<script src="script.js"></script>
</body>
</html>
Step 3: Create Your JavaScript File (script.js)
Once you have created HTML, Then you need to create script.js and add the following code to handle form submission and geocoding:
document.addEventListener('DOMContentLoaded', () => {
const form = document.getElementById('location-form');
const latitudeInput = document.getElementById('latitude');
const longitudeInput = document.getElementById('longitude');
const resultDiv = document.getElementById('result');
form.addEventListener('submit', (e) => {
e.preventDefault();
const latitude = parseFloat(latitudeInput.value);
const longitude = parseFloat(longitudeInput.value);
if (isNaN(latitude) || isNaN(longitude)) {
alert('Please enter valid latitude and longitude.');
return;
}
// Call the geocoding function
getGeocodingData(latitude, longitude);
});
function getGeocodingData(latitude, longitude) {
// Replace 'YOUR_API_KEY' with your actual API key if required
const apiKey = 'YOUR_API_KEY';
const apiUrl = `https://maps.googleapis.com/maps/api/geocode/json?latlng=${latitude},${longitude}&key=${apiKey}`;
fetch(apiUrl)
.then((response) => response.json())
.then((data) => {
const addressComponents = data.results[0].address_components;
let countryName, cityName, stateName, zipcode;
for (const component of addressComponents) {
if (component.types.includes('country')) {
countryName = component.long_name;
} else if (component.types.includes('locality')) {
cityName = component.long_name;
} else if (component.types.includes('administrative_area_level_1')) {
stateName = component.long_name;
} else if (component.types.includes('postal_code')) {
zipcode = component.long_name;
}
}
// Display the results
resultDiv.innerHTML = `
<p>Country: ${countryName}</p>
<p>City: ${cityName}</p>
<p>State: ${stateName}</p>
<p>Zipcode: ${zipcode}</p>
`;
})
.catch((error) => {
console.error('Error fetching data:', error);
resultDiv.innerHTML = '<p>Something went wrong. Please try again later.</p>';
});
}
});
Remember to replace ‘YOUR_API_KEY’ with your actual API key if required for the geocoding service you’re using.
Step 4: Testing
Open the HTML file in a web browser. Enter valid latitude and longitude coordinates in the form fields and click the “Get Location Info” button. The script will make an API request, and retrieve & display the country name, city name, state name, and zipcode based on the provided coordinates.
Conclusion
That’s it! You have learned how to extract location information like country, city name, zipcode, etc from latitude and longitude coordinates in javascript.
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