Reverse Geocoding

This example demonstrates reverse geocoding of coordinates to addresses.

TypeScript

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 8,
      center: { lat: 40.731, lng: -73.997 },
    }
  );
  const geocoder = new google.maps.Geocoder();
  const infowindow = new google.maps.InfoWindow();

  (document.getElementById("submit") as HTMLElement).addEventListener(
    "click",
    () => {
      geocodeLatLng(geocoder, map, infowindow);
    }
  );
}

function geocodeLatLng(
  geocoder: google.maps.Geocoder,
  map: google.maps.Map,
  infowindow: google.maps.InfoWindow
) {
  const input = (document.getElementById("latlng") as HTMLInputElement).value;
  const latlngStr = input.split(",", 2);
  const latlng = {
    lat: parseFloat(latlngStr[0]),
    lng: parseFloat(latlngStr[1]),
  };

  geocoder
    .geocode({ location: latlng })
    .then((response) => {
      if (response.results[0]) {
        map.setZoom(11);

        const marker = new google.maps.Marker({
          position: latlng,
          map: map,
        });

        infowindow.setContent(response.results[0].formatted_address);
        infowindow.open(map, marker);
      } else {
        window.alert("No results found");
      }
    })
    .catch((e) => window.alert("Geocoder failed due to: " + e));
}index.ts

JavaScript

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 8,
    center: { lat: 40.731, lng: -73.997 },
  });
  const geocoder = new google.maps.Geocoder();
  const infowindow = new google.maps.InfoWindow();

  document.getElementById("submit").addEventListener("click", () => {
    geocodeLatLng(geocoder, map, infowindow);
  });
}

function geocodeLatLng(geocoder, map, infowindow) {
  const input = document.getElementById("latlng").value;
  const latlngStr = input.split(",", 2);
  const latlng = {
    lat: parseFloat(latlngStr[0]),
    lng: parseFloat(latlngStr[1]),
  };

  geocoder
    .geocode({ location: latlng })
    .then((response) => {
      if (response.results[0]) {
        map.setZoom(11);

        const marker = new google.maps.Marker({
          position: latlng,
          map: map,
        });

        infowindow.setContent(response.results[0].formatted_address);
        infowindow.open(map, marker);
      } else {
        window.alert("No results found");
      }
    })
    .catch((e) => window.alert("Geocoder failed due to: " + e));
}
index.js

CSS

/* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
#map {
  height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: "Roboto", "sans-serif";
  line-height: 30px;
  padding-left: 10px;
}

#floating-panel {
  position: absolute;
  top: 5px;
  left: 50%;
  margin-left: -180px;
  width: 350px;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
}

#latlng {
  width: 225px;
}
style.css

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Reverse Geocoding</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script src="./index.js"></script>
  </head>
  <body>
    <div id="floating-panel">
      <input id="latlng" type="text" value="40.714224,-73.961452" />
      <input id="submit" type="button" value="Reverse Geocode" />
    </div>
    <div id="map"></div>

    <!-- Async script executes immediately and must be after any DOM elements used in callback. -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&v=weekly"
      async
    ></script>
  </body>
</html>sample.html

/* Always set the map height explicitly to define the size of the div * element that contains the map. */ #map { height: 100%; } /* Optional: Makes the sample page fill the window. */ html, body { height: 100%; margin: 0; padding: 0; } #floating-panel { position: absolute; top: 10px; left: 25%; z-index: 5; background-color: #fff; padding: 5px; border: 1px solid #999; text-align: center; font-family: "Roboto", "sans-serif"; line-height: 30px; padding-left: 10px; } #floating-panel { position: absolute; top: 5px; left: 50%; margin-left: -180px; width: 350px; z-index: 5; background-color: #fff; padding: 5px; border: 1px solid #999; } #latlng { width: 225px; }

<!DOCTYPE html> <html> <head> <title>Reverse Geocoding</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>  </head> <body> <div id="floating-panel"> <input id="latlng" type="text" value="40.714224,-73.961452" /> <input id="submit" type="button" value="Reverse Geocode" /> </div> <div id="map"></div>  <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly&channel=2" async ></script> </body> </html>

Try Sample

CodeSandbox.io

Stackblitz.com

GitPod.io

Google Cloud Shell

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

  git clone -b sample-geocoding-reverse git@github.com:googlemaps/js-samples.git
  cd js-samples
  npm i
  npm start

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.

  git checkout sample-SAMPLE_NAME
  npm i
  npm start