Region Code Biasing (US)

  • This sample demonstrates how to send a geocoding request for "Toledo" and receive a US-based result using the Google Maps JavaScript API.

  • The returned geocoding result can vary depending on the specified map region.

  • Sample code is provided in both TypeScript and JavaScript, along with HTML and CSS for displaying the results on a map.

  • Users can try the sample using JSFiddle or Google Cloud Shell, or clone the repository and run it locally with Node.js.

This demonstrates sending a geocoding request for "Toledo" and receiving a result in the US. The result returned depends on the region of the map. See also the demo for the ES region.

Read the documentation.

TypeScript

async function initMap(): Promise<void> {
  await Promise.all([
    google.maps.importLibrary("maps"),
    google.maps.importLibrary("geocoding"),
    google.maps.importLibrary("marker"),
  ]);

  const mapElement = document.querySelector("gmp-map") as google.maps.MapElement;
  const innerMap = mapElement.innerMap;
  const geocoder = new google.maps.Geocoder();

  geocoder
    .geocode({ address: "Toledo" })
    .then((response) => {
      const position = response.results[0].geometry.location;

      innerMap.setCenter(position);
      new google.maps.marker.AdvancedMarkerElement({
        map: innerMap,
        position,
      });
    })
    .catch((e) =>
      window.alert("Geocode was not successful for the following reason: " + e)
    );
}

initMap();
index.ts

JavaScript

async function initMap() {
    await Promise.all([
        google.maps.importLibrary("maps"),
        google.maps.importLibrary("geocoding"),
        google.maps.importLibrary("marker"),
    ]);
    const mapElement = document.querySelector("gmp-map");
    const innerMap = mapElement.innerMap;
    const geocoder = new google.maps.Geocoder();
    geocoder
        .geocode({ address: "Toledo" })
        .then((response) => {
        const position = response.results[0].geometry.location;
        innerMap.setCenter(position);
        new google.maps.marker.AdvancedMarkerElement({
            map: innerMap,
            position,
        });
    })
        .catch((e) => window.alert("Geocode was not successful for the following reason: " + e));
}
initMap();
index.js

CSS

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

style.css

HTML

<html>
  <head>
    <title>Geocoding Region - US</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
    <!-- prettier-ignore -->
    <script>(g => { var h, a, k, p = "The Google Maps JavaScript API", c = "google", l = "importLibrary", q = "__ib__", m = document, b = window; b = b[c] || (b[c] = {}); var d = b.maps || (b.maps = {}), r = new Set, e = new URLSearchParams, u = () => h || (h = new Promise(async (f, n) => { await (a = m.createElement("script")); e.set("libraries", [...r] + ""); for (k in g) e.set(k.replace(/[A-Z]/g, t => "_" + t[0].toLowerCase()), g[k]); e.set("callback", c + ".maps." + q); a.src = `https://maps.${c}apis.com/maps/api/js?` + e; d[q] = f; a.onerror = () => h = n(Error(p + " could not load.")); a.nonce = m.querySelector("script[nonce]")?.nonce || ""; m.head.append(a) })); d[l] ? console.warn(p + " only loads once. Ignoring:", g) : d[l] = (f, ...n) => r.add(f) && u().then(() => d[l](f, ...n)) })
        ({ key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "weekly", region: "US" });</script>
  </head>
  <body>
    <gmp-map zoom="8" map-id="DEMO_MAP_ID"></gmp-map>
  </body>
</html>
index.html

Try Sample

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 https://github.com/googlemaps-samples/js-api-samples.git
  cd samples/geocoding-region-us
  npm i
  npm start