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index.ts
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index.ts
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/**
* @license
* Copyright 2019 Google LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
// [START maps_elevation_simple]
function initMap(): void {
const map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 8,
center: { lat: 63.333, lng: -150.5 }, // Denali.
mapTypeId: "terrain",
}
);
const elevator = new google.maps.ElevationService();
const infowindow = new google.maps.InfoWindow({});
infowindow.open(map);
// Add a listener for the click event. Display the elevation for the LatLng of
// the click inside the infowindow.
map.addListener("click", (event) => {
displayLocationElevation(event.latLng, elevator, infowindow);
});
}
function displayLocationElevation(
location: google.maps.LatLng,
elevator: google.maps.ElevationService,
infowindow: google.maps.InfoWindow
) {
// Initiate the location request
elevator
.getElevationForLocations({
locations: [location],
})
.then(({ results }) => {
infowindow.setPosition(location);
// Retrieve the first result
if (results[0]) {
// Open the infowindow indicating the elevation at the clicked position.
infowindow.setContent(
"The elevation at this point <br>is " +
results[0].elevation +
" meters."
);
} else {
infowindow.setContent("No results found");
}
})
.catch((e) =>
infowindow.setContent("Elevation service failed due to: " + e)
);
}
declare global {
interface Window {
initMap: () => void;
}
}
window.initMap = initMap;
// [END maps_elevation_simple]
export {};