/
index.ts
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/
index.ts
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/*
* Copyright 2019 Google LLC. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// [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],
},
(results, status) => {
infowindow.setPosition(location);
if (status === "OK") {
// 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");
}
} else {
infowindow.setContent("Elevation service failed due to: " + status);
}
}
);
}
// [END maps_elevation_simple]
export { initMap };