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index.js
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index.js
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/**
* @license
* Copyright 2019 Google LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
// [START maps_maptype_image_overlay]
function initMap() {
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 18,
center: { lat: 37.783, lng: -122.403 },
});
const bounds = {
17: [
[20969, 20970],
[50657, 50658],
],
18: [
[41939, 41940],
[101315, 101317],
],
19: [
[83878, 83881],
[202631, 202634],
],
20: [
[167757, 167763],
[405263, 405269],
],
};
const imageMapType = new google.maps.ImageMapType({
getTileUrl: function (coord, zoom) {
if (
zoom < 17 ||
zoom > 20 ||
bounds[zoom][0][0] > coord.x ||
coord.x > bounds[zoom][0][1] ||
bounds[zoom][1][0] > coord.y ||
coord.y > bounds[zoom][1][1]
) {
return "";
}
return [
"https://www.gstatic.com/io2010maps/tiles/5/L2_",
zoom,
"_",
coord.x,
"_",
coord.y,
".png",
].join("");
},
tileSize: new google.maps.Size(256, 256),
});
map.overlayMapTypes.push(imageMapType);
}
window.initMap = initMap;
// [END maps_maptype_image_overlay]