/
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_layer_data_quakes_red]
let map: google.maps.Map;
function initMap(): void {
map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
center: { lat: 20, lng: -160 },
zoom: 2,
});
// Get the earthquake data (JSONP format)
// This feed is a copy from the USGS feed, you can find the originals here:
// http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php
const script = document.createElement("script");
script.setAttribute(
"src",
"https://storage.googleapis.com/mapsdevsite/json/quakes.geo.json"
);
document.getElementsByTagName("head")[0].appendChild(script);
// Add a basic style.
map.data.setStyle((feature) => {
const mag = Math.exp(parseFloat(feature.getProperty("mag"))) * 0.1;
return /** @type {google.maps.Data.StyleOptions} */ {
icon: {
path: google.maps.SymbolPath.CIRCLE,
scale: mag,
fillColor: "#f00",
fillOpacity: 0.35,
strokeWeight: 0,
},
};
});
}
// Defines the callback function referenced in the jsonp file.
function eqfeed_callback(data: any) {
map.data.addGeoJson(data);
}
// [END maps_layer_data_quakes_red]
export { initMap, eqfeed_callback };