dev-chiefworks
85 lines
2.3 KiB
JavaScript
85 lines
2.3 KiB
JavaScript
/* ------------------------------------------------------------------------------
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*
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* # Circles
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*
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* Specific JS code additions for maps_google_drawings.html page
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*
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* Version: 1.0
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* Latest update: Aug 1, 2015
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*
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* ---------------------------------------------------------------------------- */
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$(function() {
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// This example creates circles on the map, representing
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// populations in North America.
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// First, create an object containing LatLng and population for each city.
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var citymap = {};
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citymap['wroclaw'] = {
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center: new google.maps.LatLng(51.112, 17.052),
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population: 271485
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};
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citymap['budapest'] = {
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center: new google.maps.LatLng(47.481, 19.130),
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population: 840583
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};
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citymap['kernstadt'] = {
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center: new google.maps.LatLng(51.720, 8.764),
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population: 385779
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};
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citymap['nancy'] = {
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center: new google.maps.LatLng(48.688, 6.173),
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population: 603502
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};
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citymap['munich'] = {
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center: new google.maps.LatLng(48.154, 11.541),
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population: 594039
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};
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citymap['warsaw'] = {
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center: new google.maps.LatLng(52.232, 21.061),
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population: 492093
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};
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// Initialize
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var cityCircle;
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function initialize() {
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// Options
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var mapOptions = {
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zoom: 6,
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center: new google.maps.LatLng(50.059, 14.465),
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mapTypeId: google.maps.MapTypeId.TERRAIN
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};
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// Apply options
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var map = new google.maps.Map($('.map-drawing-circles')[0], mapOptions);
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// Construct the circle for each value in citymap.
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// Note: We scale the area of the circle based on the population.
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for (var city in citymap) {
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// Options
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var populationOptions = {
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strokeColor: '#b41b1b',
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strokeOpacity: 0.5,
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strokeWeight: 1,
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fillColor: '#b41b1b',
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fillOpacity: 0.2,
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map: map,
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center: citymap[city].center,
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radius: Math.sqrt(citymap[city].population) * 100
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};
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// Add the circle for this city to the map.
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cityCircle = new google.maps.Circle(populationOptions);
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}
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}
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// Load map
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google.maps.event.addDomListener(window, 'load', initialize);
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});
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