281 lines
7.1 KiB
HTML
281 lines
7.1 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>World Population Density</title>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<link rel="shortcut icon" type="image/x-icon" href="docs/images/favicon.ico" />
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<link rel="stylesheet" href="https://unpkg.com/leaflet@1.2.0/dist/leaflet.css" integrity="sha512-M2wvCLH6DSRazYeZRIm1JnYyh22purTM+FDB5CsyxtQJYeKq83arPe5wgbNmcFXGqiSH2XR8dT/fJISVA1r/zQ==" crossorigin=""/>
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<script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet.js" integrity="sha512-lInM/apFSqyy1o6s89K4iQUKg6ppXEgsVxT35HbzUupEVRh2Eu9Wdl4tHj7dZO0s1uvplcYGmt3498TtHq+log==" crossorigin=""></script>
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<style>
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html, body {
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height: 100%;
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margin: 0;
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}
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#map { width: 100%; height: 100%; }
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.info { padding: 6px 8px; font: 14px/16px Arial, Helvetica, sans-serif; background: white; background: rgba(255,255,255,0.8); box-shadow: 0 0 15px rgba(0,0,0,0.2); border-radius: 5px; } .info h4 { margin: 0 0 5px; color: #777; }
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.legend { text-align: left; line-height: 18px; color: #555; } .legend i { width: 18px; height: 18px; float: left; margin-right: 8px; opacity: 0.7; }</style>
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</head>
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<body>
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<div id='map'></div>
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<script type="text/javascript" src="maps/world/countries-dev.js"></script>
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<script type="text/javascript">
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String.prototype.format = function() {
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// Usage: 'The {0} is dead. Don\'t code {0}. Code {1} that is open source!'.format('ASP', 'PHP');
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var formatted = this;
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for (var i = 0; i < arguments.length; i++) {
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var regexp = new RegExp('\\{'+i+'\\}', 'gi');
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formatted = formatted.replace(regexp, arguments[i]);
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}
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return formatted;
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};
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function setData() {
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geojson.remove();
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geojson = L.geoJson(worldData[currentDataset], {
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style: style,
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onEachFeature: onEachFeature
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}).addTo(map);
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}
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var map = L.map('map').setView([10, 30], 2);
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var currentZoom = map.getZoom();
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var currentDataset = 'world';
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var worldData = { 'world' : countries };
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map.on('zoomend', function(ev) {
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if(map.getZoom() < currentZoom){
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console.log('zoomed out to ' + map.getZoom());
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}
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currentZoom = map.getZoom();
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if(currentZoom <= 6 && currentDataset != 'world'){
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console.log('reset to world now');
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currentDataset = 'world';
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setData();
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}
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});
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L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', {
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maxZoom: 18,
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attribution: 'Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, ' +
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'<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
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'Imagery © <a href="http://mapbox.com">Mapbox</a>',
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id: 'mapbox.light'
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}).addTo(map);
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// control that shows state info on hover
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var info = L.control();
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info.onAdd = function (map) {
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this._div = L.DomUtil.create('div', 'info');
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this.update();
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return this._div;
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};
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info.update = function (props) {
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this._div.innerHTML = '<h4>Population Density</h4>' + (props ?
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'<b>' + props.name + '</b><br />' + props.density + ' humans / km<sup>2</sup>'
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: 'Hover over a country.<br />Click for regional data on:<br /><ul><li>Netherlands</li><li>England</li><li>USA</li></ul>');
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};
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info.addTo(map);
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// get color depending on population density value
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function getColor(d) {
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return d > 1000 ? '#800026' :
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d > 500 ? '#BD0026' :
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d > 200 ? '#E31A1C' :
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d > 100 ? '#FC4E2A' :
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d > 50 ? '#FD8D3C' :
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d > 20 ? '#FEB24C' :
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d > 10 ? '#FED976' :
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'#FFEDA0';
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}
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function style(feature) {
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return {
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weight: 2,
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opacity: 1,
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color: 'white',
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dashArray: '3',
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fillOpacity: 0.7,
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fillColor: getColor(feature.properties.density)
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};
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}
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function highlightFeature(e) {
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var layer = e.target;
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layer.setStyle({
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weight: 5,
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color: '#666',
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dashArray: '',
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fillOpacity: 0.7
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});
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if (!L.Browser.ie && !L.Browser.opera && !L.Browser.edge) {
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layer.bringToFront();
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}
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info.update(layer.feature.properties);
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// console.log(map.view);
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}
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var geojson;
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function resetHighlight(e) {
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geojson.resetStyle(e.target);
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info.update();
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}
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function zoomToFeature(e) {
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// console.log(map.getZoom());
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// console.log(map.getCenter());
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// console.log(e);
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console.log(e.target.feature.id);
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map.fitBounds(e.target.getBounds());
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var layer = e.target;
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var countryid = layer.feature.id.toLowerCase();
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currentDataset = countryid;
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if(worldData[countryid] == undefined){
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console.log('new data path', 'maps/' + countryid + '/provinces.geojson');
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request(countryid, layer);
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}else{
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geojson.resetStyle(layer);
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info.update();
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geojson.remove();
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geojson = L.geoJson(worldData[countryid], {
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style: style,
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onEachFeature: onEachFeature
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}).addTo(map);
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layer.setStyle({
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weight: 5,
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color: '#666',
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dashArray: '',
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fillOpacity: 0.7
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});
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if (!L.Browser.ie && !L.Browser.opera && !L.Browser.edge) {
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layer.bringToFront();
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}
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info.update(layer.feature.properties);
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}
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}
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function onEachFeature(feature, layer) {
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layer.on({
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mouseover: highlightFeature,
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mouseout: resetHighlight,
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click: zoomToFeature
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});
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}
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geojson = L.geoJson(worldData[currentDataset], {
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style: style,
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onEachFeature: onEachFeature
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}).addTo(map);
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map.attributionControl.addAttribution('Population data by <a href="https://www.cia.gov/library/publications/download">CIA World Factbook</a> | <a href="https://data.worldbank.org/country">Worldbank</a> | <a href="https://en.wikipedia.org">Wikipedia</a>');
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var legend = L.control({position: 'bottomright'});
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legend.onAdd = function (map) {
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var div = L.DomUtil.create('div', 'info legend'),
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grades = [0, 10, 20, 50, 100, 200, 500, 1000],
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labels = [],
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from, to;
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for (var i = 0; i < grades.length; i++) {
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from = grades[i];
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to = grades[i + 1];
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labels.push(
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'<i style="background:' + getColor(from + 1) + '"></i> ' +
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from + (to ? '–' + to : '+'));
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}
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div.innerHTML = labels.join('<br>');
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return div;
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};
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legend.addTo(map);
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function request(countryid, layer){
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const url = 'maps/{0}/provinces.geojson'.format(countryid);
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var http = new XMLHttpRequest();
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http.open('GET', url, true);
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http.setRequestHeader("Accept","application/json");
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http.send();
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http.onreadystatechange = function()
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{
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console.log(http.readyState,http.status,http.responseText);
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if (http.readyState != 4){
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return;
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}
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if(http.status == 401){
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console.error(http.responseText);
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}
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else if(http.status == 200){
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var resp = JSON.parse(http.responseText);
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console.log('ok');
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worldData[countryid] = resp;
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// statesData = worldData[countryid];
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// console.log(statesData);
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// console.log(target);
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geojson.remove();
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geojson = L.geoJson(worldData[countryid], {
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style: style,
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onEachFeature: onEachFeature
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}).addTo(map);
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geojson.resetStyle(layer);
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info.update(layer.feature.properties);
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}
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}
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}
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</script>
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</body>
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</html>
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