wayne-origin-map/index.html at master · klovskim/wayne-origin-map · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <!-- standard setup -->
        <meta charset='utf-8' />
        <title>Display a map</title>
        <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
        <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.js'></script>
        <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.css' rel='stylesheet' />
        <link href='origin_map_styles.css' rel='stylesheet' />
    </head>

    <body>
    <div id='map'></div>
        <div class='map-overlay top'>
            <div class='map-overlay-inner'>
                <!-- all the credits and data sources -->
                <h2>Countries of Origin for Foreign-Born Residents of Wayne County, Michigan 2018</h2>
                <p>Click on an origin point within a country to see how many people born there now live in Wayne County</p>
                <p class="credit">Population Data: <a href="https://factfinder.census.gov/faces/nav/jsf/pages/searchresults.xhtml?refresh=t">U.S Census 2018</a></p>
                <p class="credit">Country Centroids: <a href="https://worldmap.harvard.edu/data/geonode:country_centroids_az8">Harvard World Map</a></p>
                <p class="credit">Wayne County: <a href="http://gis-michigan.opendata.arcgis.com/datasets/67a8ff23b5f54f15b7133b8c30981441_0">MI GIS Open Data</a></p>
                <p class="credit"><a href="https://carto.com/blog/jets-and-datelines/">A helpful polyline wrapping resource</a></p>
                <p class="credit"><a href="https://github.com/klovskim">My Github</a></p>
            </div>
        </div>
        <div class='box-legend' id='legend'></div>
    <script>
    mapboxgl.accessToken = 'pk.eyJ1IjoibWtsb3Zza2kiLCJhIjoiY2l6N2R0azl2MDA1NDJ3cG9uZ2RoMzF5aiJ9.UacgAXrCVFX4BmcbH4oj_w';
    const map = new mapboxgl.Map({
        container: 'map',
        style: 'mapbox://styles/mklovski/cjsswrzi53eeq1fpaqlb62fam',
        // set the default load location
        center: [-37.705044, 25.502323],
        zoom: 2
    });
    map.addControl(new mapboxgl.NavigationControl());
    map.on('load', function () {
        // adding wayne county outline
        map.addLayer({
        id: 'wayne_county',
        type: 'fill',
        source: {
         type: 'vector',
         url: 'mapbox://mklovski.5jbu3hm3'
        },
        'source-layer': 'wayne_county_border-23lapf',
        'layout': {
        'visibility': 'visible'
        },
        // style the borders of wayne county
        paint: {
        'fill-color': '#ffffff',
        'fill-opacity': .5,
        'fill-outline-color': '#000000',
        }
        }),
// adding the lines that were split to accomodate the dateline
        map.addLayer({
            id: 'split_circle_lines',
            type: 'line',
            source: {
             type: 'vector',
             url: 'mapbox://mklovski.75q4x6yf'
            },
            'source-layer': 'asia_lines-abqtv5',
            'layout': {
            'visibility': 'visible'
            },
            // style for the origin nodes, size according to people_count and then scale by 2000
            paint: {
            'line-color': [
                'match',
                ['get', 'continent'],
                'Americas', '#99420c',
                'Africa', '#7570b3',
                'Asia', '#e55e5e',
                'Europe', '#1b9e77',
                'Oceania', '#3bb2d0',
                /* other */ '#ccc'
                ],
            'line-opacity': 1,
            'line-width': [
                '/',
                ['number', ['get', 'people_cou']],
            2000],
            }
        }),
// regular lines
        map.addLayer({
            id: 'reg_circle_lines',
            type: 'line',
            source: {
             type: 'vector',
             url: 'mapbox://mklovski.8snn31e0'
            },
            'source-layer': 'nosplit_lines-6tz5xp', // name of tilesets
            'layout': {
            'visibility': 'visible'
            },
            // style for the origin nodes, size according to people_count
            paint: {
            'line-color': [
                'match',
                ['get', 'continent'],
                'Americas', '#99420c',
                'Africa', '#7570b3',
                'Asia', '#e55e5e',
                'Europe', '#1b9e77',
                'Oceania', '#3bb2d0',
                /* other */ '#ccc'
                ],
            'line-opacity': 1,
            'line-width': [
                '/',
                ['number', ['get', 'people_cou']],
            2000],
            }
        }),
    // adding the points of origin here where the lines "originate"
        map.addLayer({
            id: 'country_points',
            type: 'circle',
            source: {
             type: 'vector',
             url: 'mapbox://mklovski.2p53ryec'
            },
            'source-layer': 'country_centroids-5solf9',
            'layout': {},
            // style for the origin nodes, size according to people_count
            paint: {
            'circle-color': [
                'match',
                ['get', 'continent'],
                'Americas', '#99420c',
                'Africa', '#7570b3',
                'Asia', '#e55e5e',
                'Europe', '#1b9e77',
                'Oceania', '#3bb2d0',
                /* other */ '#ccc'
                ],
            'circle-opacity': 1,
            'circle-stroke-color': '#99420c',
            'circle-stroke-opacity': 1
            }
        })
    });
// make a popup for when you click on the country points
    map.on('click', 'country_points', function (e) {
        var coordinates = e.features[0].geometry.coordinates.slice();
        var geography = e.features[0].properties.geography;
        var people_count = e.features[0].properties.people_count;
        while (Math.abs(e.lngLat.lng - coordinates[0]) > 180) {
        coordinates[0] += e.lngLat.lng > coordinates[0] ? 360 : -360;
        }
        // format the popup
        new mapboxgl.Popup()
            .setLngLat(coordinates)
            .setHTML("<h3>" + geography + "</h3>" + people_count + " People Born Here")
            .addTo(map);
        });
// change the icon when you hover it
    map.on('mouseenter', 'country_points', function () {
        map.getCanvas().style.cursor = 'pointer';
    });
    // change it back when you leave
    map.on('mouseleave', 'country_points', function () {
        map.getCanvas().style.cursor = '';
    });

    // add a legend
    var legendlabels = ['Africa', 'Americas', 'Asia', 'Europe', 'Oceania'];
    var colors = ['#7570b3', '#99420c', '#e55e5e', '#1b9e77', '#3bb2d0'];
    for (i = 0; i < legendlabels.length; i++) {
        var layer = legendlabels[i];
        var color = colors[i];
        var item = document.createElement('div');
        var key = document.createElement('span');
        key.className = 'legend-key';
        key.style.backgroundColor = color;

        var value = document.createElement('span');
        value.innerHTML = layer;
        item.appendChild(key);
        item.appendChild(value);
        legend.appendChild(item);
    }
        </script>
    </body>
</html>