Virginia - Highcharts Maps

Highcharts Maps demo

HTML

<script src="https://code.highcharts.com/maps/highmaps.js"></script>
<script src="https://code.highcharts.com/maps/modules/exporting.js"></script>

<div id="container"></div>

CSS

#container {
    height: 500px;
    min-width: 310px;
    max-width: 800px;
    margin: 0 auto;
}

.loading {
    margin-top: 10em;
    text-align: center;
    color: gray;
}

JavaScript

(async () => {

    const topology = await fetch(
        'https://code.highcharts.com/mapdata/countries/us/us-va-all.topo.json'
    ).then(response => response.json());

    // Prepare demo data. The data is joined to map using value of 'hc-key'
    // property by default. See API docs for 'joinBy' for more info on linking
    // data and map.
    const data = [
        ['us-sd-51800', 10], ['us-sd-51770', 11], ['us-sd-51730', 12],
        ['us-sd-51570', 13], ['us-sd-51685', 14], ['us-sd-51510', 15],
        ['us-sd-51610', 16], ['us-sd-51820', 17], ['us-sd-51680', 18],
        ['us-sd-51810', 19], ['us-sd-51550', 20], ['us-sd-51710', 21],
        ['us-sd-51740', 22], ['us-sd-51830', 23], ['us-sd-51530', 24],
        ['us-sd-51660', 25], ['us-sd-51678', 26], ['us-sd-51683', 27],
        ['us-sd-51600', 28], ['us-sd-51595', 29], ['us-sd-51840', 30],
        ['us-sd-51107', 31], ['us-sd-51059', 32], ['us-sd-51013', 33],
        ['us-sd-51153', 34], ['us-sd-51133', 35], ['us-sd-51179', 36],
        ['us-sd-51099', 37], ['us-sd-51001', 38], ['us-sd-51043', 39],
        ['us-sd-51061', 40], ['us-sd-51069', 41], ['us-sd-51630', 42],
        ['us-sd-51109', 43], ['us-sd-51137', 44], ['us-sd-51177', 45],
        ['us-sd-51187', 46], ['us-sd-51105', 47], ['us-sd-51540', 48],
        ['us-sd-51005', 49], ['us-sd-51009', 50], ['us-sd-51017', 51],
        ['us-sd-51019', 52], ['us-sd-51021', 53], ['us-sd-51023', 54],
        ['us-sd-51027', 55], ['us-sd-51031', 56], ['us-sd-51035', 57],
        ['us-sd-51045', 58], ['us-sd-51051', 59], ['us-sd-51063', 60],
        ['us-sd-51067', 61], ['us-sd-51071', 62], ['us-sd-51077', 63],
        ['us-sd-51083', 64], ['us-sd-51089', 65], ['us-sd-51121', 66],
        ['us-sd-51141', 67], ['us-sd-51143', 68], ['us-sd-51155', 69],
        ['us-sd-51161', 70], ['us-sd-51163', 71], ['us-sd-51167', 72],
        ['us-sd-51169', 73], ['us-sd-51173', 74], ['us-sd-51185', 75],
        ['us-sd-51191', 76], ['us-sd-51195', 77], ['us-sd-51197',...