D3 Examples - Leaflet Map with a Rectangle

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<!DOCTYPE html>
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<html>
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<head>
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<title>Leaflet Web Map</title>
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<!-- reference to Leaflet CSS -->
<link rel="stylesheet" href="https://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" />
​
<!-- reference to Leaflet JavaScript -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.3/leaflet.min.js"></script>
​
<!-- set width and height styles for map -->
<style>
#map {
    width: 960px;
    height:500px;
}
</style>
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</head>
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<body>
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    <!-- place holder for map -->
    <div id="map"></div>
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<script>
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    // create map object, tell it to live in 'map' div and give initial latitude, longitude, zoom values
    // pass option to turn scroll wheel zoom off
    var map = L.map('map',{scrollWheelZoom:false}).setView([43.64701, -79.39425], 15);
​
    // add base map tiles from OpenStreetMap and attribution info to 'map' div
    L.tileLayer('https://{s}.tile.osm.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="https://osm.org/copyright">OpenStreetMap</a> contributors'
    }).addTo(map);
​
    // define rectangle geographical bounds
    var bounds = [[43.64701, -79.39425], [43.64533, -79.38235]];
​
    // add rectangle passing bounds and some basic styles
    L.rectangle(bounds, {color: "red", weight: 1}).addTo(map);
    
</script>
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</body>
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</html>
    