D3 Examples - Folium Geo/TopoJSON Overlay

Folium Geo/TopoJSON Overlay

A Leaflet.js map created with Folium using both GeoJSON and TopoJSON. The map was generated with the following Python code:

geo_path = r'data/antarctic_ice_edge.json' topo_path = r'data/antarctic_ice_shelf_topo.json' ice_map = folium.Map(location=[-59.1759, -11.6016], tiles='Mapbox Bright', zoom_start=2) ice_map.geo_json(geo_path=geo_path) ice_map.geo_json(geo_path=topo_path, topojson='objects.antarctic_ice_shelf') ice_map.create_map()

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<!DOCTYPE html>
<head>
   <link rel="stylesheet" href="https://cdn.leafletjs.com/leaflet-0.5/leaflet.css" />
   <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.5/leaflet.min.js"></script>
   <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
   <script src="https://d3js.org/queue.v1.min.js"></script>
   
   <script src="https://d3js.org/topojson.v1.min.js"></script>
   
   
<style>
​
.legend {
    padding: 0px 0px;
    font: 10px 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;
}
​
.key path {
  display: none;
}
​
</style>
</head>
<body>
​
        <div id="map" style="width: 960px; height: 500px"></div>
​
<script>
​
queue()
    .defer(d3.json, 'data/antarctic_ice_edge.json')
    .defer(d3.json, 'data/antarctic_ice_shelf_topo.json')
    .await(makeMap)
​
function makeMap(error, gjson_1,tjson_2) {
​
    
    topo_2 = topojson.feature(tjson_2, tjson_2.objects.antarctic_ice_shelf);
    
​
    
​
    function matchKey(datapoint, key_variable){
        return(parseFloat(key_variable[0][datapoint]));
    };
​
    
​
    var map = L.map('map').setView([-59.1759, -11.6016], 2);
​
    L.tileLayer('https://{s}.tiles.mapbox.com/v3/mapbox.world-bright/{z}/{x}/{y}.png', {
        maxZoom: 18,
        attribution: 'Map tiles by <a href="https://www.mapbox.com/m">Mapbox</a> Data by <a href="https://openstreetmap.org">OpenStreetMap</a>, under <a href="https://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.'
    }).addTo(map);
​
    
​
    
​
    
​
    
    function style_1(feature) {
    return {
        fillColor: 'blue',
        weight: 1,
        opacity: 1,
        color: 'black',
        fillOpacity: 0.6
    };
}
    
    function style_2(feature) {
    return {
        fillColor: 'blue',
        weight: 1,
        opacity: 1,
        color: 'black',
        fillOpacity: 0.6
    };
}
    
​
    
    gJson_layer_1 = L.geoJson(gjson_1, {style: style_1}).addTo(map)
    
    gJson_layer_2 = L.geoJson(topo_2, {style: style_2}).addTo(map)
    
​
    
​
};
​
</script>
​
</body>
    