var map = L.map('leaflet-map', { center: [40.7128, -74.0059], zoom: 10 }) L.tileLayer('https://cartodb-basemaps-{s}.global.ssl.fastly.net/light_all/{z}/{x}/{y}.png', { maxZoom: 18, attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>, © <a href="https://carto.com/attribution">CARTO</a>' }).addTo(map) var hess = { "type": "Feature", "properties": { "name": "Hess' Triangle" }, "geometry": { "type": "Point", "coordinates": [ -74.00306, 40.73349 ] } } L.geoJSON(hess, { pointToLayer: function (feature, latlng) { return L.circleMarker(latlng, { radius: 10, opacity: 0, fillColor: "steelblue", fillOpacity: 0.7 }) } }).addTo(map)