container = html`<div style="height: 400px;"></div>`
{
var map = L.map(container).setView([39.74739, -105], 13);
L.tileLayer('https://stamen-tiles.a.ssl.fastly.net/terrain/{z}/{x}/{y}.jpg', {
maxZoom: 18,
attribution: 'Map tiles by <a target="_top" rel="noopener" href="http://stamen.com">Stamen Design</a>, under <a target="_top" rel="noopener" href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. Data by <a target="_top" rel="noopener" href="http://openstreetmap.org">OpenStreetMap</a>, under <a target="_top" rel="noopener" href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>',
tileSize: 512,
zoomOffset: -1
}).addTo(map);
var baseballIcon = L.icon({
iconUrl: 'baseball-marker.png',
iconSize: [32, 37],
iconAnchor: [16, 37],
popupAnchor: [0, -28]
});
function onEachFeature(feature, layer) {
var popupContent = "<p>I started out as a GeoJSON " +
feature.geometry.type + ", but now I'm a Leaflet vector!</p>";
if (feature.properties && feature.properties.popupContent) {
popupContent += feature.properties.popupContent;
}
layer.bindPopup(popupContent);
}
L.geoJSON([bicycleRental, campus], {
style: function (feature) {
return feature.properties && feature.properties.style;
},
onEachFeature: onEachFeature,
pointToLayer: function (feature, latlng) {
return L.circleMarker(latlng, {
radius: 8,
fillColor: "#ff7800",
color: "#000",
weight: 1,
opacity: 1,
fillOpacity: 0.8
});
}
}).addTo(map);
L.geoJSON(freeBus, {
filter: function (feature, layer) {
if (feature.properties) {
// If the property "underConstruction" exists and is true, return false (don't render features under construction)
return feature.properties.underConstruction !== undefined ? !feature.properties.underConstruction : true;
}
return false;
},
onEachFeature: onEachFeature
}).addTo(map);
var coorsLayer = L.geoJSON(coorsField, {
pointToLayer: function (feature, latlng) {
return L.marker(latlng, {icon: baseballIcon});
},
onEachFeature: onEachFeature
}).addTo(map);
invalidation.then(() => map.remove()); // clean up when rerunning the cell
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
