Published
Edited
Feb 17, 2021
1 fork
Also listed in…
ges
Insert cell
Insert cell
container = html`<div style="height:400px;">`
Insert cell
{
// zoomSnap and zoomAnimation settings eliminate stacatto zoom
var mymap = L.map(container, { zoomSnap: 0.1, zoomAnimation: false }).setView([51.505, -0.09], 13);

L.tileLayer('https://stamen-tiles-{s}.a.ssl.fastly.net/terrain/{z}/{x}/{y}{r}.{ext}', {
attribution: 'Map tiles by <a href="http://stamen.com">Stamen Design</a>, <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; Map data &copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors',
subdomains: 'abcd',
minZoom: 0,
maxZoom: 20,
ext: 'png'
}).addTo(mymap);

L.marker([51.5, -0.09]).addTo(mymap)
.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();

L.circle([51.508, -0.11], 500, {
color: 'red',
fillColor: '#f03',
fillOpacity: 0.5
}).addTo(mymap).bindPopup("I am a circle.");

L.polygon([
[51.509, -0.08],
[51.503, -0.06],
[51.51, -0.047]
]).addTo(mymap).bindPopup("I am a polygon.");


var popup = L.popup();

function onMapClick(e) {
popup
.setLatLng(e.latlng)
.setContent("You clicked the map at " + e.latlng.toString())
.openOn(mymap);
}

mymap.on('click', onMapClick);
invalidation.then(() => mymap.remove()); // For observable -- in case this cell is re-executed
}
Insert cell
L = {
const L = await require("leaflet@1/dist/leaflet.js");
if (!L._style) {
const href = await require.resolve("leaflet@1/dist/leaflet.css");
document.head.appendChild(L._style = html`<link href=${href} rel=stylesheet>`);
}
return L;
}
Insert cell

One platform to build and deploy the best data apps

Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.
Learn more