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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Null Island(s)</title>
<meta property="og:description" content="Use flyTo with flyOptions to slowly zoom to a location." />
<meta charset='utf-8'>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel='stylesheet' href='https://unpkg.com/maplibre-gl@4.5.0/dist/maplibre-gl.css' />
<script src='https://unpkg.com/maplibre-gl@4.5.0/dist/maplibre-gl.js'></script>
<style>
body { margin: 0; padding: 0; }
html, body, #map { height: 100%; }
</style>
</head>
<body>
<style>
#fly {
display: block;
position: absolute;
top: 20px;
left: 50%;
transform: translate(-50%);
width: 50%;
height: 40px;
padding: 10px;
border: none;
border-radius: 3px;
font-size: 12px;
text-align: center;
color: #000;
background: #ffff00;
}
#more {
display: block;
position: absolute;
bottom: 40px;
right: 10px;
padding: 10px;
border: none;
font-size: 12px;
font-family: Helvetica, Arial, sans-serif;
text-align: center;
color: #000;
background: #ffff00;
}
a {
color: #000;
text-decoration: none;
}
</style>
<div id="map"></div>
<br />
<button id="fly">Zoom in/out</button>
<div id="more"><a href="https://github.com/stamen/null-island/">Learn more</a></div>
<script>
const start = 23.5;
const end = 2;
const target = [0, 0];
const map = new maplibregl.Map({
container: 'map',
hash: true,
style:
'https://tiles.stadiamaps.com/styles/stamen_toner.json',
center: target,
maxZoom: 23.5,
zoom: 18
});
let scale = new maplibregl.ScaleControl({
maxWidth: 200,
unit: 'metric'
});
map.addControl(scale);
let scale2 = new maplibregl.ScaleControl({
maxWidth: 200,
unit: 'imperial'
});
map.addControl(scale2);
map.addControl(new maplibregl.FullscreenControl({container: document.querySelector('body')}));
map.addControl(new maplibregl.NavigationControl());
map.once("load", () => {
map.addSource("null-island-nixta-label-point", {
type: "geojson",
data: {
'type': 'FeatureCollection',
'features': [
{
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': [0, -0.05]
},
'properties': {
'name':
"Null Island\nnixta's version circa 2014\n63.8 km²",
}
}
]
}
});
map.addSource("null-island-natural-earth-v4-label-point", {
type: "geojson",
data: {
'type': 'FeatureCollection',
'features': [
{
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': [0, -0.008]
},
'properties': {
'name':
"Null Island\nNatural Earth v4.1 circa 2018\n1 km²",
}
}
]
}
});
map.addSource("null-island-original-label-point", {
type: "geojson",
data: {
'type': 'FeatureCollection',
'features': [
{
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': [0, -0.0004]
},
'properties': {
'name':
"Null Island\noriginal version circa 2010\n3,433 m²",
}
}
]
}
});
map.addSource("null-island-natural-earth-v1-label-point", {
type: "geojson",
data: {
'type': 'FeatureCollection',
'features': [
{
'type': 'Feature',
'geometry': {
'type': 'Point',
'coordinates': [0, -0.000008]
},
'properties': {
'name':
"Null Island\nNatural Earth v1.3 circa 2011\n1 m²",
}
}
]
}
});
map.addSource("null-island-nixta", {
type: "geojson",
data: "data/null-island-nixta.geojson"
});
map.addLayer({
id: "null-island-nixta-layer",
type: "fill",
source: "null-island-nixta",
paint: {
"fill-color": "#cccccc",
"fill-opacity": 1,
"fill-outline-color": "black",
}
});
map.addLayer({
id: "null-island-nixta-label",
type: "symbol",
source: "null-island-nixta-label-point",
minzoom: 9,
maxzoom: 13,
layout: {
"symbol-placement": "point",
"text-font": ["Inter Regular"],
"text-field": ['get', 'name'],
"text-max-width": 100,
"text-size": [
'interpolate',
['exponential', 2],
['zoom'],
9, 6,
13, 96
]
},
paint: {
"text-color": "white",
"text-opacity": [
'interpolate',
['linear'],
['zoom'],
9, 0,
10, 1,
12, 1,
13, 0
]
}
});
map.addSource("null-island-natural-earth-v4", {
type: "geojson",
data: "data/null-island-natural-earth-v4.geojson"
});
map.addLayer({
id: "null-island-natural-earth-v4-layer",
type: "fill",
source: "null-island-natural-earth-v4",
paint: {
"fill-color": "#dddddd",
"fill-opacity": 1,
"fill-outline-color": "black",
}
});
map.addLayer({
id: "null-island-natural-earth-v4-label",
type: "symbol",
source: "null-island-natural-earth-v4-label-point",
minzoom: 12,
maxzoom: 16,
layout: {
"symbol-placement": "point",
"text-font": ["Inter Regular"],
"text-field": ['get', 'name'],
"text-max-width": 100,
"text-size": [
'interpolate',
['exponential', 2],
['zoom'],
11, 6,
16, 96
]
},
paint: {
"text-opacity": [
'interpolate',
['linear'],
['zoom'],
12, 0,
13, 1,
15, 1,
16, 0
]
}
});
map.addSource("null-island-original", {
type: "geojson",
data: "data/null-island-original.geojson"
});
map.addLayer({
id: "null-island-original-layer",
type: "fill",
source: "null-island-original",
paint: {
"fill-color": "#eeeeee",
"fill-opacity": 1,
"fill-outline-color": "black",
}
});
map.addLayer({
id: "null-island-original-label",
type: "symbol",
source: "null-island-original-label-point",
minzoom: 15,
maxzoom: 20,
layout: {
"symbol-placement": "point",
"text-font": ["Inter Regular"],
"text-field": ['get', 'name'],
"text-max-width": 100,
"text-size": [
'interpolate',
['exponential', 2],
['zoom'],
15, 3,
20, 96
]
},
paint: {
"text-opacity": [
'interpolate',
['linear'],
['zoom'],
15, 0,
16, 1,
19, 1,
20, 0
]
}
});
map.addSource("null-island-natural-earth-v1", {
type: "geojson",
data: "data/null-island-natural-earth-v1.geojson"
});
map.addLayer({
id: "null-island-natural-earth-v1-layer",
type: "fill",
source: "null-island-natural-earth-v1",
paint: {
"fill-color": "white",
"fill-opacity": 1,
"fill-outline-color": "black",
}
});
map.addLayer({
id: "null-island-natural-earth-v1-label",
type: "symbol",
source: "null-island-natural-earth-v1-label-point",
minzoom: 21,
layout: {
"symbol-placement": "point",
"text-font": ["Inter Regular"],
"text-field": ['get', 'name'],
"text-max-width": 100,
"text-size": [
'interpolate',
['exponential', 2],
['zoom'],
20, 3,
24, 24
]
},
paint: {
"text-opacity": [
'interpolate',
['linear'],
['zoom'],
21, 0,
22, 1
]
}
});
map.showCollisionBoxes(true);
});
let isAtStart = true;
document.getElementById('fly').addEventListener('click', () => {
// depending on whether we're currently at point a or b, aim for
// point a or b
const targetZoom = isAtStart ? end : start;
// and now we're at the opposite point
isAtStart = !isAtStart;
map.flyTo({
// These options control the ending camera position: centered at
// the target, at zoom level 9, and north up.
center: target,
zoom: targetZoom,
bearing: 0,
// These options control the flight curve, making it move
// slowly and zoom out almost completely before starting
// to pan.
speed: 1, // make the flying slow
curve: 1, // change the speed at which it zooms out
// This can be any easing function: it takes a number between
// 0 and 1 and returns another number between 0 and 1.
easing (t) {
return t;
},
// this animation is considered essential with respect to prefers-reduced-motion
essential: true
});
});
</script>
</body>
</html>