Visualization toolmaker. Founder @observablehq. Creator @d3. Former @nytgraphics. Pronounced BOSS-tock.
Topographic MappingBubble mapChoroplethAccess to Family planningMD Counties Total Cases MapTendance de la production des déchets en Union EuropéenneAndy's Walgreens COVID-19 Tracker TrackerElection Maps for Incomplete ResultsA better U.S. house election results map?1983 Mayoral Election, Dot density mapsMastodon 🐘Cheat sheet bertinBertin.js: regular squaresWaterlinesNeumorphism Contour Density MapCartographic DoodlesStars and constellationsPlot: Grid choroplethHello Polygon MorphingMapping with pie chartsU.S. Geographic DataHow big are countries... like really!AttitudeB&W ChoroplethWeb Mercator Tile VisibilityMARTINI: Real-Time RTIN Terrain Mesh"Magnifying-Glass" projectionsTissot's indicatrixAntipodal mapMapping gridded data with a Voronoi diagramUrbano Monti’s Planisphere (1587)Bivariate choroplethDIY HillshadeMapbox Map MakerWorld tourHillshaderSimplified Earth with curved shapesHexbin mapInner glowNicolosi vs. StereographicData-driven projections: Darwin's worldSatellite ground track visualizerDirection to shoreHello, OpenLayers!U.S. airports VoronoiHello, NYC Geosearch API!Mapbox Fly-ToSpilhaus shoreline mapWalmart’s growthHow well does population density predict U.S. voting outcomes?Drawing maps from geodata with D3 & ObservableHexgrid maps with d3-hexgridTissot's indicatrixWorld airports VoronoiSwiss Elevation Line GraphsVector tilesVersor draggingOrthographicSolar TerminatorStreaming ShapefilesFake GlobesPeirce Quincuncial🍃 LeafletU.S.G.S. World Earthquake MapUsing Mapbox GL JSUsing Google Maps
A Map of Every Building
map = svg`<svg viewBox="0 0 ${width} ${height}" style="width:100%;height:auto;">${tile().map(([x, y, z]) => {
const buildings = svg`<path>`;
const water = svg`<path fill="none" stroke="cyan" stroke-width="0.5">`;
fetch(`https://tile.nextzen.org/tilezen/vector/v1/512/all/${z}/${x}/${y}.json?api_key=${key}`)
.then(response => response.json())
.then(data => {
buildings.setAttribute("d", path(data.buildings));
water.setAttribute("d", path({
type: "FeatureCollection",
features: data.water.features.filter(d => d.properties.boundary)
}));
});
return svg`${buildings}${water}`;
})}</svg>`
projection = d3.geoMercator()
.center([-122.4183, 37.7750])
.scale(Math.pow(2, 21) / (2 * Math.PI))
.translate([width * 0.60, height * 0.15])
tile = d3.tile()
.tileSize(512)
.size([width, height])
.scale(projection.scale() * 2 * Math.PI)
.translate(projection([0, 0]))
.zoomDelta(2)
key = "jdPwBXkWSB-v5_CPQYDiIQ" // Sign up for an API key: https://www.nextzen.org
path = d3.geoPath(projection)
width = 954
height = Math.round(width * 2)
d3 = require("d3-geo@1", "d3-tile@1")
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.