Spilhaus shoreline mapNew Jersey State PlaneCustom cartesian projectionU.S. state choroplethWorld choroplethSpike mapBubble mapChoroplethRotating orthographicOceansWinding orderOrthographic shadingSolar TerminatorU.S. airports VoronoiStar mapSolar pathRaster tilesThreshold ChoroplethMapbox Vector TilesRaster Tiles (Canvas)Raster & vector IIClipped map tilesGraticule labels (stereographic)Sketchy EarthCloud ContoursCountries by AreaVector fieldRaster & vectorVector tilesHexbin mapAntimeridian CuttingWorld AirportsWorld Airports Delaunayprojection.reflectXTesting projection visibilityNon-contiguous cartogramVersor ZoomingThree-Axis RotationContext to CurveOrthographic to equirectangularU.S. Map with Puerto RicoProjection TransitionsZoom to bounding boxZoomable Raster & VectorWorld Map (SVG)Web Mercator tilesU.S. Map (Canvas)Bivariate choroplethTissot’s indicatrixProjection comparisonCassiniWorld tourU.S. State CapitalsWorld map (canvas)U.S. MapConic Equal-AreaTransverse MercatorVersor draggingStereographicGnomonicOrthographicMercatorAzimuthal Equal-AreaAzimuthal EquidistantEquirectangularConic ConformalTobler–MercatorConic EquidistantNatural EarthEqual EarthOrthographic (SVG)Quantile Choropleth
World airports Voronoi
chart = {
const context = DOM.context2d(width, height);
const path = d3.geoPath(mutable projection, context).pointRadius(1.5);
function render() {
context.clearRect(0, 0, width, height);
context.beginPath();
path(graticule);
context.lineWidth = 0.5;
context.strokeStyle = "#aaa";
context.stroke();
context.beginPath();
path(mesh);
context.lineWidth = 0.5;
context.strokeStyle = "#000";
context.stroke();
context.beginPath();
path(sphere);
context.lineWidth = 1.5;
context.strokeStyle = "#000";
context.stroke();
context.beginPath();
path({type: "MultiPoint", coordinates: points});
context.fillStyle = "#f00";
context.fill();
}
function dragged() {
mutable projection = mutable projection;
render();
}
return d3.select(context.canvas)
.call(drag(mutable projection).on("drag.render", dragged))
.call(render)
.node();
}
mutable projection = d3.geoOrthographic()
.fitExtent([[1, 1], [width - 1, height - 1]], sphere)
.rotate([0, -30])
height = width
sphere = ({type: "Sphere"})
graticule = d3.geoGraticule10()
points = (await FileAttachment("airports.csv").csv({typed: true})).map(({longitude, latitude}) => [longitude, latitude])
mesh = d3.geoVoronoi(points).cellMesh()
d3 = require("d3@7", "d3-geo-voronoi@2")
import {drag} with {d3} from "@d3/versor-dragging"
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.
