path = d3.geoPath().projection(projection);
projection = d3.geoIdentity().fitSize([width, height], stateData[0]);
stateData = topojson.feature(usData, usData.objects.states).features.filter((d) => d.id === selectedStateId);
countiesData = topojson.feature(usData, usData.objects.counties).features;
usData = await d3.json('https://d3js.org/us-10m.v2.json')
topojson = require('topojson-client@3')
d3 = require("d3@5")
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.
