Albers-USA projection

Use the albers-usa projection for U.S.-centric maps. This projection is equal-area for the continental United States and Hawaii. Note however that the scale for Alaska is diminished: it is projected at 0.35× its true relative area.

Plot.plot({
  projection: "albers-usa",
  marks: [
    Plot.geo(nation),
    Plot.geo(statemesh, {strokeOpacity: 0.2})
  ]
})

const us = await FileAttachment("data/us-counties-10m.json").json().then(display);
const nation = topojson.feature(us, us.objects.nation);
const statemesh = topojson.mesh(us, us.objects.states);