map = {
const context = DOM.context2d(width, height);
const path = d3.geoPath(projection, context);
context.beginPath(), path(land), context.fill();
context.beginPath(),
path(graticule),
(context.strokeStyle = "#aaa"),
(context.globalAlpha = 0.4),
context.stroke();
context.beginPath(),
path(sphere),
(context.strokeStyle = "#333"),
context.stroke();
return context.canvas;
}