ICE-8 presents a pair of interactive SVG choropleth maps showing world GDP and US state values. The world map projects Natural Earth TopoJSON countries with a Natural Earth projection and uses a green sequential color scale, while the US map uses an Albers USA projection. Both maps use `d3.geoPath`, TopoJSON features, and tooltip interactions. Data is joined from remote CSV sources, with JavaScript fetch and D3’s data loaders handling URL fallbacks.