This example displays a world map using an orthographic projection, with each country colored according to its economy classification from the World Atlas dataset. The visualization loads geographic data as TopoJSON and country metadata as TSV, then joins them by ISO code. It renders the sphere and country boundaries as SVG paths using `d3.geoPath`, assigns colors via `d3.scaleOrdinal` with the `schemeSpectral` range, and adds hover effects and zooming through `d3.zoom`.