This example shows a zoomable world map rendered as an SVG, with country names displayed as hover tooltips. The visualization uses a Natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath`, with geographic data loaded from the World Atlas TopoJSON and country names from its accompanying TSV file. The map supports pan and zoom through `d3.zoom`, and the code includes a commented-out `d3.behavior.zoom` variant. Country boundaries are drawn as light green paths with black strokes, while the ocean sphere is filled blue.