This visualization displays a colorful map of MIT campus buildings sourced from OpenStreetMap, with each structure filled using a categorical color scale based on its tags. The example uses D3 v4 and TopoJSON to load and render the geographic data as SVG paths via `d3.geoPath` with a Mercator projection, while `d3.zoom` enables interactive pan and zoom. The map is fitted to the browser window and redrawn on resize, and building colors are assigned by `d3.scaleOrdinal` with `d3.schemeCategory10`, with each path’s fill derived from the JSON-stringified property tags.