This choropleth map colors world countries by their economic classification using a spectral color scale, with an interactive color legend showing the categorical values. The map renders geographic boundaries and landmasses through D3’s geospatial projection and path generation, while hover effects highlight individual countries. Data is loaded from the World Atlas topojson and TSV files, processed via the `topojson` feature API, and colors are assigned using `d3.scaleOrdinal` with a `schemeSpectral` range. The view supports zoom and pan through D3’s interactive zoom behavior.