This interactive D3.js map displays the state of Texas with its county boundaries, major city markers, and labels. Built with D3 v7 and TopoJSON, it uses d3.geoMercator and d3.geoPath to project geographic data from the US-Atlas TopoJSON files. The map renders as SVG, with county paths colored sequentially using d3.scaleSequential and d3.interpolateGreens, while hover effects and tooltips reveal county FIPS codes.