This interactive choropleth map of Spain displays the percentage of the population served by health sectors in Aragon for 2022, with colored regions representing value ranges and a legend for interpretation. The visualization uses D3 v5 with topojson to load geographic boundaries, applies a Mercator projection through `d3.geoMercator` and `d3.geoPath`, and renders the map as an SVG. Data is parsed from a CSV file hosted on GitHub, containing population counts per sector, which are converted into percentage values. The map includes animations and dynamic color scaling via `d3.scaleThreshold`, with interactivity for selecting regions.