ggplot interactive choropleth map Sankey infographic

Data visualization infographic titled "Choropleth Map Example" using a SANKEY FLOW as the dominant visual element to show progress through a geographic-data pipeline: "Raw Geographic Data" -> "Boundary Cleaning" -> "Metric Joining" -> "Classification" -> "Map Rendering" -> "Interactive Output". Show thick monochrome ink flow bands with realistic plausible illustrative values: 120 datasets entering, 104 cleaned, 96 joined, 84 classified, 72 rendered, 61 interactive-ready. Render sharp English labels on every stage, with small horizontal reference ticks and a subtle progress scale labeled "Datasets" from 0 to 120 in steps of 20, no misleading truncation. Add a secondary supporting inset choropleth map example in one corner, clearly subordinate to the Sankey, showing a fictional country divided into 8-12 regions shaded in monochrome from light gray to near-black, with legend labeled "Low value" to "High value" and caption "Example choropleth output". Add 4 key insight callouts with headline numbers, short interpretations, and small icons: "120" + "Initial geographic files collected" + database icon; "80%" + "Most inputs survive to classification" + filter icon; "61" + "Interactive-ready outputs after refinement" + monitor icon; "49%" + "Roughly half of raw inputs reach final publishable stage" + progress arrow icon. Include a compact annotation near the final node noting "Intended use: ggplot interactive" but keep it as a neutral workflow label, not a search-style phrase. Add a small SOURCE / DATA-NOTE strip at the bottom in English: "Data note: Illustrative example for infographic demonstration. Figures are illustrative and not sourced from an external authority." Visual style: editorial data journalism illustration, FT / Bloomberg-grade chart aesthetics, vector-clean infographic layout, monochrome ink palette with black, charcoal, slate, warm gray, and off-white paper background, restrained newsroom elegance, precise spacing, clean legends, subtle hairline rules, modern serif title with sans-serif labels, analytical and trustworthy mood. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no fake authoritative sources cited, no watermarks Numbers labeled "illustrative" unless the user supplied specific sourced data. No fake authoritative sources cited (do not invent "Source: Reuters 2025" — use "Illustrative example" instead). No misleading axis truncation or scale manipulation.