Rafael Guevara pulls every licence plate reader camera in Texas from OpenStreetMap's Overpass API and turns 16,750 points into a Tableau dashboard. One parameter switches between a density map, a custom shape map and a dual-layer map with city totals. He gives step-by-step instructions for a doughnut chart with a Texas silhouette in the middle, then shares three handy extras: an info icon built from a one-mark sheet, a clickable header image using a transparent floating sheet, and a True/False filter action that removes the highlight after a click.