This example prepares Dutch parking facility data from the RDW API for visualization. It fetches an overview of parking locations, selects the first ten, and retrieves detailed information for each using `Promise.all` with `d3.json`. The code logs unique values for properties like `limitedAccess` and capacity, setting up scales and axes for future bar charts. It uses D3 v6, an SVG container, and a proxy URL to handle cross-origin requests.