This example demonstrates how to fetch and explore parking-location data from the RDW open-data API, logging unique area and usage identifiers to the console. It uses the Fetch API to retrieve a JSON endpoint (`https://opendata.rdw.nl/resource/t5pc-eb34.json`), then maps over the objects to extract values from specific columns. Custom functions filter the data, list unique values, and count empty strings, revealing data-quality issues and the diversity of geographic regions and usage types.