This example demonstrates how to toggle between distinct French public-sector web applications by sharing a single geographic coordinate. It showcases a catalog of links that parameterize each app’s URL with the same latitude, longitude, and zoom level. The core logic is not a chart but a curated list of permalinks embedded in a Vue.js interface. The code directly references services like Géorisques, ARCEP’s fiber map, and Géoportail Urbanisme, highlighting that each site has its own URL scheme. This approach is presented as a template for adding cross-domain navigation to other public-facing tools.