The data behind the Twinton globe: every ship, plane, storm, earthquake and wildfire it shows, as plain JSON files you can fetch from any page, script or simulation. No key, no sign-up. Keep the source line of each feed when you show its data.
colsschema, fetched_unix (when it was made), source and cols; each row is an array in the order of cols."modelled": true. Show that on your screen too.