Animate Changing Borders

Choose a region and a period, then create a GIF or video of the borders changing map by map. Vertical format works for YouTube Shorts, TikTok and Instagram Reels.

Notes

The animation is made in your browser; nothing is uploaded. Video is saved as MP4 where the browser supports it, otherwise as WebM. You are free to share the result; please keep the chronicamaps.com credit visible.