PrairieMap is a chronological map tool. Import a folder of map images, draw faction territories on a Konva canvas, add labels and per-frame intel, then play back or export a timelapse.
The frontend is React 19, Vite, TypeScript, and Tailwind; the backend is FastAPI with Shapely for polygon overlap transfer and ffmpeg for MP4 compile. Map image bytes stay in the browser via the folder picker; project JSON and geometry mutations go through the API.
Features include a three-panel timeline/canvas/intel layout, duplicate and reorder frames, markdown notes, faction stats, and JSON import/export — so war history becomes a shareable video instead of a paragraph.
DEMO