# Why don't you up to date

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Rito Yamasaki](https://cerebralvalley.ai/u/Ritchy)
- **GitHub:** https://github.com/0319-2004/before-its-built
- **Demo video:** https://youtu.be/dORAQbnTOG4
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2061

Before It's Built turns a photo of a construction site's planning notice into the future building — standing on the city's 3D model, before it's built.

The earliest, most accurate record of how a neighborhood will change is bolted to a construction fence: a sign reading "height 25 m, 16 floors" that no resident can actually picture. People grasp the impact on their sunlight, view, and street only after the explanation meeting — or after the crane is already up. Buyers sign before a tower appears across the street. And official 3D city models like Japan's PLATEAU are re-surveyed only every few years, so the places changing fastest are the most out of date — stale ground truth for planning, delivery robots, or any simulation.

Our fix: snap the notice board. An AI agent finds the sign, reads it,          cross-checks it against and — only when confident — stands the planned building up on the PLATEAU digital twin, next to the      buildings being demolishss from their own streetand check, before construction starts, whether it will cast a winter shadow on their home. It's the citm the street.
                                                                               Live for Meguro, Tokyo o(web-only). Privacy bydesign: the board also carries personal names (owner, architect, contractor) — we never extract or store them.

## More from Meta Global AI Developer Hackathon

- [Jaime's Team](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2058)
- [Odin's Realm](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2059)
- [VELTRIX](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2060)
- [Gabriel Salem](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2062)
- [Marstians](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2063)
- [Ziba Intelligence](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2064)

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Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2061. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt