Launched this week

Seoul 3D Atlas v5.4

Launched this week

Explore Seoul in 3D - transit, landmarks, tourism, city data

5 followers

Explore Seoul in 3D - transit, landmarks, tourism, city data

5 followers

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Maps and GPS

Launching Seoul 3D Atlas, an interactive 3D experience for exploring how Seoul looks, moves, and changes. Built iteratively with GPT-6 Astra, it combines city-scale 3D visualization, transit, tourism, multilingual UX, and environmental effects in one web experience.

Free

Launch tags:Travel•Maps•Data Visualization

Launch Team / Built With

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Promoted

OpenAI

GPT-6 Astra Challenge

What became possible in your product with Astra that was not practical before?

Maker

Astra made it practical for me to build and continuously evolve a city-scale product as a solo developer. Before Astra, combining hundreds of thousands of buildings, transportation, tourism data, multilingual UX, weather, seasons, and interactive 3D features would have required much more time or a larger team. The biggest change was iteration speed. Astra helped me understand the existing codebase, implement features, debug regressions, connect data sources, and continuously refine the UX. This speed allowed Seoul 3D Atlas to grow from a simple visualization into a much broader interactive city experience. When I shared the project on X, it received 330K+ views—an achievement that demonstrated strong public interest in this new way of exploring a city.

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1d ago

Maker

📌

Hi Product Hunt! 👋 I’m Jinho, the maker of Seoul 3D Atlas. This project started with a simple question: what if Seoul could be explored as a living 3D city instead of a flat map? The first version focused on visualizing the city itself. From there, the project kept evolving through repeated use and feedback. I added subway and bus routes, landmarks, hotels, cultural sites, multilingual navigation, multiple currencies, weather, seasons, and day/night experiences. Today, Seoul 3D Atlas brings together more than 267,000 buildings and multiple layers of public city data in one interactive web experience. One of the most unexpected moments came when I shared the project on X (Twitter). The post and demo reached more than 330,000 views, and the reactions helped convince me that people were genuinely interested in exploring a city this way. What makes this launch especially meaningful to me is how it was built. I used the latest version of GPT-6 Astra throughout the development process—not just to generate an initial prototype, but as part of an ongoing engineering workflow. I repeatedly defined new requirements, tested results, found problems, refined the UX, debugged implementation issues, and evolved the product over many iterations. For me, the most interesting part of working with Astra was seeing how AI-assisted development changes when the project keeps growing and the requirements keep changing. Seoul 3D Atlas is still an experiment rather than a perfect digital twin. My goal is to explore a new way of experiencing a city by combining 3D visualization, transportation, tourism, and urban data in one place. I’d love to hear what you think—and what you’d explore first: transit, landmarks, tourism, weather, or just flying around Seoul. 🚇🏙️🌧️ Thanks for checking it out!

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1d ago

Forum Threads

p/3d-atlas-v5-4

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1d ago

I built a 3D version of Seoul with GPT-6 Astra — and it reached 330K+ views on X

Hi Product Hunt

I ve been experimenting with a simple idea: What if you could explore Seoul as a living 3D city instead of a flat map?

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