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The Submit and Skip bar collapsed to zero height on an iPad Pro 10.5 in landscape: the map card ran 60px past where it should stop, which is exactly the bar plus its gap. From lg up the bar sat four indefinite-height containers deep -- a min-h-dvh column, two flex-1 min-h-0 boxes, an implicit auto grid row -- and was the shrinkable sibling of a flex-1 map. Safari before 18 resolves that chain by squeezing the auto-sized item to nothing, and that device caps at iPadOS 17. Give the map and controls column explicit grid tracks instead, so a stretched row sizes the map and an auto row sizes the bar, with no flex free-space maths in between. The bar and the header are also marked shrink-0, and the content grid declares its single row rather than growing an implicit one. The result dialog is centred with a translate, so a viewport unit that over-reports the visible area hides Next Round below the fold rather than cropping the bottom edge. Clamp it with svh, which is never larger than what is on screen.
VNGeoGuessr
A GeoGuessr clone focused on Vietnamese locations with accurate boundary detection and anti-cheat security. Play geolocation guessing games across a region tree covering the whole country using real street-level imagery.
🎮 Features
- Region Tree: Whole country, 5 provinces, 61 districts — including Da Lat (Lam Dong) and Duc Hoa (Long An)
- 360° Street View: Mapillary panoramic images with PhotoSphere viewer
- Anti-Cheat Security: Server-side session management prevents cheating
- Distance-Based Scoring: 0-5 point system based on accuracy
- Persistent Leaderboards: Redis-powered top 200 player rankings
- Accurate Boundaries: Nominatim API + Turf.js for precise city detection
📚 Documentation
For detailed information about this project, see the documentation in /docs/:
- Project Overview - Project summary and key characteristics
- Features - Complete feature list and game mechanics
- Tech Stack - Technology stack and dependencies
- Development Guidelines - Development setup and coding standards
- Game Flow - Complete gameplay flow documentation
- Project Structure - Codebase organization and architecture
🚀 Getting Started
Prerequisites
- Node.js 24+
- npm 11+
- Redis server (sessions and leaderboards)
- Postgres database (panorama index; Neon in production)
Development
# Install dependencies
npm install
# Start development server
npm run dev
# Build for production
npm run build
# Start production server
npm start
# Run linting
npm run lint
Open http://localhost:3000 to play the game.
🏗️ Built With
- Frontend: Next.js 16 + React 19 + Tailwind CSS 4
- Street View: Mapillary API + PhotoSphere Viewer
- Maps: Leaflet + OpenStreetMap
- Geographic Data: Nominatim API + Turf.js
- Storage: Neon Postgres (panorama index) + Upstash Redis (leaderboards and game sessions)
- UI Components: shadcn/ui
🎯 How to Play
- Enter your username
- Pick a region from the country/province/district tree
- View the 360° street panorama
- Place your guess on the map
- Earn points based on accuracy (closer = more points)
- Compete for the top 200 leaderboard spots!
📋 Development Notes
- JavaScript Only: No TypeScript files
- Individual Parameters: Functions use separate parameters, not object destructuring
- Server-Side Security: Game coordinates never sent to client
- Session Management: Automatic cleanup after 30 minutes
🤝 Contributing
This project follows specific development guidelines. Please read the Development Guidelines before contributing.