🛰️ Satellite intelligence for every farmer, in every language, on every phone.
Free forever · Powered entirely by open satellite data · No subscription needed

 

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🌿 What Is Khet Map?

Khet Map (खेत मैप) is a free, open-source satellite intelligence platform built for Indian farmers. Using data from the European Space Agency's Sentinel satellites, NASA, and Copernicus, it brings space-grade crop monitoring to the palm of your hand — in Hindi, Telugu, Kannada, Tamil, and English.

"अपना खेत, अपना नक्शा" — Your farm, your map.

🎯 The Problem We Solve

Traditional Farming	With Khet Map
Walk entire farm to detect pest/disease	See crop stress from satellite in seconds
Guess irrigation timing	Get data-driven ET₀ + soil moisture advice
No record of field boundaries	Draw & save permanent field map
Wait for extension officer visit	Ask HARI AI anytime in your language
No flood early warning	Sentinel-1 SAR detects waterlogging instantly
Pay for agri-apps	Completely free, forever

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🛰️ Satellite Data Sources

Satellite	Revisit	Resolution	What Farmers Get
Sentinel-2 (ESA)	~5 days	10 m	NDVI · EVI · NDWI · Crop health score
Sentinel-1 SAR (ESA)	6–12 days	10 m	Waterlogging · Flood maps · Rice mapping
Landsat 8/9 (USGS)	16 days	30 m + thermal	Long-term trends · Water stress (CWSI)
MODIS/VIIRS (NASA)	Daily	250–500 m	Regional benchmarks · Drought alerts
Open-Meteo + NASA POWER	Hourly	High-res	Rainfall · ET₀ · Soil temp · Smart irrigation
DEM/SRTM	Static	30 m	Slope · Drainage · Terrain analysis

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✨ Core Features

🗺️ Field Mapping

• Draw polygons directly on satellite basemap
• Upload KML / GeoJSON / CSV field boundaries
• Copernicus-style polygon selection — click-to-select parcels
• Multi-field management — unlimited farms saved to cloud
• GPS "My Location" with auto-zoom to your farm
• Area calculator (hectares & cents displayed live)

🌿 Crop Health (NDVI & Beyond)

• Live NDVI overlay from Sentinel-2 (updated every 5 days)
• Color scale: 🔴 Stressed → 🟡 Moderate → 🟢 Healthy
• NDVI trend graph — last 30 days per field
• EVI, NDWI, REIP indices available
• Health Score 0–100 with actionable alerts
• Before/After satellite comparison slider

💧 Water & Weather Intelligence

• Sentinel-1 SAR waterlogging detection (works through clouds & monsoon)
• Flood mapping with early-warning alerts
• Hourly weather: rainfall, temperature, humidity
• ET₀ (evapotranspiration) — tells you exactly when to irrigate
• Soil moisture proxy from NASA POWER

🤖 HARI AI — Holistic Agricultural Response Intelligence

• Voice + text input in Hindi, Telugu, Kannada, Tamil, English
• Answers real farmer questions:
  • "Mera NDVI kam kyun hai?" → detailed explanation + fix
  • "Aaj irrigation karna chahiye?" → yes/no + quantity
  • "Kab harvest karu?" → crop-specific calendar advice
• Powered by your farm's live satellite + weather data
• Works offline for common queries

📱 Android PWA

• Install from Chrome browser — no Play Store needed
• Offline map tile cache
• Push notifications for crop alerts & weather warnings
• Works on any Android phone (Android 7+)
• Optional: Capacitor .apk build for Play Store

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🏗️ Tech Stack

┌─────────────────────────────────────────────────────┐
│             KHET MAP — Full Architecture            │
├──────────────┬──────────────────────────────────────┤
│  AUTH        │  Firebase Auth                       │
│              │  ├── Google OAuth                    │
│              │  └── Phone OTP (SMS, +91 India)      │
├──────────────┼──────────────────────────────────────┤
│  MAP ENGINE  │  Leaflet + react-leaflet             │
│              │  ├── ESRI World Imagery (base)       │
│              │  ├── Copernicus NDVI WMS (Sentinel-2)│
│              │  ├── Sentinel-1 SAR WMS              │
│              │  ├── NASA GIBS MODIS overlay         │
│              │  └── Open-Meteo weather layer        │
├──────────────┼──────────────────────────────────────┤
│  DATABASE    │  Firebase Firestore                  │
│              │  ├── /users/{uid}                    │
│              │  ├── /farms/{uid}/{farmId}           │
│              │  └── /alerts/{uid}                   │
├──────────────┼──────────────────────────────────────┤
│  AI LAYER    │  HARI — Crop Advisor AI              │
│              │  ├── Rule-based (offline)            │
│              │  └── Gemini API (online, enhanced)   │
├──────────────┼──────────────────────────────────────┤
│  DELIVERY    │  PWA (Chrome install)                │
│              │  └── Capacitor APK (optional)        │
└──────────────┴──────────────────────────────────────┘

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🚀 Getting Started

Prerequisites

• Node.js 18+
• Firebase project (free Spark plan)
• Copernicus Data Space account (free — register here)

1. Clone & Install

git clone https://github.com/virahitvin8/khetmap.git
cd khetmap
npm install

2. Set Up Environment Variables

cp .env.example .env

Edit .env:

# Firebase
VITE_FIREBASE_API_KEY=your_api_key
VITE_FIREBASE_AUTH_DOMAIN=your_project.firebaseapp.com
VITE_FIREBASE_PROJECT_ID=your_project_id
VITE_FIREBASE_STORAGE_BUCKET=your_project.appspot.com
VITE_FIREBASE_MESSAGING_SENDER_ID=your_sender_id
VITE_FIREBASE_APP_ID=your_app_id

# Copernicus Data Space (Sentinel-2 NDVI)
VITE_COPERNICUS_INSTANCE_ID=your_instance_id
VITE_COPERNICUS_CLIENT_ID=your_client_id

# Optional: Gemini AI for HARI
VITE_GEMINI_API_KEY=your_gemini_api_key

3. Run Locally

npm run dev
# → http://localhost:5173

4. Install on Android

Open http://your-local-ip:5173 in Android Chrome → tap ⋮ → Add to Home Screen

5. Build Production

npm run build
npm run preview

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📱 Android APK (Optional — Capacitor)

npm install @capacitor/core @capacitor/android
npx cap init KhetMap com.khetmap.app
npx cap add android
npm run build
npx cap sync
npx cap open android   # Opens Android Studio → Build → Generate Signed APK

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📊 Developer Stats

  

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🗺️ Roadmap

Phase 0 ✅  Foundation — Vite + React + Firebase + Map skeleton
Phase 1 🔄  Auth — Google OAuth + Phone OTP + Premium landing page
Phase 2 🔄  Map Intelligence — Copernicus NDVI WMS + KML/CSV upload
Phase 3 🔜  Farms Dashboard — Health scores + NDVI trend charts
Phase 4 🔜  HARI AI — Voice + text crop advisor
Phase 5 🔜  PWA — Android installable + offline support
Phase 6 🔜  i18n — Hindi, Telugu, Tamil, Kannada
Phase 7 🔜  Play Store — Capacitor APK release

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🌍 Data Credits & Open-Source Acknowledgements

Source	Usage	License
ESA Copernicus / Sentinel-2	NDVI, EVI, NDWI overlays	Free / Open
ESA Sentinel-1	SAR waterlogging detection	Free / Open
NASA POWER	Solar radiation, wind, ET₀	Public Domain
Open-Meteo	Hourly weather data	CC BY 4.0
USGS Landsat 8/9	Long-term thermal trends	Public Domain
OpenStreetMap	Street map basemap	ODbL
ESRI World Imagery	Satellite basemap tiles	ESRI Terms
Leaflet	Interactive map engine	BSD-2
Firebase	Auth, Firestore, Storage	Google ToS

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🤝 Contributing

Contributions are very welcome! Especially:

• 🌐 Translations (Hindi, Telugu, Tamil, Kannada, Marathi)
• 🐛 Bug reports from farmers testing in real fields
• 🛰️ New satellite index implementations (LAI, SAVI, VARI)
• 📱 UI/UX improvements for low-end Android devices

# Fork the repo, then:
git checkout -b feature/your-feature-name
git commit -m "feat: add your feature"
git push origin feature/your-feature-name
# → Open Pull Request

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📄 License

MIT License — Free to use, modify, and distribute.

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_{Built with ❤️ for Indian farmers · Powered by open satellite data · Free forever
🛰️ Sentinel-2 · Sentinel-1 · Landsat · MODIS · NASA POWER · Open-Meteo}