# Area.tn — Precision Map & Agriculture Tool Suite
# https://area.tn
# Last updated: 2026-02-15

## About
Area.tn is a free suite of professional web tools for land measurement, precision agriculture, coordinate conversion, livestock management, and green sustainability. All tools run in the browser with no login required. Multilingual: English, French, Spanish, Arabic.

## Tools

### Area Calculator (Main App)
> URL: https://area.tn/
> Description: Interactive satellite map area calculator. Draw polygons on satellite imagery to calculate precise geodesic area. Supports multiple areas, undo/redo, save, metric (m², hectares, km²) and imperial (ft², acres, mi²) units.
> Use-cases: Measure land area, calculate property size, farm field measurement, construction site planning.
> Keywords: area calculator, map calculator, acreage calculator, measure land area, satellite area measurement

### Radius Map
> URL: https://area.tn/radius-map
> Description: Draw circles on a map by radius (km/mi). Plan service areas, delivery zones, and proximity analysis with custom radius and location search.
> Keywords: radius map, draw circle on map, distance radius, service area map

### Elevation Finder
> URL: https://area.tn/elevation-finder
> Description: Find elevation/altitude of any point on Earth. Click map or search address to get elevation in meters or feet.
> Keywords: elevation finder, altitude map, height above sea level, topographic map

### Distance Ruler
> URL: https://area.tn/distance-ruler
> Description: Measure distances between points on a map. Multi-point paths, geodesic calculations, metric and imperial units.
> Keywords: distance ruler, measure distance on map, map ruler, geodesic distance

### Property Line Finder
> URL: https://area.tn/property-line-finder
> Description: Identify and trace property boundaries on satellite imagery. Calculate lot sizes and understand parcel boundaries.
> Keywords: property line finder, property boundary map, lot line map, parcel boundary

### Solar Roof Analyzer
> URL: https://area.tn/solar-roof-analyzer
> Description: Estimate solar panel potential for any roof. Calculates usable roof area, solar irradiance, annual energy production (kWh), CO2 savings, and financial ROI.
> Keywords: solar roof calculator, solar panel estimator, roof solar potential, solar energy calculator

### NPK Mixer (Fertilizer Calculator)
> URL: https://area.tn/npk-mixer
> Description: Calculate custom fertilizer blends to reach target NPK (Nitrogen, Phosphorus, Potassium) ratios. Multiple fertilizer sources, nutrient targets in PPM, mixing ratios for precision agriculture.
> Keywords: NPK calculator, fertilizer mixer, nutrient calculator, fertilizer blend calculator

### Seed Rate Pro
> URL: https://area.tn/seed-rate
> Description: Calculate seeding rates, seed quantities, and costs for any crop. Custom seed pricing per variable quantities (1, 100, 1000, 10000 seeds), population density, and total cost estimation.
> Keywords: seed rate calculator, seeding rate, seeds per acre, planting rate calculator

### Coordinate Converter
> URL: https://area.tn/coord-converter
> Description: Convert between coordinate systems: Decimal Degrees (DD), Degrees Minutes Seconds (DMS), Universal Transverse Mercator (UTM), and Military Grid Reference System (MGRS). Single conversion and batch processing via paste or CSV/TXT file upload. WGS84 datum.
> Keywords: coordinate converter, DD to DMS, UTM to lat long, MGRS converter, batch coordinate conversion

### Stocking Rate Calculator
> URL: https://area.tn/stocking-rate
> Description: Calculate livestock carrying capacity and stocking rates. Supports 7 animal types (cow, bull, yearling, calf, sheep, goat, horse) with standard Animal Unit Equivalents (AUE). Pasture area, forage production, utilization rate, herd composition, max AU gauge, and recommendations.
> Keywords: stocking rate calculator, cattle per acre, carrying capacity, animal unit, rotational grazing calculator

### Rainwater Harvesting Calculator
> URL: https://area.tn/rainwater-calculator
> Description: Estimate rainwater collection potential from roofs and surfaces. Interactive map for drawing catchment areas on satellite imagery. Automatic rainfall data fetch, 11 surface types with runoff coefficients, cistern/barrel sizing, environmental equivalencies, and annual cost savings. Formula: Gallons = Area(sqft) × Rainfall(in) × 0.623 × Runoff Coefficient.
> Keywords: rainwater harvesting calculator, rain barrel size, stormwater runoff calculator, cistern sizing, green infrastructure

## Technical Details
- Stack: React, Vite, Tailwind CSS, Leaflet (maps)
- Map tiles: ArcGIS World Imagery (satellite), OpenStreetMap (road)
- APIs: Open-Meteo (weather/rainfall), Nominatim (geocoding)
- No backend required — all calculations run client-side
- GDPR compliant with cookie consent
- Google Analytics 4 with Consent Mode v2

## Contact
- Support: https://buymeacoffee.com/jounayd