Measuring area of land, farm, field, home, distance, and length on the map. How to use https://yosapa.com/doc/area_meas_e.pdf Function. 1. Measure the land area. 2. Measure the distance. 3. Share information through the app. 4. Save image data. 5. Save measurement data. Can be retrieved later. Units of measurement Area. 1. ไร่-งาน-วา (Thailand) 2. Square Meter (m2) 3. Are (100m2) 4. Decare (1000m2) 5. Hectare (10,000m2) 6. Square Kilometre (km2) 7. Acre (United States) 8. Square Miles (mi2) 9