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End-to-end geospatial data platform. An offline-first Android app captures field data with no network dependency. Its boundary mapping module traces plot perimeters from GPS walks, using Kalman-filtered location to stay accurate under dense canopy, geofenced loop closure (a 20 m return zone after 50 m of travel), proximity-checked pause/resume, and crash recovery that keeps every point captured. A web platform manages and visualises the collected data, and inventory mapping turns it into species distribution layers by fusing Sentinel-1 SAR and Sentinel-2 imagery with terrain covariates. Deployed across 7+ states with 500K+ field data points collected.