UAV REMOTE SENSING FOR MAPPING OF LAND ACQUISITION PROJECTS IN ANDHRA PRADESH: A CASE STUDY

摘要

Unmanned Aerial Vehicle (UAV) platforms are nowadays a valuable source of data for surveillance, inspection, mapping and 3D modelling. UAVs can be considered as a low cost, short & close range alternative to the classical manned aerial photogrammetry. At the current state low cost UAVs are being used mainly in mapping projects with low budgets. UAV based mapping provides not only the required accuracy at micro scale and also for the generation of elevation models in small scale areas. Rotary and fixed wing UAVs are capable of performing the photogrammetric data acquisition with amateur or single lens reflex digital cameras and it can fly in manual, semi-automated and autonomous modes. The outputs of the UAV technology includes 3D results like Digital Surface or Terrain Models (DSM/DTM),dense point clouds, textured 3D models, ortho-images, etc. In the present study, an attempt is made for mapping of different structures using UAV technology in Kovvada village, Ranastalam mandal, Srikakulam district, Andhra Pradesh for rehabilitation purpose. The abilities of UAV imageries in mapping of structure are assessed. The study reveals that the information generated on various types of structures with measurements in the village is very precise and serves the needs of the administration for disbursing compensation and rehabilitation measures in land acquisition sites, in a short duration.