Q1. Write short notes on the following:
- a) Importance of fiducial marks and principal points in aerial photographs (300 words)
- b) LiDAR remote sensing and its application potential (300 words)
- Fiducial marks define an internal image coordinate system and enable distortion correction.
- Principal point is the photograph's geometric center, crucial for orientation and displacement correction.
- LiDAR is active remote sensing, measuring distance via laser pulse time-of-flight.
- LiDAR generates highly accurate 3D point clouds of terrain and objects.
Answer: Fiducial marks and principal points are fundamental geometric references in aerial photographs, crucial for establishing internal photographic geometry and enabling accurate photogrammetric measurements. They provide a stable coordinate system for distortion correction and spatial referencing. LiDAR remote sensing, an active technology, utilizes laser pulses to measure distances and generate highly precise 3D representations of the Earth's surface. Its application potential spans diverse fields...