What is photogrammetry in the context of surveying?

سروے کے تناظر میں فوٹوگرامیٹری کیا ہے؟

A technique that uses satellites to measure land elevations

A technique that uses photographs to make measurements and create maps and 3D models

A process of manually drawing topographic maps

A GPS-based method for calculating distances

Explanation

Photogrammetry involves analyzing photographs—often aerial or drone images—to extract accurate measurements, generate maps, and create 3D models of terrains and structures.