B. A technique that uses photographs to make measurements and create maps and 3D models
C. A technique that uses satellites to measure land elevations
D. 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.
The International Labour Organization is a United Nations agency whose mandate is to advance social and economic justice through setting international labour standards. Founded in 1919 under the League of Nations, it is the first and oldest specialised agency of the UN.
