The science of deriving size and distance measurements from a sequence of remote sensing images is called

The science of deriving size and distance measurements from a sequence of remote sensing images is called

• A. Remote sensing
• B. Photogrammetry
• C. Cartography
• D. Spectrometry

Answer: (B)

Photogrammetry is the science of deriving real-world measurements, such as sizes and distances, from photographs. When a drone captures a sequence of overlapping images, photogrammetry analyzes how the same ground point appears from different viewpoints. By understanding the camera geometry and parallax between images, it can calculate distances, heights, and 3D coordinates, enabling accurate maps and 3D models. This is exactly what’s needed to turn a set of photos into measurable data. Remote sensing is the broader practice of collecting information from distance using sensors. Cartography is the art and science of making maps. Spectrometry focuses on measuring spectral properties of light to identify materials. These terms describe related concepts, but deriving measurements from imagery specifically comes from photogrammetry.

Photogrammetry is the science of deriving real-world measurements, such as sizes and distances, from photographs. When a drone captures a sequence of overlapping images, photogrammetry analyzes how the same ground point appears from different viewpoints. By understanding the camera geometry and parallax between images, it can calculate distances, heights, and 3D coordinates, enabling accurate maps and 3D models. This is exactly what’s needed to turn a set of photos into measurable data.

Remote sensing is the broader practice of collecting information from distance using sensors. Cartography is the art and science of making maps. Spectrometry focuses on measuring spectral properties of light to identify materials. These terms describe related concepts, but deriving measurements from imagery specifically comes from photogrammetry.