Orthorectification

Part of speech: noun

Definitions

1. The process of adjusting aerial or satellite photos to remove distortions caused by terrain and sensor angle, producing maps with accurate geometric properties
2. Correcting images captured from above to fix scale and perspective errors, enabling measurements and overlay with maps
3. Transforming remote sensing imagery to compensate for topographic and sensor-related distortions, ensuring the image aligns properly with Earth's surface features

Etymology: Orthorectification is a technical coinage built from two parts: "ortho-", from Greek "orthos" meaning "straight" or "correct", and "rectification", from Latin "rectificare", meaning "to make straight or right." Put together, the term describes making an image geometrically correct, so that distances and angles on it match the real ground. The "ortho-" prefix here carries the sense of "right" or "true," the same idea found in words like "orthodox" (right opinion) and "orthogonal" (right angles). "Rectification" itself comes from the Latin "rectus," meaning "straight," which also gave English "rectangle" and "correct." Combined, the word reads roughly as "making right" in the sense of making an image geometrically true. Its formation is plain: a Greek prefix joined to a Latin-derived noun, a pattern common in modern technical vocabulary. The word belongs to the vocabulary of photogrammetry and remote sensing, where aerial and satellite photographs are adjusted to remove the distortions caused by camera tilt, terrain relief and lens geometry.