NCIDQ IDFX Practice Exam

Which method utilizes two overlapping photos to create a 3D drawing?

1. Laser scanning

2. Stereophotogrammetry

3. Convergent photogrammetry

4. Orthophotography

The correct answer is: Stereophotogrammetry

The method that utilizes two overlapping photos to create a 3D drawing is stereophotogrammetry. This technique relies on capturing images from slightly different angles. By analyzing those images, software can calculate depth information and reconstruct a three-dimensional representation of the objects being photographed. This process takes advantage of the way our own visual perception works with two eyes; by comparing the two images, depth perception is achieved, leading to an accurate 3D model. Stereophotogrammetry is crucial in fields like architecture, landscape design, and other areas where spatial accuracy is vital. It allows designers to create detailed models that can inform projects and decisions. The other methods mentioned serve different purposes: laser scanning captures objects in three dimensions using laser beams; convergent photogrammetry refers to capturing images from multiple angles to create a model but not necessarily with just two images; and orthophotography involves creating accurate, geometrically corrected aerial photographs and does not specifically focus on the 3D modeling aspect of overlapping photos.