fotogrammetriamenetelmät

Fotogrammetriamenetelmät comprise a set of techniques used to derive three-dimensional information from two-dimensional photographs. At its core, photogrammetry involves capturing overlapping images of a subject or scene from different vantage points. These images are then processed using specialized software to identify common points or features that appear in multiple photographs. By analyzing the parallax or disparity between these common points in the overlapping images, the software can calculate the precise three-dimensional coordinates of those points in space. This process effectively reconstructs the geometry of the original object or environment.

There are two main categories of photogrammetric methods: terrestrial and aerial. Terrestrial photogrammetry involves taking photographs from the ground, often using handheld cameras or specialized terrestrial scanners. Aerial photogrammetry, on the other hand, utilizes platforms such as airplanes, drones, or satellites to capture images from an elevated perspective. The choice of method depends on the scale and nature of the object or area being surveyed. Applications of photogrammetry are widespread, including surveying and mapping, architectural documentation, cultural heritage preservation, industrial inspection, and even in fields like archaeology and forensic science. The accuracy and detail achievable through photogrammetry have made it an indispensable tool for precise spatial data acquisition.