Stereophotogrammetrischer

Stereophotogrammetrischer is a German term used to describe methods, systems, or results of stereophotogrammetry—a technique for obtaining three-dimensional measurements from photographs taken from slightly different viewpoints.

The fundamental principle is triangulation through parallax: corresponding points identified in stereo image pairs yield 3D coordinates when the relative orientation and internal camera parameters are known. This enables accurate spatial reconstruction of objects, surfaces, or terrain.

Typical workflows include image acquisition with calibrated cameras or camera rigs, feature matching or automated correspondence, and geometric optimization (bundle adjustment) to produce precise point clouds, dense models, or maps. Calibration, control data, and baseline measurements are critical for achieving high accuracy.

Applications span topographic mapping, urban and architectural modeling, archaeology, forestry, civil engineering, and robotics. Stereophotogrammetric techniques are employed in both aerial (drone or aircraft-based) and terrestrial (handheld or vehicle-mounted) contexts, often integrated with Geographic Information Systems and other remote sensing data.

The term reflects a long history in photogrammetry, dating to the early development of stereo photography and the creation of 3D models from image pairs. Today, stereophotogrammetric approaches continue to evolve with digital imaging, advanced image analysis, and automated workflow software.