Case Study: The University of Stuttgart's Institute for Photogrammetry (IFP) achieves sub‑pixel absolute accuracy and high productivity with VisionMap's A3 Digital Mapping System

VisionMap A3 Digital Mapping System Tested by IFP

VisionMap’s A3 Digital Mapping System was evaluated by the University of Stuttgart’s Institute for Photogrammetry (IFP) at the Vaihingen/Enz test site. The challenge was to process a 7.5 × 4.7 km block flown at ~1,972 m with 6 cm GSD and only ten geodetically accurate ground control points (the remaining ~190 GCPs had 1 m accuracy), testing whether the A3 could meet IFP’s stringent photogrammetric accuracy standards.

Using its sweep-frame camera and automated workflow, the A3 processed the block with configurations of 5–8 strips and 5–10 GCPs, delivering RMS horizontal errors of ~0.015–0.023 m and vertical errors of ~0.030–0.052 m—well under one pixel. IFP concluded the system produced “very satisfactory” empirical accuracy, highlighting the A3’s high geometrical accuracy, productivity, and suitability for large-scale mapping projects.

The University of Stuttgart's for Photogrammetry (IFP)