Eurosense has achieved outstanding results in creating high-quality watertight building models of Old Town Graz, Austria, at Level of Detail (LOD) 1 and 2, using Vexcel”s state-of-the-art UltraCam large-format aerial systems and UltraMap photogrammetric processing software in conjunction with RhinoTerrain and DAT/EM software solutions.
The Vexcel and RhinoTerrain products have proven to be a perfect match for Eurosense, as they complement each other seamlessly. In fact, Eurosense has been utilizing Vexcel imagery with RhinoTerrain for several years to produce 3D city models, and the workflow has become a familiar and trusted production tool within the company. As Eurosense engineers explain, “We have found that the combination and compatibility of these cutting-edge technologies are a winning formula for us.”
The particular project scope included images from Vexcel’s hometown, Graz, captured with an UltraCam Osprey 4.1 at 80% forward and 60% sideward overlap and 5 cm Ground Sampling Distance. Image post-processing and Aerial Triangulation of both nadir and oblique imagery was done within UltraMap. The resulting Exterior Orientations and TIFFs were imported into RhinoCapture for digitizing vectors in a 3D stereographic environment provided by DAT/EM’s Summit Evolution. Following, RhinoCity automatically produced exact LOD 2 building models by combining geometry and semantic information. In the final step, the 3D model was automatically textured with nadir and oblique imagery. Mapping and results are produced according to CityGML standards.
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