UltraMap’s enhanced classification boosts photogrammetric DTMs

With the release of UltraMap 6.6, Vexcel Imaging has introduced significant improvements to the generation of digital terrain models (DTMs) within its aerial photogrammetry workflow. The update enhances accuracy, usability and consistency in the Ortho Pipeline module, reinforcing UltraMap’s utility in large-scale terrain mapping.

A key advancement in version 6.6 is the improved classification of ground surfaces in complex environments. Enhanced machine learning algorithms now more confidently remove non-ground features – including buildings, vegetation, infrastructure and temporary obstructions – while preserving water bodies with greater reliability. These refinements lead to cleaner, more accurate ground models that integrate smoothly into downstream workflows.

Topographic detail has also improved, with mountain ridges, valleys and coastal lines now preserved with greater fidelity. The software’s expanded training on diverse landscapes contributes to better performance, even in densely vegetated areas.

Sharper infrastructure and improved visual consistency

Infrastructure elements such as roads, bridges and embankments are rendered more clearly in the DTM. Users can choose whether to include bridges depending on project needs, and a new feature allows automatic selection of tiles containing bridges for faster quality control and reprocessing.

Visual representation has been refined as well. Adjustments to noise levels create a more natural-looking terrain surface, reduce noticeable transitions between interpolated regions, and help users validate results more efficiently.

UltraMap DTMs, long used as a foundation for orthophoto generation, are increasingly positioned as standalone products. The update supports broader use cases while offering a cost-effective alternative to Lidar – particularly in regions where deploying Lidar is impractical or cost-prohibitive.

Expanding use cases for photogrammetric terrain models

With built-in editing tools like the Heightfield Editor, users can easily make local adjustments to the DSM and see immediate updates in the DTM. This flexibility supports applications such as hydrological modelling, contour extraction and integration into 3D building modelling tools like RhinoTerrain. Enhanced ground detection during leaf-off seasons further strengthens output reliability in wooded areas.

Photogrammetric terrain modelling continues to evolve, with UltraMap 6.6 highlighting how smarter classification and streamlined workflows can deliver terrain data that is both accurate and scalable. By aligning DTM generation more closely with high-resolution aerial imagery, this Vexcel Imaging update offers a practical solution for modern geospatial applications – without the need for Lidar in every case.