Facade Photogrammetry Services

Photogrammetry reconstructs three-dimensional geometry from overlapping photographs using computer vision algorithms. For facade documentation, we capture hundreds to thousands of photographs from controlled positions at close range (rope access or EWP) and from aerial platforms (drones). The resulting 3D surface model captures not only geometry but also colour, texture, and fine surface detail at resolutions down to 1mm per pixel. This makes it ideal for documenting defects that are visible but too small or too numerous to individually photograph in the traditional manner.

Close-range photogrammetry from rope access produces the highest-quality surface data. Technicians photograph defect areas with calibrated cameras at consistent distances, creating overlap patterns that the processing software uses to reconstruct accurate 3D geometry. The resulting textured mesh shows every crack, stain, spall, and surface irregularity in its exact spatial context. This is particularly valuable for heritage facades where the original fabric must be documented before any intervention.

Aerial photogrammetry from UAV platforms provides efficient coverage of large facade areas, rooftop interfaces, and sections that are difficult to reach even with rope access. Modern survey-grade drones capture oblique and nadir imagery that processes into accurate 3D models and high-resolution orthomosaics (geometrically corrected aerial photographs). These products complement terrestrial LiDAR data and can be used for area calculations, measurement extraction, and change detection.

All photogrammetric outputs are integrated with the broader 3D building model on the Facade Inspect platform. Surface models are aligned to the LiDAR point cloud framework, defects identified in the texture data are linked to the defect register, and the combined dataset provides a complete digital record of facade condition that can be measured, shared, and compared over time.