AccuCities 3D models of as-built environments are an industry standard for planning studies and analysis. Manually captured from the latest aerial survey, AccuCities 3D Models can be captured for a site anywhere in the UK with 15 cm accuracy.
“Photogrammetry is the science of making measurements from photographs. It is a photography with a purpose – to accurately measure from it.” says Sandor Petroczi, AccuCities Director. “We use stereo photogrammetry using latest high-resolution aerial imagery to capture our 3D Models. The aerial imagery collection is done using fixed-wing aircraft. As the aerial mapping plane flies over a city area, it takes series of photographs which overlap by 60%. With each photograph its GPS position, height, tilt, pitch and roll are recorded. Using this data + camera calibration data (to eliminate lens distortion effects), the imagery is triangulated to its correct real-world coordinates. In areas where two images overlap, we project one image into one eye, the second image into another eye and and this way we are able to capture the Z mapping coordinate. Using this technique we manually capture every point in the z map.”
Georeferenced CAD models in DGW format overlay OS planning maps and can be used for Daylight, Sunlight & BRE, Overshadowing & Solar Glare, EIA Chapters, Envelope studies, Rights of Light, Cutback & profit share, Feasibility Studies, Verified Views and many other planning purposes. More Customer Case Studies.