Photogrammetry

Photogrammetry is the science of taking multiple photographs of an object or surface to generate a 3-dimensional stereo image. This process has been utilised together with imagery sourced from aerial photography since the 1850s. The big change that has occurred in recent times is the ability to capture high quality aerial imagery from an Unmanned Aerial Vehicle (UAV), commonly known as a drone. This capability, combined with intelligent software and powerful computing, allows PDA Surveyors to provide comprehensive aerial mapping surveys in-house.

We can also provide terrestrial photogrammetry services for incredibly detailed surveys of objects such as building facades, historic walls, and other objects such as monuments and rock carvings.

Applications

Deliverables

Photogrammetry allows us to provide a rectified orthographic image that has both relief and lens distortions removed.  The orthographic image is accurate and suitable to obtain accurate measurements.  The resultant image is incredibly detailed and aesthetically pleasing and provides a useful tool when combined as an underlay with a conventional detail survey.

When extracting elevation data, our photogrammetric software is capable of generating a Point Cloud in true colour.  The Point Cloud can be used on its own but is typically then applied to further generate surface models and contours.

If you are interested in any of our photogrammetry services and whether they might be suitable for your project, contact your nearest PDA Surveyors office to discuss the options available.