Photogrammetry is the science of making measurements from photographs.
The output of photogrammetry is typically a map, drawing or a 3d model of some real-world object or scene. Many of the maps we use today are created with photogrammetry and photographs taken from aircraft.
In Aerial Photogrammetry the camera is mounted in an aircraft and is usually pointed vertically towards the ground. Multiple overlapping photos of the ground are taken as the aircraft flies along a flight path. These photos are referenced to ground control surveys and processed in a stereo-plotter (an instrument that lets an operator see two photos at once in a stereo view).
Through the use photogrammetry there are many derivative products that can be extracted from the aerial imagery. These products include:
- DEM / DTM / DSM (surface models)
- Orthophoto’s (geospatially corrected aerial images)
- 3D Building Models
- Contour Maps
- Planemetric features such as road edges and heights, signs, building footprints, etc.
- 3D vegetation modelling
- Volumetric Surveys
The use of photogrammetry enhances the operations of a broad range of industries, all of which benefit from increased efficiency and reduced costs. S0me of these industries are:
- Mining and Exploration
- Engineering and Infrastructure
- Environmental and Forestry
- Electric Utilities
- Telecommunications and Broadcasting
As mentioned earlier photogrammetry is the base to many useful applications to a multitude of industry applications. More enhanced solutions can be derived through other services such as remote sensing. Join us next week as we dig deeper into the the many useful solution aerial survey technologies has to offer your industry.