The most common use for photogrammetry is creating maps out of aerial photos. It is cost-effective and accurate, allowing planning entities like architects, local governments and construction workers to make clear, informed decisions about their projects without spending months scouring the landscape. It is also very detailed and can provide an exceptional level of information about an area.
- Aerial Photogrammetry
- Terrestrial and Close-range Photogrammetry
2.0 3D Laser Scanning (Laser Radar)
The acronyms RADAR stands for RAdio Detection And Ranging. This are devices that use infra-red-light projection to construct metric data from objects they are scanning. Laser scanners gather plane data using a laser beam pointed at the surface and then convert that data into a point cloud. RADAR is a cone shaped signal fanning out from the source. It uses longer microwave frequencies which have lower resolution but the ability to collect signals with reduced impact from environmental obstructions
This is the use of UAVs to survey an area of land. A surveyor/ drone Operator flies the drone over an area of land, capturing pictures. The end result is then processed with help of computer software to produce a site model. The images are stitched together
Photogrammetry, digital orthophotography, orthophoto & orthoimage
Photogrammetry is a sophisticated process by which information is extracted from photographs to create accurate three-dimensional maps and models. Using ultra-high-resolution aerial photographs, this practice combines UAV-mounted overhead sensors with powerful GIS mapping systems to create dynamic, measurable documents for a number of real-world situations and uses. Digital photogrammetry operates on images of objects captured from different locations and angles using a standard digital camera, and having the computer detect overlapping patterns to build up a 3D reconstruction of the photographed model.