The roots of photogrammetry can be traced back to military surveillance and reconnaissance during World War I.
Pilots used advances made in photography coupled with manned flight to obtain image based intelligence from behind enemy lines. Without context, the pictures were worthless, however, these photogrammetry pioneers used local landmarks, landscape characteristics and known ground data to identify the orientation of objects of interest in the shots. These methods would change over subsequent decades as new advanced instruments and techniques became available, from stratospheric U2 planes to sophisticated meteorological satellites, and in recent years, contemporary UAV/drone photogrammetry.
Today’s photogrammetric maps captured by drones are created using sophisticated GIS equipment and software capable of producing surveyor-grade measurements of properties, landscapes & infrastructure. These maps are sufficiently precise to give important insight into actual environmental conditions on the ground and when using Real-Time Kinematic (RTK) corrections are capable of centimetre level accuracy.
There are multiple opportunities when using a drone to capture survey quality imaging data. The list below is only the tip of the iceberg in terms of what Photogrammetry solutions are capable.