Surveying - Photogrammetry
Surveys usually form the foundation of every project. Classic images of the situation as-is are derived from Total Station, GNSS and a terrestrial laser scanner. Flights were until recently only made for larger areas, as flight hours in manned aircraft are expensive, and so too the associated equipment. As such, it was only practical to use aerial photography for areas over 5 km² in size. Hand in hand with substantial improvements in digital photography, processing software and affordable computer performance, as well the development of unmanned, remote-controlled aircraft, it is now finally possible to provide flights over small areas, using terrestrial photogrammetry, in a fast, precise and affordable manner! Naturally, there are certain limitations: problems can arise, for example, in areas of dense vegetation or over flat, reflective surfaces. Yet for many areas the advent of drones and digital cameras has provided the first affordable solution to capturing the desired data.