Chapter 1 -Introduction 1 More information can be found in Appendix 1 and on the its4land homepage www.its4land.com (last accessed 27.07.2021) Conventional cadastral maps are often based on visual boundaries which are surveyed in the field and aim for highly accurate delineation and adjudication of formal property rights, typically ownership and long term leasehold. Whilst most developed countries already maintain wellestablished cadastres, most countries in the Global South do not have
Unmanned Aerial VehiclesUnmanned aerial vehicles (UAVs) -also known as the gender-neutral term unoccupied aerial vehicle (UAV), remotely piloted aircraft systems (RPAS) or just 'drones' -are remotely controlled and follow semiautonomously or autonomously predefined flightpaths. The term unmanned aerial systems (UAS) can also be found throughout the literature and considers the whole system, which includes the unmanned aircraft and the on-ground command-and-control station (Everaerts, 2009). Within the last decade, UAVs became a genuine gain for scientific as well as commercial applications. Since the price and the size of UAVs significantly dropped over the past years (Barnes and Volkmann, 2015), they stand out as an affordable acquisition tool for mapping and investigations at short time frames.In general, UAV flight missions include both technical and non-technical aspects. As shown in Figure 1.1, the UAV itself, the UAV pilots, and the legal permission to conduct UAV flights are the main requirements for UAV-based mapping. The UAV data acquisition mission follows three phases: flight planning, data acquisition, and data processing. In most cases, most emphasis is put on the UAV flight as the main event. However, it makes up only 20% of the time effort needed for the entire UAV-based field campaign (Nex and Remondino, 2014). Depending on
Research problemUAVs are seen as a widely established technology to gather highresolution imagery for land use or land cover mapping (Colomina and Molina, 2014). Although reported benefits seem to be auspicious, the adoption of UAVs as an innovative tool for cadastral mapping workflows remains remarkably poor. Previous works -which seldom exceed the scope of feasibility studies -mainly refer to data-driven and 2 This chapter is based on: