DISADVANTAGES OF CONVENTIONAL MAPPING
The calibration of points for a topographic site survey using a tachymeter is time-consuming and tedious. In addition, particularly impassable, larger areas as a whole are difficult to capture by terrestrial means. The result of lengthy surveying by conventional methods often shows deficits in the information density. Alternatives represent recording images from airborne measurement imaging cameras or satellite images. However, satellite images are often not sufficiently up-to-date. Only areas which are below a satellite’s orbit can thus be recorded. Furthermore, the temporal resolution due to the degree of cloudiness is limited, and the creation is generally associated with very high costs.
Mapping with drones: High resolution, lower costs, more efficiency
Photogrammetric evaluations of drone-supported aerial photographs offer a variety of advantages as compared to conventional methods: Photographs for mappings can be created significantly faster and in a personalised manner, the level of detail of the topographic survey is several times higher, and the overall area can be recorded with considerable ease. It is thus possible to respond to the most diverse requirements through the use of drones as carriers of measurement systems. Image flights can thus be produced in almost any low resolution, for example. They are considerably more cost-efficient in comparison with classical methods.