# Review of Photogrammetric and Lidar Applications of UAV
## 6 Discussion
### Discussion on Applications of UAVs
#### 6.2.5 Non-Surveying Applications  
The advantage of using UAV technology to make photographs [178; 179; 180], video recordings [181; 182], or cinematography [183; 184] consists in the possibility of exploring and capturing territories and areas with high flexibility and range while producing long continuous shots at a reasonable cost. Imaging ranges are from a few centimeters to more than 100 m. [PERSON] et al. in [178] used a Maxi-Joker 3 DD minicopter with a 12.3 megapixel Nikon D5000 camera to create continuous, high-resolution digital terrain models (DTM) of river channels and their floodplains. The authors of [179] used a DJI Phantom 3 Advanced UAV with a SONY EXMOR 1/23\" sensor to map tree heights and tree canopies. [PERSON] et al. [180] created 3D models of buildings based on images acquired by a QingTing-5S quadcopter. The work [182] produced a video preview of a peatland east of Ottawa, ON, Canada, using a Canon PowerShot G11 camera mounted on a Hirobo SDX Radio Control helicopter. For the purpose of taking photos and video recordings, the best option is to use UAV photogrammetry. This method meets all requirements related to the detail and quality of the display of the Earth's surface and various objects and phenomena on it. UAV technologies are now being used in disaster management, rescue operations, and public safety surveillance. Using UAVs, large-scale operations can also be safely carried out with higher efficiency. Rescue forces can avoid danger and save a lot of time and costs since UAVs offer real-time imagery of critical locations and, by thermal detection, reveal movement even in dense vegetation [185]. The authors used a High One Drone UAV quadcopter with The Flir Vue Pro 336 camera. UAV technology can speed up decision-making and refine the disaster site's localization. The issue of the use of UAVs in rescue operations is also addressed by [PERSON] et al. [186], [PERSON] et al. [187], and [PERSON] et al. [188]. For search-and-rescue purposes, they used the [186] X-UAV Talon 4, on which a GoPro HERO camera was installed. The GoPro HERO 4 camera was set to video mode with a resolution of 1920 \(\times\) 1080 pixels. As a result, 2200 photographs were segmented, and an ortho-mosaic model and point cloud were produced. [PERSON] et al. [187] discussed the applications of UAVs in search-and-rescue operations in an underground mine. Their study used a DJI Mavic Mini UAV, which was manually controlled and equipped with a microphone to detect humans. I addition, in [188], the authors used a six-rotor Rolfer UAV with a 1920 \(\times\) 1080 HD GoPro camera to detect humans. For fully autonomous navigation of the UAV and automatic detection of humans in danger, the embedded graphics processing unit platform Nvidia Jetson TX1 was used. The authors of [189] used the Talon and Liu X-UAV platform for search-and-rescue purposes. The authors of [190] addressed emergency recognition in the wilderness using the UAV with a Parrot Sequoiat+ multispectral camera in Bindorbagy, Hungary. [PERSON] et al. [191] used UAVs in maritime search-and-rescue operations. In the field of search and rescue, we recommend the use of lidar technology in areas with dense vegetation or in the wilderness. However, in open space, a better method is UAV photogrammetry, which, using a camera or microphone, can detect swimmers in open water and can be effective in emergency search-and-rescue operations. Currently, UAV technology is also used by military units. The authors of [192] used UAVs for the surveillance of geographic regions and to monitor them for security reasons. UAVs are used for strategic and tactical needs [193; 194; 195], simulations [196], surveys [197], and espionage, without the military risking any human lives. UAVs are used in military conflicts to transport and drop bombs and missiles. So-called flying munitions UAVs (also known as kamikaze UAVs), which serve as weapons, are also increasingly frequently used.