## 3 Materials and Methods
### Measurement by the TLS and MLS Methods
\begin{table}
\begin{tabular}{c c} \hline \hline
**Used Equipment** & **Device Settings and Measurement Method** \\ \hline \hline
**GNSS method** \\ \hline \hline  & Connection check between the GNSS antenna and the controller, \\  & Connection to RTK corrections provided by the network, \\  & Communication with 20-25 available satellites \\  & (GPS, Glonass, BeiDou, Galileo), \\  & Selection of the rapid static RTK measurement method. \\ \hline \hline  & **TLS method** \\ \hline \hline  & Medium point density, \\  & HDR image capture enabled, \\  & Double scanning function disabled, \\  & VIS technology enabled, \\  & Correct placement of the scanner across the entire scanned area, \\  & Direct visibility to all GCPs. \\ \hline \hline  & **MLS method** \\ \hline \hline  & Calibration of the IMU, GNSS, and sensors, \\  & Synchronization check, \\  & Selection of the scanning mode, \\  & Determination of the carrier speed during scanning. \\ \hline  & Static positioning at the starting point, \\  & Maintaining a sufficient distance from the device during \\  & calibration, \\  & Calibration of the IMU, GNSS, and sensors, \\  & Check of the synchronization and connection, \\  & Selection of the recommended speed during scanning. \\ \hline \hline iPhone 13 Pro with Emlid & Placement of the devices on a specially designed mount, \\  & scanning kit and GNSS \\  & Check of the RTK correction connection at the GNSS antenna, \\  & antenna Reach RX \\  & Synchronization and accuracy check. \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Device settings, surveying parameters, and remarks during the data collection. Figure 4: Distribution of positions for the TLS survey. For the first MLS survey approach, the Lidaretto mobile laser scanning device was used (Figure 5b). Due to its compact size and weight of only about 1.5 kg, it can be used on various mobile platforms, such as a UAV, car, boat, or even carried on the back of the surveyor or placed on a tripod. The technical parameters of the Lidaretto device are listed in Table 3. In our study, the device was first mounted on the roof of a car (Figure 5b). Before the actual scanning, a one-minute calibration of the device and connection to the RTK module took place. Scanning with the scanner on the roof of the car in our study area lasted approximately 15 min. Subsequently, the Lidaretto was carried on the surveyor's back using a backpack, and the study area was traversed on an electric scooter. The trajectory of the measurement is shown in Figure 6. In total, the MLS process using the Lidaretto took around 40 min. The input parameters for the data collection using the MLS method with the Lidaretto are listed in Table 4.  
The MLS method was also carried out using the mobile scanner Stonex X120 GO (Figure 5c). All technical parameters of this mobile laser scanner are listed in Table 3, and the input parameters for the data collection are described in Table 4. This mobile scanner is equipped with an RTK module, which includes an external antenna used during scanning. Before scanning, it is necessary to calibrate the scanner through the GOapp application, which takes 60 s. The scanner was placed on a stable surface so that there were no moving objects in front of it. The actual scanning was performed using the GOapp application, and the scanner was held in the surveyor's hands while walking through the study area. The measurement trajectory is shown in Figure 6. During scanning, 5 GCPs were targeted by placing the scanner on the desired point. The resulting point cloud from our study area was obtained during three separate scans that together took approximately 1 h. The duration of one scan or loop should be up to 20 min. Three scans were performed for our study. During the first scan, which lasted 17 min, 3 GCPs and 3 CPs were scanned. During the second scan, lasting 17 min, 1 GCP and 3 CPs were scanned, and the third scan completed the scanning of our study area. The third scan lasted 7 min, during which 1 GCP and 2 CPs were scanned.