8.14.2. Advantages in Civil Engineering

• High spatial and temporal resolution.

In civil engineering, one major advantage of using UAV-based photogrammetry is its ability to provide high spatial and temporal resolution. This means that the data collected can accurately represent small features on the ground and can be captured frequently over time. High spatial resolution allows engineers and planners to see fine details in the terrain and structures, which is critical for tasks such as land surveying and construction planning.

Imagine a photographer using a high-resolution camera to capture images of a busy city. Each building and road can be seen in fine detail. If this photographer returns every few weeks to take more pictures, they can effectively track changes in the city, like new construction or road modifications, similar to how UAVs capture ongoing changes in civil engineering projects.

• Easy access to difficult or hazardous areas (steep slopes, construction sites).

UAVs, or drones, are especially useful in accessing areas that are dangerous or challenging for humans to reach, such as steep slopes or active construction sites. Drones can easily fly over these locations to gather data without putting personnel at risk. This capability is particularly advantageous in civil engineering, where safety is paramount and certain areas cannot be safely traversed on foot or by vehicle.

Think of a firefighter needing to observe a wildfire. Instead of risking a human’s life, they use a drone to get a bird's-eye view of the situation. Similarly, civil engineers use drones to gather information about sites that might be hazardous, such as unstable cliffs or ongoing construction zones, ensuring they can gather data without risking lives.

• Real-time monitoring of project progress.

Another important advantage of UAV-based photogrammetry in civil engineering is the ability to monitor project progress in real-time. Engineers and project stakeholders can receive immediate updates on the status of construction or other civil engineering projects. This allows for faster decision-making and adjustments to be made if issues arise during the construction process.

Consider conducting a live check on a building site, equivalent to how a chef tastes a dish while still cooking to ensure everything is on track. Using UAVs gives civil engineers a similar advantage, as they can continuously monitor construction to ensure it meets design specifications and schedules.

--