## 3 Results and Discussion
### Variation in Overlap and Height
At 10 m, the optimal overlap is 75%, because with this overlap and height the error is the lowest, specifically 2.6%; this error is 0.6% lower compared to an overlap of 80%. Simultaneously, the error is reduced by more than 39% compared to the overlaps of 85 and 90%. At 15 m, the least error was obtained (30.2%) with an overlap of 80%, the other overlaps (75, 85 and 90%) has an error difference that exceeds 22% compared to the overlap of 80%. At 20 and 80% overlap, a 57% error was obtained, which is the lowest and is 4% lower compared to the 75% overlap; even better, the error is reduced by more than 15.8% compared to 85 and 90% overlaps. At 25 m the least error was obtained (70.2%) with an overlap of 75%, the other overlaps (80, 85 and 90%) have an error difference that exceeds 14.7%, compared to the overlap of 75%. At 30 m, the least error was obtained (79.6%) with an overlap of 75%, the other overlaps (80, 85 and 90%) have an error difference greater than 16.1% compared to the overlap of 75%. At 40 m, the error of all overlaps exceeds 95%, so the analysis is no longer representative. As mentioned in the previous analysis, the potholes analyzed would not have the same conditions as in practice (width \(>>\) depth), so the analysis remains conservative. Additionally, when looking at the same figure, the error of average severity potholes is reduced compared to low severity bumps, because their dimensions are larger. From Figure 8c, an optimal overlap is observed for the heights of 8, 15, 20, 25 and 40 m, while, for the heights of 2, 5, 10 and 30 m its peak is not apparent at first sight. At 2 m, the least error was obtained (2.1%) with an overlap of 75%, the other overlaps (80, 85 and 90%) have an error difference greater than 1.5% compared to the overlap of 85%. For 5 m, the least error was obtained (0.7%) with an overlap of 85%, which has 0.7% less error compared to a 90% overlap. At 8 m, the least error (6.2%) was obtained with an overlap of 80%, which has 3.7% less error compared to an overlap of 90%. Simultaneously, the error is reduced by more than 5.9% compared to overlaps of 85 and 90%. At 10 m, the least error (1.4%) is for overlaps of 75 and 80%, the other overlaps (85 and 90%) have an error difference greater than 10.8% compared to overlaps of 75 and Figure 9 shows the values and behavior of the width measurement error when varying height and overlap in vertical photo acquisition flights (90-degree camera angle) for different severity of potholes (low severity in Figure 9a, middle severity in Figure 9b, high severity in Figure 9c). Figure 9: Cont. According to Figure 9a and compared to the figure above, it is observed that the width measurement has a lower error than the bump depth measurement. At 2 m, the least error was obtained (3.6%) with an 80% overlap, which has 0.2% less error compared to the 85% overlap. At 5 m, the minimum error value (0.9%) was achieved with an overlap of 80%, which has between 1.4 and 2.3% less error compared to the other overlaps (75, 85 and 90%). For 8 m and an overlap of 80%, an error of 1.5% was found, which is the lowest for this height, comparing this error with respect to overlaps of 75 and 85% there is a difference between 2.3 and 3.5% less error respectively, even more, the error is reduced by 5.6% compared to an overlap of 90%. For 10 m, the least error was obtained (2.7%) with an overlap of 80%, which has 2.6% less error compared to an overlap of 75%, moreover, the error is reduced by more than 5.9% compared to overlaps of 85 and 90%. At 15 m, the least error (6.7%) it was obtained with an overlap of 80%, which has 5.7% less error compared to Z an overlap of 75%. Simultaneously, the error is reduced by more than 13.6% compared to overlaps of 85 and 90%. At 20 m, the variability of the error decreases compared to that obtained at 15 m. Additionally, for this height, the minimal error is obtained (16.2%) with an overlap of 80%, the other overlaps (75, 85 and 90%) have an error difference greater than 13.8% compared to the overlap of 80%.