# ADAfinder Tool Applied to EGMS Data for the Structural Health Monitoring of Urban Settlements
## 3 Experimental Results
### Elaboration of the ADAfinder Results  
The attribute tables of the PSs included in each ASC or DES ADA are extended by associating the ID number of the building intersecting the PSs themselves. The average \(\mathrm{V_{m,ASC}}\) and \(\mathrm{V_{m,DES}}\) for each building are estimated. In the maps of Figures 6 and 7, the average \(\mathrm{V_{m,ASC}}\) and \(\mathrm{V_{m,DES}}\) are shown coloring the buildings surfaces, respectively, for _Eixample_ and for _Zona Franca_. The buildings characterized by lack of PSs are covered by violet polygons. The number of PSs used to compute the average \(\mathrm{V_{m,ASC}}\) and \(\mathrm{V_{m,DES}}\) for each building is important because the more points there are, the more reliable the measurement can be. For _Eixample_, this number varies between 2 and 82 for ASC and between 1 and 37 for DES. For _Zona Franca_, this number varies between 1 and 476 for ASC and between 1 and 169 for DES. The upper bound is a function of the dimension of the building surface.  
The maps of vertical and E-W components of the mean deformation velocity (\(\mathrm{V_{V}}\) and \(\mathrm{V_{EW}}\)) are respectively shown in Figure 8a,b and in Figure 9a,b for the two case study areas. In these final maps, the union of the buildings characterized by lack of PSs in the original datasets is marked with violet polygons. It is important to remark this information because these buildings could be \"unstable\", but they cannot be investigated using the presented methodology. Further study should be done to estimate their deformation condition.  
The final number of monitored buildings is 140 for _Eixample_ and 75 for _Zona Franca_. The velocity component maps remark that the area of _Eixample_ is stable. In contrast, in the southern part of the _Zona Franca_, there are buildings affected by vertical deformations. In particular, 3 buildings reach vertical downwards average velocities included between 8 and 10 mm/y, another 3 between 6 and 8 mm/y, but the most populated velocity range is between 4 and 6 mm/y, with 20 buildings affected by vertical velocities of this entity.  
A focus on one of the quadrangular blocks of the _Eixample_ is reported in Figure 10a,b for ASC and DES PSs, respectively. Figure 10c shows the consequent map of vertical/E-W components of the mean deformation velocity (in this case, because of the stability of the buildings, the two maps are equal, characterized by green color).  
Figure 6: Maps of buildings in _Eixample_ area with an average value of mean deformation velocity along (**a**) ascending and (**b**) descending orbit. The violet polygons represent buildings with lack of PSs.  
Figure 8: Maps of (**a**) V\({}_{\rm EW}\) and (**b**) V\({}_{\rm V}\) components for the “unstable” buildings in _Eixample_ area. The violet polygons represent buildings with original lack of PSs.  
Figure 7: Maps of buildings in _Zona Franca_ area with an average value of mean deformation velocity along (**a**) ascending and (**b**) descending orbit. The violet polygons represent buildings with lack of PSs.  
Figure 10: Maps of average values of mean deformation velocity along (**a**) ascending and (**b**) descending orbit, and (**c**) map of \(\mathrm{V_{EW}/v}\) components for one of the quadrangular blocks of the _Example_. The labels indicate the number of PSs used to compute the average mean deformation velocities for each specific building.  
Figure 9: Maps of (**a**) \(\mathrm{V_{EW}}\) and (**b**) \(\mathrm{V_{V}}\) components for the “unstable” buildings in _Zona Franca_ area. The violet polygons represent buildings with original lack of PSs.