## 3 Results
### A-DInSAR at Regional Scale  
The LOS mean deformation velocity maps (mm year\({}^{-1}\)) obtained by the PSIG chain and GEP service are presented in Figure 4 and are summarized in Table 2. There was a great difference in the total number of PS detected between the PSIG and GEP maps. A total of 151,722 PS (811.3 PS km\({}^{-2}\)) were obtained with the PSIG chain. With the GEP service, a total of 16,654 points were measured (89.1 PS km\({}^{-2}\)). The LOS velocity ranges estimated were similar to each other. In PSIG, the minimum and maximum LOS velocities were \(-\)17.1 and 37.4 mm year\({}^{-1}\) (mean value is 0.0 \(\pm\) 1.1 mm year\({}^{-1}\)). For GEP service, the minimum and maximum LOS velocities were \(-\)23.0 and 38.3 mm year\({}^{-1}\) (mean value is 0.0 \(\pm\) 2.6 mm year\({}^{-1}\)). \begin{table}
\begin{tabular}{c c c} \hline \hline
**STUDY AREA** & **PSIG Software** & **GEP Service** \\ \hline Number of points (PS) & 151,722 & 16,654 \\ Density of points (PS km\({}^{-2}\)) & 811.3 & 89.1 \\ LOS velocity (mm year\({}^{-1}\)) & & \\ Mean & 0.0 & 0.0 \\ Maximum & 37.4 & 38.3 \\ Minimum & \(-\)17.1 & \(-\)23.0 \\ Standard deviation & 1.1 & 2.6 \\ Accumulated LOS deformation (mm) & & \\ Mean & 0.1 & 1.1 \\ Maximum & 78.8 & 77.0 \\ Minimum & \(-\)68.5 & \(-\)48.8 \\ Standard deviation & 3.6 & 5.1 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Main characteristics of PSIG and GEP processing and A-DInSAR dataset: Statistics of LOS mean deformation velocity rates (mm year\({}^{-1}\)) and accumulated LOS deformation (mm). Figure 4: (**a**) LOS mean deformation velocity map in mm year\({}^{-1}\) obtained by PSIG software; (**b**) LOS mean deformation velocity map in mm year\({}^{-1}\) obtained by GEP service; the red squares are the selected deformation areas for local analysis. OrtoPNOA 2017 CC-BY 4.0 scene.es. In order to compare the ground movement rates, we have considered as active PS those above \(\pm\) 2.5 mm year\({}^{-1}\). This threshold was selected according to the standard deviation of GEP results (\(\sigma\) =\(\pm\)2.6). In the case of PSIG, there were 146,855 PS (96.79%) with LOS mean velocity between -2.5 and 2.5 mm year\({}^{-1}\). However, in the GEP results the total number of PS between \(-\)2.5 and 2.5 mm year\({}^{-1}\) was 16,654 (74.53%). With respect to the accumulated displacement, PSIG detected between \(-\)68.5 and 78.8 mm (mean value 0.1 \(\pm\) 3.6 mm). With GEP, we have measured between \(-\)48.8 and 77.0 mm (mean value 1.1 \(\pm\) 5.1 mm). Figure 4 makes it possible to distinguish several differences between the results of the approaches. Firstly, GEP presents a wider distribution of dispersed active PS across the whole area, without delimiting deformation areas. Nonetheless, the active PS of PSIG appeared to define ground movement areas. On the other hand, there were some sectors where PSIG had barely detected PS whereas GEP had detected movements: the northernmost zone of Penas Cape and the Podes sector, for example. In the first case, the LOS velocities detected were between \(-\)8.6 and 15.2 mm year\({}^{-1}\). The minimum and maximum accumulated displacements were \(-\)17.2 and 30.1 mm. In the Podes peninsula, the PS present LOS velocities from \(-\)6.8 to 12.9 mm year\({}^{-1}\). Figure 4a shows the LOS mean deformation velocity map (mm year\({}^{-1}\)) obtained by PSIG. LOS velocity PS \(<\)\(-\)10.0 mm year\({}^{-1}\) (15 PS, 0.01%) were detected, as isolated PS, in Aviles and Gijon cities and Musel Port infrastructures. They cannot be considered as good PS for interpretation. LOS velocity rates between \(-\)10.0 and \(-\)5.0 mm year\({}^{-1}\) (184 PS, 0.12%) and from \(-\)5.0 to \(-\)2.5 mm year\({}^{-1}\) (2049 PS, 1.35%) appear grouped in some areas with significant deformations (Figure 5a,b). The LOS velocity rate of 2.5-5.0 mm year\({}^{-1}\) (2426 PS, 1.60%) are the most difficult to analyze. They can be observed across the study area as grouped and isolated PS. Moreover, they appear on some cliffs whose orientation is predominantly northward.