## 7 Conclusions  
In this study, the aim was to indirectly estimate V\({}_{\rm s}\) by establishing a relationship between the number of SPT-N blow counts and shear wave velocity (V\({}_{\rm s}\)) data obtained as a result of microzonation studies carried out in the Canakkale residential area located in northwest Turkey. The results obtained from this study and the regression analyses can be summarized as follows:  
1. A simple regression equation was produced between the SPT-N and shear wave velocity (V\({}_{\rm s}\)) data for sandy soils in the Canakkale residential area.
2. The regression equation developed in this study was similar to some previous studies and provided a good estimation performance.
3. Comparing the equations produced using the SPT-N data and energy-corrected SPT-N(N\({}_{\rm 60}\)) data with other previous studies, the equation produced with the SPT-N showed a better estimation performance for V\({}_{\rm s}\).
4. The empirical equation produced in this study will be useful in estimating the shear wave velocity (V\({}_{\rm s}\)) and the shear modulus required for practical dynamic analysis in cases where seismic tests cannot be performed, or are limited in number.
5. The data were analyzed via nonlinear regression analysis, using a power model. Additionally, the amount of deviation from accuracy was determined using error criteria. The correlation coefficient (r) and MAPE values for the power model showed a good agreement between the uncorrected Vs-SPT-N and corrected Vs-SPT-N(N\({}_{\rm 60}\)) correlations.
6. The predictive ability of the proposed equation between SPT-N and V\({}_{\rm s}\) can be further improved through the use of data obtained via in-hole seismic methods, as well as through an increase in the number of seismic refraction profiles in future studies.
7. The differences between the equations proposed in previous studies and the equations proposed in this study are due to the soil properties of the investigated area, as well as the depth, groundwater level, number of data processed, and seismic measurement techniques used.
8. This study was carried out on sandy soils in the Canakkale residential area. Researchers who hope to benefit from this study can use the suggested equations if they are working with similar soil properties, depths, SPT-N blow counts, and V\({}_{\rm s}\) values. The equations will allow them to approximate the V\({}_{\rm s}\) values in their field of study.
9. The careful use of the produced equation, and checking with the shear wave velocity values measured at certain locations will increase the accuracy of dynamic analyses.  
This research received no external funding.  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** The data used in this study are microzonation project data financed by Canakkale Municipality. For this reason, data cannot be shared without the permission of Canakkale Municipality. According to the agreement made with Canakkale Municipality, the authors of the microzonation report have the right to use the data.  
**Acknowledgments:** The author would like to express their gratitude to the municipality of Canakkale for information, the microzonation report, and the logs for the geotechnical boreholes.  
**Conflicts of Interest:** The author declares no conflict of interest.  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & & \multicolumn{3}{c}{**Uncorrected V\({}_{\rm s}\)–SPT-N**} & \multicolumn{6}{c}{**Corrected V\({}_{\rm s}\)–SPT-N(N\({}_{\rm 60}\))**} \\ \hline
**Model** & **r** & **MSE** & **RMSE** & **MAPE** & **MAE** & **r** & **MSE** & **RMSE** & **MAPE** & **MAE** \\ \hline Power & 0.67 & 1516 & 39 & 16 & 32 & 0.55 & 2288 & 48 & 20 & 39 \\ \hline \hline \end{tabular}
\end{table}
Table 4: Evaluation of the uncorrected V\({}_{\rm S}\)–SPT-N and corrected V\({}_{\rm S}\)–SPT-N(N\({}_{\rm 60}\)) correlations with the error criteria for the power model.