The graph of the observed water level and predicted water level is displayed in Figure 8. It shows that the data points with weak spatial dependence are relatively far from the line of 1:1 compared to the case of strong spatial dependence. Therefore, the accuracy of the kriging map using data of strong spatial dependence (August 2019 – February 2020) is more accurate compared to weak spatial dependence (November 2018 – July 2019).