I have daily rainfall data for the year 2000 - 2020 for a rainfall station. How i want to find the suitable value to use in ArcGIS / QGIS to do the interpolation? Only 1 value is used to do the interpolation. Thanks in advance
Please clarify you question a little bit more. With multiple data sets you can do interpolation and forecasting; and with single data set you can do interpolation only such as finding the missing value of a rainfall station or gauge based on its adjacent known values. Please clarify.