The user may have access to a gridded precipitation product and enter that into the database using the appropriate tools. For this example, there is only point gaged data. Point precipitation is interpolated into a grid set using "gageInterp", which uses latitude/longitude to compute grids. A script included with the example basin, runs gageInterp. Refer to the gageInterp documentation for more information on gageInterp and the script. An example gageInterp input file (Figure 10.9).