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IDW interpolation of point rain data

Question asked by ssarch on Jun 6, 2019
Latest reply on Jun 6, 2019 by Dan_Patterson

I have point-shapefile with meteorological stations counting daily rain of a specific precipitation event. I tried to interpolate the rain data applying the Inverse Distance Weighting, but I noticed that the output interpolated area resulted having as boundaries the locations of the stations. Is there any way to raise up the applicable interpolated area in order to have as boundaries the whole study area through IDW? I attach you the relevant photo. Thanks in advance.