I have created grid cells over Liberia on a shapefile. Then added data from a household survey, and joined the georeferencing data based on spatial location. The trouble is, that only around 100 of 1.300 cells are represented with data, the rest has the value 0.
How can I do an interpolation that fills the missing values in my attribute table? I would prefer an inverse distance weight interpolation in the geostatistical wizard that gives me the predicted values. But the huge amount of zeroes are too biased, and when I change the zeroes to <Null>, they are not included in the interpolation.
What am I doing wrong?