interpolation, power....

Discussion created by annse on Dec 14, 2010
Latest reply on Jan 12, 2011 by akhiker
I´m doing an interpolation on soil weight within 10 different areas. I have between 5 and 18 soilsamples in each area and I want a value of totalt soil in each area. I have interpolated with IDW using different powers and number of points included but I still think it is difficult to choose the parameters correct, what should I think about, what is most important? When I put power to 4 the result looks bettert han when I put it as 2( I dont get as much sinks), but how high power can one use? I know that it is usually between 1-3 but how ok is it to have it higher, when is it ok?
Should I use another interpolation method?