Hi,
Thank you for your answer. Actually I've already done all that (fractal, lineaments, and poisson nearest neighbors). I'm trying to find out if tectonic environement act on the distribution of volcanoes in volcanic fields. I just started to play with the results of the PNN analysis, and so far it looks quite random. Except when I plot for each field (25 of them), the mean distance between the NN =f(density). I can fit in power equation in the form of y=ax^-b. I'm not familiar with the statistical interpretation of such trend.. that's why i was writing here to get some advice.
cheers