Characterizing territory according to its relief using ArcGIS Desktop?

Question

I want to characterize the territory according to its relief with ArcGis 10. I'm trying to define a wide territory by its relief, but I would like to do it in an automatic or semiautomatic form with the GIS. I read on some webs that I can do it with the topographic position index, but I don't know how. Can somebody explain or give some references to learn how I can do this analysis?

Answer 1

TPI is complex and not for a GIS newbie. That said the toolbox to perform TPI is available at http://hydrology.usu.edu/taudem/taudem5/index.html