Thank you Alex Urbach. This is the first time that I have been using this software. I used ENVI for all my data analysis. I am now using IDRISI for change prediction only. I would like to know where I start so as to get Transition suitability image collection. I just started on "Exercise 3-6:Using Markov Cellular Automata for Landuse Change Modeling" I got stuck where it says input TRANSSUIT