thank you very much , i already downloaded some lansat etm+ , tm, mss for 1970 1990 2000 2006 , different sensors , i dont know if the pre-processing is the same , trying to get a document (step by step) from the pre-processing ,classificaion and for the simulation( planning to use IDRISSI soft). i am a bit familiar with envi and argis
i have one year o get it done ,hope to defend in june 2011 , not easy for the first time working on this