I am working on a project to answer the following geographic question: How much have slum areas increased in Mumbai, India, since the 1970's (or earliest data).
I have downloaded LandSat imagery and plan to perform a series of raster classifications to map slum areas. I have imagery from 1975 (LandSat 2), 1993 (LandSat 5), and 2014 (LandSat 8).
Is my approach to this question practical given the data I have access too? I feel I can work with my latest data set, but how much accuracy can I classify images from LandSat 2 and 5? I know that the cell size of LandSat 2 is pretty course(60m). I am using ArcGIS software and would like to know how more experienced GIS professionals would approach this?