Modeling and mapping erosion under the S.I.G. Case of the urban townships of Tsiroanomandidy city and case of the rural townships of Tsiroanomandidy Fihaonana - Patrick, RABE HERITSALAMARIVO; Raymond, RAKOTONDRAZAFY; Chrysostome, RANDRIAMBOAVONJY Jean; herve, RANDRIAMANANJARA Louis; Marie, RAZAFIMBELO Rachel (International Journal of Advance Research and Innovative Ideas In Education, 2019)