Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2009.3894.3899EslamiA. RoshaniM. 122009921This study has been emphasized on ecotourism theory in Southern Caspian Sea, 25 watershed (shemrood), Guilan Province. Firstly, for ecotourism development, the study region divided to 3 zones: plain, forest and rangeland. Then using layers overlay determined decentralize and centralize sites, based on slope, aspect and without plant space by means of Arc GIS software. Finally, with considering of the all conditions, tourists decentralize and centralize settlement and access roads, 16 centralize sites located query in 3 regions.]]>Andrea, E.G., W.B. Michael and S. Jane,200929212223Abdus Salam, M., G. Lindsay, C.M. Ross and M. Beveridge,2000115666Andrew, S.D. and S.L. Shaw,200714269278Bukenya, J.O.,20022002Bulut, Z. and H. Yilmaz,200821320Feng, R. and A.M. Morrison,200313127143Fung, T. and L.M. Marafa,2002632463248McAlpin, M.,2008415169Novotna, M.,2007153239Dondo, Ch., S.T. Bhunu and U. Rivett,200334197200