St. Johns River Central (Palakta, FL to Astor, FL Includes Lake George & Crescent Lake) 24″x36″ One-sided, Waterproof and Tear Resistant! Waterproof and Tear Resistant! GPS compatible with Marina listings, Lake structure, Road network and GPS points. Includes Lake George and Cresent Lake. Coverage from Palatka to Astor, FL. One of Three Maps of the St. Johns River.