ST JOHNS RIVER: Latitude = 30.400000, Longitude = -81.396667, Zoom=13

River Mile
Types to Include:
Points of Interest
Statute Miles Nautical Miles  Kilometers

Right Clicking anywhere on the map displays latitude, longitude, and address at that location:
Navigation Mile 0 of the St. Johns River is at the mouth as it empties into the Atlantic Ocean. It's source is the many springs of Central Florida and it is the only North flowing river in the U.S. This St. Johns River viewer covers Points of Interest from mile 0 to 189, Lake Harney, and beyond to Lake Hellen Blazes. For access and boat ramps, click HERE .