Painted Turtle

Although I am not 100 percent positive, I believe this is an Eastern Painted Turtle.  I saw it headed across a field probably between a small water stream nearby and a larger body of water in the direction it was headed.  While walking near it, I noted that any time I wanted to get a photo from a different angle it was nearly impossible to do that.  As I attempted to walk around it, the turtle kept changing direction always keeping me behind it.  After walking it around in circles two or three times, I walked away from it, and it headed away in the same direction I originally saw it going.  I obviously did not measure it, but I would estimate its shell at about ten inches long and seven inches wide.