172 THE FLORIDA ANTHROPOLOGIST 2006 VOL. 59(3-4) Figure 14. Overlay of hand drawn, mapped features (Weisman et. al. 2000: 344) on scan data contour map. Note the parallax phenomenon causes drift from left to right, with the most evident distortion along the eastern half of the Circle. Figure 15. Map showing feature locations drawn with standard techniques against contour map produced from scan data.