That is correct nursebeeme.
I have read some on this before, especially in regards to serial killers and determining their possible locations by using the familiar range.
I did something similar in this case as well before Jennifer's body was discovered, by drawing 10 mile radii circles around each of the things pertinent to the case, assigning a yellow circle around the Ramsaran residence, a red circle around the site where the van was found, and a blue circle around the Moon Hill/SR 23 intersection.
On my map, Jennifer's body was located on the fringe of the red circle.
I've included that map here, so that the moderators can add it to the Media and Map thread.
http://oi48.tinypic.com/33m4lts.jpg
I should point out that the location marked "Body Found" on the map is wrong. Jennifer's body was still located in that vicinity on the outer fringes of the red circle (purple area), but located a little to the east of there.
I had made the "Body Found" notation on the map, the night that they had discovered her body, and before Jennifer was positively identified.
The coordinates used on the map are as follows:
Ramsaran Sheff Road residence = 42.5697665, -75.4342695
Moon Hill Road Intersection on State Road 23 = 42.597462, -75.599113
Plank Road Manor Apartments = 42.541839, -75.534604
Radius distance: 10 mi (16.09 km)
Proper approximate coordinates for the location where Jennifer's body was discovered are as follows:
Center Road = (approximate) 42.603539, -75.681231