I am sorry but it looks like I am noticing a first error in this otherwise GREAT site. Hallan Cemi is not exactly on the location which you gave the geographic coordinates for! According to the coordinates given, it's giving the location close to Sanliurfa, which is wrong, as it should be close to Batman! I am still searching on my own for the correct coordinates of Hallan Cemi, so I might help there unless you correct it before I do.
Thanks!
Something is not right. This message is just to keep things from messing up down the road