How about relevant to the established datum... at the time that data was
collected.... and the accuracy of the equipment utilized to derive it.

BTW - Lots of people disagree with me.... none that count though.

CM


"Bob Crantz" wrote in message
k.net...
http://www.nation.com.pk/daily/dec-2004/29/index2.php

Two USGS PhD's seem to disagree with you. Remember, movement is relative -
relative to what?