I suppose computers have eliminated the margin of error in calculating  
distances from photographs, but a word of caution is in order for those who try  to 
do this by seat of the pants. California State Parks, Planning Division, used 
 an historical photo to scale the size of the flagpole at Old San Diego and 
then  created what they believed to be an accurate representation. This was 
done  before computers, about thirty years ago. The problem is the angles of the  
photos are slightly distorted and many people over the years have concluded 
the  modern flagpole is many times larger than the historical one. (Of course, 
State  Parks employees hotly defend the flagpole as accurate.) Just a  thought.
 
Ron May
Legacy 106, Inc.



************************************** AOL now offers free email to everyone. 
 Find out more about what's free from AOL at http://www.aol.com.