On 01/19/2011 12:27 PM, Bob Dobbs wrote:
dave wrote:

San Diego, like most of populated California, is 3 dimensional. That 40'
figure usually refers to a certain central point, e.g. the Main Post
Office. In San Diego it could mean the Airport, which is right downtown.
Parts of San Diego have more hills than parts of San Francisco.

The airport is often considered to be about 20 feet elevation
http://bit.ly/hBor5f says 14 feet
where I live the GPS confirms the local topo map
of 387 feet.
Of course at any of the beaches there's zero feet AMSL
or Cowles mountain has a 1591' benchmark but says
1592 he http://bit.ly/1Hz7O8

The Northridge Earthquake lifted Oat Mountain 18". That's a big
mountain. Jumped up a foot and a half, and stayed there.