Gregory Helmer, a professional and registered land surveyor in California, Colorado, Nevada and Arizona, is senior vice president, GPS Services for RBF Consulting in Irvine, Calif. He has 33 years of experience in the profession. Dr. David M. Crockett, FACS, FAAP, also contributed greatly to this article. He is an Eagle Scout from the Class of 1969 and has been a Scoutmaster since 1994.