NGS personnel spent several days in the field collecting obstruction data. A total of sixty-one (61) features were verified or positioned during this special survey. The majority of features were positioned by obstruction (triangulation) baseline methods with a common side horizontal closure side check and three (3) elevation determinations providing extra vertical checks.

The images below show Stu Kuper, Chris Parrish and Jason Woolard at a site near the Gainesville Regional Airport.
 

The images below depict the type of obstructions identified and surveyed by NGS personnel. Analysis is ongoing to determine how these objects are detected using airborne LIDAR.