Fugro Pelagos, under contract to GRW Engineers, Inc., performed hydrographic and topographic Lidar data acquisition and processing for the United States Army Corps of Engineers at the Scarborough Entrance in Maine. The primary purpose of the survey was to obtain existing conditions of the harbor entrance with a strong focus on the conditions of the jetties, entrance channel, nearshore bathymetry and beach. The survey took place on July 25, 2003, during which Fugro Pelagos collected GPS ground control and utilized the SHOALS-1000T in a Beechcraft King Air A90 aircraft to collect bathymetric Lidar data, topographic Lidar data and digital aerial photography.

Water depths ranged from the shoreline to approximately 10m, depending on water clarity. The bathymetric laser was operated to achieve 4m x 4m spot spacing flying at 300m altitude and approximately 162 knots. The survey lines were planned with 20% overlap. The topographic laser was operated to achieve 2m x 1.6m spot spacing flying at 700m altitude and approximately 155 knots. The survey lines were planned to achieve shoreline data in the survey area inshore to 100m and additional lines were run to collect topographic data over the jetties.

Project Examples:
NOAA - Hydrographic Charting
USACE - Port and Harbor Survey
USACE - Various Applications
Various - Coastal Zone Management