Seaside Engineering And Surveying (SEAS) has the ability to install one or more of several remote sensing systems on our survey vessels. For projects that require less dense datasets, the Riegl VZ-400 Laser Scanner is the system of choice. This platform allows for the collection of a lightweight LiDAR dataset at the rate of 125,000 points per second in an 100° field of view. This type of data collection lends itself to surveying beaches, riverbanks, breakwaters, jetties, navigation aids, etc. where a DTM, CAD lines and point features are all that is needed to depict the planimetrics in a traditional topographic map. The system has a range of ~500 meters. Accuracy varies by distance, but typical accuracies in the 2-3 cm range are achievable. Position and attitude correction is handled by SEAS’ Applanix PosMV Wavemaster System.
For projects that require very rich high resolution datasets with images, the team installs the Optech Lynx Mobile Mapper on the survey vessel. This platform allows for the collection of a LiDAR dataset at a rate of 400,000 points per second in a full 360° field of view and georeferenced 5 MP images at the rate of 6 images per second. This type of data collection lends itself to surveying large structures such as bridges, locks, dams, offshore oil platforms, etc. where the data is used to create 3D CAD models for these structures. The system has a range of ~ 100 meters (330 ft). Accuracy varies by distance, but typical accuracies in the 1-2 cm range are achievable. Position and attitude correction is handled by an Applanix PosLV System. The data is collected with the Optech Lynx Survey software and post processed with the Optech DashMap, Applanix POSPac, TerraScan, TerraMatch and TerraPhoto in MicroStation.
SEAS has completed Mobile LiDARsurveys of hundreds of bridges, and 2000 miles of Navigable Waterways!