NSW Marine LiDAR Topo-Bathy 2013 Geotif & Point Cloud

Brief description

Remotely sensed topographic (elevation) and bathymetric (depth) information were acquired for targeted sections of the NSW mid-north coast using Airborne LiDAR Bathymetry (ALB - a combination of Light Detection And Ranging (LiDAR) and Laser Airborne Depth Sounding (LADS) sensors) during November - December 2013. This resource defines total area of 139 km2 of data covering areas around the locations of 1) Lake Cathie and 2) Old Bar. Data were acquired by Pelydryn Ltd on behalf of NSW Office of Environment and Heritage (now the Department of Planning and Environment) using a HawkEye IIb bathymetric LiDAR system aboard VH-CWG Aircraft. Funding was provided through NSW Office of Environment and Heritage to acquire high-quality, high-resolution baseline data to support coastal erosion studies. The survey requirement was to provide high-resolution data at a minimum of 5 x 5 m laser spot spacings from the mean high-water mark to ~200m inland, and from the shore, seaward (LADS - bathymetry) up to maximum ~5km offshore (~20-40m water depth depending on in-water conditions). Positioning data were collected on the ellipsoid ITRF 2014 GRS80 in UTM Z56 and post-processed using local base stations (CORSnet NSW) to provide a Post Processed Kinematic GNSS solution for final aircraft trajectory before being applied to all data. Data types available are as GeoTiff (L3) or classified LAS format point cloud (L2) issued transformed to GDA94 Z56. Other data types may be available as ESRI topo-bathy rasters and contours, tab delimited ascii XYZ, unclassified LAS format data, relative reflectance data (terrestrial, marine) and Quality Control (QC) documentation (contained within survey report) via the NSW DPE Information Asset Register (IAR) (metadata, coverage shape), SEED (https://seed.nsw.gov.au or upon request. Users note: these surveys achieved maximum depths of ~15m and some artefacts may be apparent in the nearshore potentially associated with in-water conditions (i.e. algae; turbidity). The data are intended to inform coastal and marine management and are ‘not for navigation’.