2017 NOAA/MCP Topobathy Lidar: Blue Hill Bay, ME - SHOALS Sensor

Fugro was contracted in July 2017 by the State of Maine Department of Marine Resources (SMDMR), Maine Coastal Program (MCP), and the NOAA Office for Coastal Management (OCM) to conduct an Airborne LiDAR Bathymetry (ALB) survey in the vicinity of Blue Hill Bay in Maine, and to deliver fully processed and verified hydrographic survey data.The ALB survey was conducted with the SHOALS-1000T and Riegl VQ-820-G lidar systems in a concurrent acquisition. The SHOALS system, with a high power laser, provided the better probability for deep sounding detections at a reduced point density (about 0.15 pts/m2); whilst the VQ-820-Q provided high density coverage (up to 8.5 pts/m2) but at reduced depth detection.

This metadata record describes the topographic and bathymetric LiDAR elevations generated from data collected with the SHOALS-1000T LiDAR system along Blue Hill Bay on the coastline of Maine. Data were collected by Fugro for NOAA OCM. The SHOALS system is a bathymetric LiDAR sensor for use in coastal mapping and charting activities because the laser's ability to penetrate the water column and detect targets up to 2.5 times the Secchi disk depth. Survey coverage was based on a delimiting polygon provided by NOAA OCM, which envelopes the area between the 0 m contour (NAVD88) down to approximated -10 meters. An additional horizontal buffer of 100 meters from the 0 m contour expanded the survey area coverage to include the adjacent emerged topography. SHOALS data have been processed on Optech SHOALS-GCS and QPS Fledermaus software packages for: auto-processing; calibration, cleaning and editing, validation, basic classification, and exported to LAS format.

In addition to these lidar point data, the bare earth Digital Elevation Models (DEM) created from the lidar point data are also available. These data are available for custom download at the link provided in the URL section of this metadata record.

A topographic and bathymetric reflectance raster are also available. These data are available for download at the link provided in the URL section of this metadata record.

A link to custom download the concurrently collected topographic and bathymetric data (collected with the Riegl VQ-820-G lidar system) is provided in the URL section of this metadata record.

Data and Resources

Additional Info

Field Value
Last Updated May 10, 2020, 02:00
Created January 3, 2020, 01:14
access_constraints ["Access Constraints: None | Use Constraints: Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. | Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners."]
bbox-east-long -68.432
bbox-north-lat 44.313
bbox-south-lat 44.194
bbox-west-long -68.566
contact-email coastal.info@noaa.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": ""}]
frequency-of-update asNeeded
graphic-preview-description This graphic displays the footprint for this lidar data set.
graphic-preview-file https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/8526/supplemental/me2017_blue_hill_bay_shoals_m8526.kmz
graphic-preview-type KML
guid gov.noaa.nmfs.inport:52596
licence ["NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose."]
metadata-date 2020-02-04T00:00:00
metadata-language eng
progress completed
resource-type dataset
responsible-party [{"name": "NOAA Office for Coastal Management", "roles": ["pointOfContact", "custodian"]}]
spatial {"type": "Polygon", "coordinates": [[[-68.566, 44.194], [-68.432, 44.194], [-68.432, 44.313], [-68.566, 44.313], [-68.566, 44.194]]]}
spatial_harvester true
temporal-extent-begin 2017-06-25
temporal-extent-end 2017-07-05