gov.noaa.nmfs.inport:52604 eng UTF8 dataset Elevation Office for Coastal Management resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 2017 NOAA/MCP Topobathy Lidar DEM: Blue Hill Bay, ME - SHOALS Sensor me2017_blue_hill_bay_dem_shoals_m8528_metadata publication NOAA/NMFS/EDM 52604 https://www.fisheries.noaa.gov/inport/item/52604 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8527 WWW:LINK-1.0-http--link Citation URL Link to custom download the DEM created from the concurrently collected topographic and bathymetric data (collected with the RIEGL VQ-820-G lidar system). download https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/8526/supplemental/me2017_blue_hill_bay_shoals_m8526_report.pdf WWW:LINK-1.0-http--link Dataset report Link to data set report. download https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/8526/supplemental/shoals_reflectance.zip WWW:LINK-1.0-http--link Citation URL Link to the bathymetric and topographic reflectance rasters. download https://coast.noaa.gov/dataviewer/ WWW:LINK-1.0-http--link NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. download 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 bare earth, 2 meter digital elevation model (DEM) created from 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 bare earth Digital Elevation Model (DEM) data, the lidar point data that these DEM data were created from, 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 bare earth DEM that was created from 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. Conduct an Airborne Bathymetric LiDAR survey over Blue Hill Bay and deliver point cloud data correctly georeferenced and processed for refraction correction of underwater points. Bathymetric data will be used for improving digital elevation models and mapping to characterize nearshore benthic habitats; improve coastal flood inundation predictions; and provide accurate topographic/bathymetric digital elevation models for modeling, engineering, and planning needs. National Oceanic and Atmospheric Administration and the Maine Coastal Program completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian asNeeded https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/8526/supplemental/me2017_blue_hill_bay_shoals_m8526.kmz This graphic displays the footprint for this lidar data set. KML EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION theme Global Change Master Directory (GCMD) Science Keywords 17.0 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MAINE VERTICAL LOCATION > LAND SURFACE VERTICAL LOCATION > SEA FLOOR place Global Change Master Directory (GCMD) Location Keywords 20.8 LIDAR > Light Detection and Ranging instrument Global Change Master Directory (GCMD) Instrument Keywords 17.2 Airplane > Airplane DEM > Digital Elevation Model platform Global Change Master Directory (GCMD) Platform Keywords 17.2 Blue Hill Bay U.S. East Coast place Geographic Names Information System DEM National Oceanic and Atmospheric Administration Point data SHOALS beach erosion theme DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 DEMs project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: 2017 NOAA/MCP Topobathy Lidar DEM: Blue Hill Bay, ME - SHOALS Sensor [Data Date Range], https://www.fisheries.noaa.gov/inport/item/52604. 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. otherRestrictions Access Constraints: None otherRestrictions 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. otherRestrictions 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. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 52604 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/52604.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US elevation imageryBaseMapsEarthCover oceans -68.566 -68.432 44.194 44.313 Data collected: June 25, 29, July 5, 2017 | Currentness: Ground Condition 2017-06-25 2017-07-05 Water turbidity conditions at the time of survey prevented full bottom coverage results on the assigned areas. Every effort was made to recover as much valid point depths; gaps in the coverage are mostly caused by negative bottom detection or by the removal of data below the accuracy tolerance. Zip GeoTIFF Uncompressed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8528 WWW:LINK-1.0-http--link Customized Download Create custom data files by choosing data area, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. download https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/ME_Blue_Hill_Bay_SHOALS_DEM_2017_8528/index.html WWW:LINK-1.0-http--link Bulk Download Bulk download of data files in orthometric heights in meters. download dataset Horizontal Positional Accuracy The positions were obtained using post processed GNSS methods. The horizontal accuracy is better than ±4.49 m (2-sigma) at ground level above water. Vertical Positional Accuracy The vertical accuracy is better than ±0.70 m (2-sigma) at laser extinction level below water. Completeness Report Gaps in coverage are due to water quality conditions at the time of survey. Conceptual Consistency The data provided in these files were constricted to IHO SP-54 Order 1b accuracy standards. The airborne raw files from the SHOALS sensor are downloaded into SHOALS-GCS software version 6.32. The system collects bathymetric LiDAR data at 2.5 kHz Pulse Repetition Rate for an approximated point density of 0.15 pts/m2 at 400 m altitude (AGL) and 100 kts (speed over ground). The SHOALS system also collects RGB imagery at 1 Hz using a Prosilica GX330 digital camera. Aircraft position, velocity, angular and acceleration information collected with an Applanix POS AV 510 v6 equipment were processed using Applanix POSPac v 7.1 software to produce a Smoothed Best Estimate Trajectory (SBET) solution file that is used by RiProcess to produce 3D positions for each LiDAR shot (point clouds). SHOALS-GCS auto-processing routine estimates the water surface and bottom surface points for each laser shot and applied the refraction correction automatically. Upon inspection and QA/QC in Fledermaus software version 7.7, anomalous data were flagged as invalid and bathymetry properly validated. All LiDAR points including bathymetric, topographic, water surface, noise and rejections were exported to LAS format. Elevations referenced to NAVD88 datum were reduced with the application with VDatum v3.6.1. and GEOID12b. Data was exported to LAS format 1.4 for delivery. LAS data has the following classification: Emerged and topographic points (1), Noise and Rejections (7), Bathymetry (40), Derived water surface (42), and Submerged objects (wrecks, rocks, pilings) (43). The delivered LAS files were reviewed and processed to classify the point cloud and compute vertical accuracy. A variety of LAStools executables were used to tile the swaths, classify points (noise, ground, and bathymetric points), generate gridded products, and perform the final quantitative accuracy assessment. Global Mapper was used to perform qualitative assessments of the point clouds and gridded products at each step of the classification process. ArcGIS Pro was used to organize and visualize all delivered products and generate web services for team reviews. The final classification includes class 1 (unclassified), class 2 (bare ground), class 7 (low noise), class 40 (bathymetric point), class 42 (derived water surface), and class 43 (submerged objects). 2018-04-01T00:00:00 The SHOALS digital terrain model (DTM) was produced from the classified lidar points using LAStools. Points were filtered to keep only class 2 (ground) and class 40 (bathymetric point). The filtered points were used to construct a triangulated irregular network (TIN) with no triangles being built with edges longer than 10 meters. The TIN was then rasterized onto a 2 meter resolution digital elevation model (DEM). 2018-04-03T00:00:00 Office for Coastal Management processor The data were in UTM Zone 19 North coordinates and NAVD88 (Geoid12B) elevations in meters. The bare earth raster files were at a 2 meter grid spacing. OCM performed the following processing on the data for Digital Coast storage and provisioning purposes: 1. Copied the files to https. 2018-05-09T00:00:00 Office for Coastal Management processor