78599 ny2024_ny_nh_gaps_dem_m13787 Data Set Published / External 49404 DEMs - partner (no harvest) Project Completed 2024 2025 Original Product: These lidar data are processed Quality Level 2 (QL2) Bare-Earth DEM files, formatted to individual 1500 m x 1500 m tiles at 1 meter resolution. Original Dataset Geographic Extent: New York - One area covers 2284 sq miles New Hampshire - Two separate areas one that is 125 sq miles and the other 462 sq miles in area totaling 587 sq miles. Original Dataset Description: The New York and New Hampshire Gaps Lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal point density of 2 points per square meter for QL2 data. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification 2024, revision A. The data was developed based on a horizontal projection/datum of NAD83 (2011), UTM 18N, meters and vertical datum of NAVD88 (GEOID18), meters. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to individual 1500 m x 1500 m tiles and as tiled bare earth DEMs; all tiled to the same 1500 m x 1500 m schema. Ground Conditions: Lidar was collected in the spring 2024, while no snow was on the ground. This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the GeoTIFF files hosted by USGS on Amazon Web Services. This task is for providing a spring 2024 leaf-off and snow-free lidar survey over an area of approximately 2,872 square miles. This project will support the 3DEP mission, the Natural Resources Conservation Service (NRCS) high-resolution elevation enterprise, as well as many state and local agencies. To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these LiDAR data was to produce an auto generated elevation models (DEMs) with a 1 meter cell size. Raster File Type = TIFF Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 1 Meter Interpolation or Resampling Technique = Triangulated Irregular Network Required Vertical Accuracy = 19.6 cm NVA Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW HAMPSHIRE Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW YORK Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > LAND SURFACE Instrument Global Change Master Directory (GCMD) Instrument Keywords LIDAR > Light Detection and Ranging Platform Global Change Master Directory (GCMD) Platform Keywords Airplane > Airplane Office for Coastal Management Charleston SC Data Set Elevation Unknown Model (digital) No limits or restrictions. Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners. USGS, Survey and Mapping, LLC Data Steward 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2025 Organization U.S. Geological Survey 12201 Sunrise Valley Drive Reston VA 20191 USA https://usgs.gov USGS Home Home page for USGS Online Resource Metadata Contact 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -72.02 -71.21 44.63 43.81 Area of collection for the 2 areas in New Hampshire (NY_NHGaps_2, Work Unit 300714) Range 2024-05-21 2024-06-16 Dates of collection for the 2 areas in New Hampshire (NY_NHGaps_2, Work Unit 300714) -74.56316 -73.21953 44.29147 43.34302 Area of collection for the New York (NY_NHGaps_1, Work Unit 300713) portion of this dataset. Range 2024-05-07 2024-06-16 Date of collection for the New York (NY_NHGaps_1, Work Unit 300713) portion of this dataset. Yes No No No No Vertical EPSG:5703 NAVD88 height North American Vertical Datum 1988 1 Gravity-related height H metre up Projected EPSG:6347 NAD83(2011) / UTM zone 18N NAD83 (National Spatial Reference System 2011) GRS 1980 6378137 298.257222101 NAD83(2011) UTM zone 18N Transverse Mercator Latitude of natural origin 0° 0' 0" N Longitude of natural origin 75° 0' 0" W Scale factor at natural origin 0.9996 False easting 500000 metre False northing 0 metre 1 Easting E metre east 2 Northing N metre north Custom Universal (CC0 1.0) Public Domain Dedication https://creativecommons.org/publicdomain/zero/1.0/ To the extent possible under law, the U.S. Government has waived all copyright and related or neighboring rights to this dataset. Unclassified Data is available online for bulk and custom downloads. None 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. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=13787/details/13787 2025 Organization NOAA Office for Coastal Management Customized Download Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base. Not Applicable Zip https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/NY_NH_Gaps_D24/ 2025 Organization U.S. Geological Survey Bulk Download Bulk download of data files in the original coordinate system. GeoTIFF https://coast.noaa.gov/dataviewer/ NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) Online Resource HTML 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. https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/NY_NH_Gaps_D24/NY_NHGaps_1_D24/reports/NY_NH_Gaps_1_D24_LIDAR_REPORT.pdf Lidar Report - New York (NY_NHGaps_1, Work Unit 300713) Online Resource pdf Link to the lidar report for the New York portion of this dataset. https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/NY_NH_Gaps_D24/NY_NHGaps_2_D24/reports/NY_NH_Gaps_2_D24_LIDAR_REPORT.pdf Lidar Report - New Hampshire (NY_NHGaps_2, Work Unit 300714) Online Resource pdf Link to the lidar report for the New Hampshire portion of this dataset. https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/NY_NH_Gaps_D24/USGS_NY_NH_Gaps_D24_Project_Report.pdf USGS Project Report Online Resource pdf Link to the USGS Project Report that provides information about the project, vertical accuracy results, and the point classes and sensors used. https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/NY_NH_Gaps_D24/ USGS Additional Info Online Resource Link to the reports, breaklines, metadata, and spatial metadata. LiDAR horizontal accuracy is a function of Global Navigation Satellite System (GNSS) derived positional error, flying altitude, and INS derived attitude error. The obtained RMSEr value is multiplied by a conversion factor of 1.7308 to yield the horizontal component of the National Standards for Spatial Data Accuracy (NSSDA) reporting standard where a theoretical point will fall within the obtained radius 95% of the time. Based on a flying altitude of 2286 meters, an IMU error of 0.0025 decimal degrees, and a GNSS positional error of 0.05 meters, this project was compiled to meet 0.55 meter horizontal accuracy at 95% confidence level. This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2023) Ed 1.0 for a 10-cm RMSEz Vertical Accuracy Class. USGS Determined DEM Vertical Accuracy: Non-Vegetated Vertical Accuracy (NVA) = 5.84 cm RMSE Vegetated Vertical Accuracy (VVA) = 15.9 cm at the 95th Percentile The dataset was reviewed to ensure completeness and accuracy. Data covers the entire area specified for this project. The NOAA Office for Coastal Management (OCM) ingested references to the USGS GeoTIFF files that are hosted on Amazon Web Services (AWS), into the Digital Coast Data Access Viewer (DAV). The DAV accesses the raster data as it resides on AWS. USGS AWS GeoTIFF Files - New Hampshire (NY_NHGaps_2) Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/NY_NH_Gaps_D24/NY_NHGaps_2_D24/TIFF/ USGS AWS GeoTIFF Files for New Hampshire (NY_NHGaps_2) USGS AWS GeoTIFF Files - New York (NY_NHGaps_1) Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/NY_NH_Gaps_D24/NY_NHGaps_1_D24/TIFF/ USGS AWS GeoTIFF Files for New York (NY_NHGaps_1) 1 Using LP360 software a 1 meter 32-bit floating point DEM raster in GeoTIFF format (.tif) were created using the ground classified lidar points with the hydro-flattened breaklines. The files are delivered in 1000m by 1500m tiles. 2024-12-04T00:00:00 2 The NOAA Office for Coastal Management (OCM) created references to the USGS GeoTIFF files that were ingested into the NOAA Digital Coast Data Access Viewer (DAV). No changes were made to the data. The DAV will access the raster data as it resides on Amazon Web Services (AWS). These are the GeoTIFF files that are being accessed: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/NY_NH_Gaps_D24/NY_NHGaps_1_D24/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/NY_NH_Gaps_D24/NY_NHGaps_2_D24/TIFF/ 2025-11-18T00:00:00 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource gov.noaa.nmfs.inport:78599 Rebecca Mataosky 2025-11-17T21:44:54 Rebecca Mataosky 2025-11-18T20:26:47 2025-11-18 OCM Partners OCMP 1002 Public No No 2025-11-18 1 Year 2026-11-18