gov.noaa.nmfs.inport:79717 eng UTF8 dataset Elevation OCM Partners 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 2026-05-11T19:07:45 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EPSG::5703 EPSG::6344 EPSG::6343 2024 USGS Lidar DEM: Houston, TX tx2024_houston_dem_m14135 2024 creation 2026 publication NOAA/NMFS/EDM 79717 https://www.fisheries.noaa.gov/inport/item/79717 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/TX_Houston_B24/TX_Houston_1_B24/reports/TX_Houston_WU300804_Report.pdf WWW:LINK-1.0-http--link Lidar Report - TX_Houston_1 Link to the NV5 lidar report for Lidar Report - TX_Houston_1 download https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/TX_Houston_B24/TX_Houston_2_B24/reports/TX_Houston_WU300805_Report.pdf WWW:LINK-1.0-http--link Lidar Report - TX_Houston_2 Link to the NV5 lidar report for Lidar Report - TX_Houston_2 download https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/TX_Houston_B24/TX_Houston_3_B24/reports/TX_Houston_WU300806_Report.pdf WWW:LINK-1.0-http--link Lidar Report - TX_Houston_3 Link to the NV5 lidar report for Lidar Report - TX_Houston_3 download https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/TX_Houston_B24/TX_Houston_4_B24/reports/TX_Houston_4_B24_WU300807_Report.pdf WWW:LINK-1.0-http--link Lidar Report - TX_Houston_4 Link to the NV5 lidar report for Lidar Report - TX_Houston_4 download https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/TX_Houston_B24/USGS_TX_Houston_B24_Project_Report.pdf WWW:LINK-1.0-http--link USGS Project Report Link to the USGS Project Report that provides information about the project, vertical accuracy results, the point classes and sensors used. download https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/TX_Houston_B24/ WWW:LINK-1.0-http--link USGS Additional Info Link to the reports, breaklines, metadata, and spatial metadata. 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 Product: These are Digital Elevation Model (DEM) data for Texas as part of the required deliverables for the TX_Houston_B24 project. Class 2 (ground) LiDAR points in conjunction with the hydro breaklines were used to create a 0.5 hydro-flattened Raster DEM. Geographic Extent: TX_Houston_1 (Work Unit 300808) - parts of 10 counties (Grimes, Hardin, Harris, Jefferson, Liberty, Montgomery, Polk, San Jacinto, Walker, Waller), covering approximately 3734 total square miles TX_Houston_2 (Work Unit 300805) - parts of 6 counties (Brazoria, Fort Bend, Harris, Matagorda, Waller, Wharton), covering approximately 2758 total square miles TX_Houston_3 (Work Unit 300806) - parts of 7 counties (Brazoria, Chambers, Fort Bend, Galveston, Harris, Jefferson, Liberty) , covering approximately 3260 total square miles TX_Houston_4 (Work Unit 300807) - parts of 9 counties (Austin, Colorado, Fayette, Fort Bend, Grimes, Matagorda, Waller, Washington, Wharton), covering approximately 1812 total square miles Dataset Description: The TX_Houston_B24 project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, 2024 Rev. A. Ground Conditions: LiDAR was collected in winter and spring 2024, while no snow was on the ground and rivers were at or below normal levels. 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. 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 high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 0.5 cell size. These raw LiDAR point cloud data were used to create classified LiDAR LAS files, intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. USGS, NV5 Geospatial 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 notPlanned EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS VERTICAL LOCATION > LAND SURFACE place Global Change Master Directory (GCMD) Location Keywords 23.3 LIDAR > Light Detection and Ranging instrument Global Change Master Directory (GCMD) Instrument Keywords 23.3 Airplane > Airplane platform Global Change Master Directory (GCMD) Platform Keywords 23.3 DEMs - partner (no harvest) project InPort otherRestrictions Cite As: OCM Partners, [Date of Access]: 2024 USGS Lidar DEM: Houston, TX [Data Date Range], https://www.fisheries.noaa.gov/inport/item/79717. 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. license To the extent possible under law, the U.S. Government has waived all copyright and related or neighboring rights to this dataset. 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 grid .5 eng; US elevation TX_Houston_1 (Work Unit 300808) - parts of 10 counties (Grimes, Hardin, Harris, Jefferson, Liberty, Montgomery, Polk, San Jacinto, Walker, Waller), covering approximately 3734 total square miles -96.0262103724 -94.4356098565 29.9677395864 30.8319673559 Area of collection for TX_Houston_1 (Work Unit 300808) - parts of 10 counties (Grimes, Hardin, Harris, Jefferson, Liberty, Montgomery, Polk, San Jacinto, Walker, Waller), covering approximately 3734 total square miles Dates of collection for TX_Houston_1 (Work Unit 300808) - parts of 10 counties (Grimes, Hardin, Harris, Jefferson, Liberty, Montgomery, Polk, San Jacinto, Walker, Waller), covering approximately 3734 total square miles | Currentness: Ground Condition 2024-02-17 2024-03-29 TX_Houston_2 (Work Unit 300805) - parts of 6 counties (Brazoria, Fort Bend, Harris, Matagorda, Waller, Wharton), covering approximately 2758 total square miles -96.036787 -95.454345 28.59246 29.978435 Area of collection for TX_Houston_2 (Work Unit 300805) - parts of 6 counties (Brazoria, Fort Bend, Harris, Matagorda, Waller, Wharton), covering approximately 2758 total square miles Dates of collection for TX_Houston_2 (Work Unit 300805) - parts of 6 counties (Brazoria, Fort Bend, Harris, Matagorda, Waller, Wharton), covering approximately 2758 total square miles | Currentness: Ground Condition 2024-02-17 2024-03-29 TX_Houston_3 (Work Unit 300806) - parts of 7 counties (Brazoria, Chambers, Fort Bend, Galveston, Harris, Jefferson, Liberty) , covering approximately 3260 total square miles -95.487463 -94.330274 28.843053 29.995064 Area of collection for TX_Houston_3 (Work Unit 300806) - parts of 7 counties (Brazoria, Chambers, Fort Bend, Galveston, Harris, Jefferson, Liberty) , covering approximately 3260 total square miles Dates of collection for TX_Houston_3 (Work Unit 300806) - parts of 7 counties (Brazoria, Chambers, Fort Bend, Galveston, Harris, Jefferson, Liberty) , covering approximately 3260 total square miles | Currentness: Ground Condition 2024-02-18 2025-01-31 TX_Houston_4 (Work Unit 300807) - parts of 9 counties (Austin, Colorado, Fayette, Fort Bend, Grimes, Matagorda, Waller, Washington, Wharton), covering approximately 1812 total square miles -96.655394 -95.954566 28.734019 30.262755 Area of collection for TX_Houston_4 (Work Unit 300807) - parts of 9 counties (Austin, Colorado, Fayette, Fort Bend, Grimes, Matagorda, Waller, Washington, Wharton), covering approximately 1812 total square miles Dates of collection for TX_Houston_4 (Work Unit 300807) - parts of 9 counties (Austin, Colorado, Fayette, Fort Bend, Grimes, Matagorda, Waller, Washington, Wharton), covering approximately 1812 total square miles | Currentness: Ground Condition 2024-02-18 2024-03-24 Raster File Type = GeoTIFF; Bit Depth/Pixel Type = 32-bit float; Raster Cell Size = 0.5; Interpolation or Resampling Technique = Triangulated Irregular Network (TIN), Linear Interpolation, Proprietary; Required Vertical Accuracy = 0.196 Zip GeoTIFF 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 U.S. Geological Survey 12201 Sunrise Valley Drive Reston VA 20191 USA https://usgs.gov WWW:LINK-1.0-http--link USGS Home Home page for USGS information distributor https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=14135/details/14135 WWW:LINK-1.0-http--link 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. download https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/ WWW:LINK-1.0-http--link Bulk Download Bulk download of data files in the original coordinate system. download dataset Horizontal Positional Accuracy 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 1,950 meters, an IMU error of 0.003 decimal degrees, and a GNSS positional error of 0.027 meters, this project was compiled to meet 0.32 meter horizontal accuracy at the 95% confidence level. Vertical Positional Accuracy This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class. USGS Determined DEM Vertical Accuracy: Non-Vegetated Vertical Accuracy (NVA) = 3.34 cm RMSE Vegetated Vertical Accuracy (VVA) = 21.65 cm at 95th Percentile Completeness Report Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The raw point cloud is of good quality and data pass Non-Vegetated Vertical Accuracy specifications. Conceptual Consistency Data cover 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. Hydro-Flattened Raster DEM Processing: Class 2 (Ground) LiDAR points in conjunction with the hydro-breaklines were used to create a 0.5 hydro-flattened raster DEM. Using automated scripting routines in proprietary software, GeoTIFF files were created for each tile. Each surface was reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface. 2025-01-01T00:00:00 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/TX_Houston_B24/TX_Houston_1_B24/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/TX_Houston_2_B24/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/TX_Houston_3_B24/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/TX_Houston_4_B24/TIFF/ 2026-05-08T00:00:00 NOAA Office for Coastal Management (843) 740-1202 coastal.info@noaa.gov processor USGS AWS GeoTIFF Files - TX_Houston_1 USGS https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/TX_Houston_1_B24/TIFF/ WWW:LINK-1.0-http--link USGS AWS GeoTIFF Files for TX_Houston_1 Source Citation URL information publisher USGS AWS GeoTIFF Files - TX_Houston_2 USGS https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/TX_Houston_2_B24/TIFF/ WWW:LINK-1.0-http--link USGS AWS GeoTIFF Files for TX_Houston_2 Source Citation URL information publisher USGS AWS GeoTIFF Files - TX_Houston_3 USGS https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/TX_Houston_3_B24/TIFF/ WWW:LINK-1.0-http--link USGS AWS GeoTIFF Files for TX_Houston_3 Source Citation URL information publisher USGS AWS GeoTIFF Files - TX_Houston_4 USGS https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/TX_Houston_B24/TX_Houston_4_B24/TIFF/ WWW:LINK-1.0-http--link USGS AWS GeoTIFF Files for TX_Houston_4 Source Citation URL information publisher