2022 NOAA NGS Topobathy Lidar DEM Post Hurricane Ida: Louisiana
Data Set (DS) | National Geodetic Survey (NGS)GUID: gov.noaa.nmfs.inport:73696 | Updated: December 3, 2024 | Published / External
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Summary
Short Citation
National Geodetic Survey, 2025: 2022 NOAA NGS Topobathy Lidar DEM Post Hurricane Ida: Louisiana, https://www.fisheries.noaa.gov/inport/item/73696.
Full Citation Examples
This data was collected by Woolpert using a Leica Chiroptera 4X sensor. The data was acquired between 20221004 to 20221021.
The data includes raster topobathy data in geotiff format created from ground (2), bathymetric point (40) and submerged object (43) lidar point values.
Distribution Information
-
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
-
GeoTIFF
Simple download of data files.
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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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.
Controlled Theme Keywords
COASTAL BATHYMETRY, COASTAL ELEVATION, elevation, TOPOGRAPHICAL RELIEF MAPS
Child Items
No Child Items for this record.
Contact Information
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-94.4° W,
-89.4° E,
29.7° N,
29° S
2022-10-04 - 2022-10-21
Item Identification
| Title: | 2022 NOAA NGS Topobathy Lidar DEM Post Hurricane Ida: Louisiana |
|---|---|
| Status: | Completed |
| Creation Date: | 2024-10 |
| Abstract: |
This data was collected by Woolpert using a Leica Chiroptera 4X sensor. The data was acquired between 20221004 to 20221021. The data includes raster topobathy data in geotiff format created from ground (2), bathymetric point (40) and submerged object (43) lidar point values. |
| Purpose: |
This data was collected to provide topographic/bathymetric lidar data, digital imagery, and digital shoreline for National Oceanic and Atmospheric Administration (NOAA) nautical charts and other uses. |
| Supplemental Information: |
The full workflow used for this project is found in the final project report submitted to NOAA. |
Keywords
Theme Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS
|
| Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY
|
| Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
|
| ISO 19115 Topic Category |
elevation
|
Spatial Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA
|
Instrument Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Instrument Keywords |
LIDAR > Light Detection and Ranging
|
Platform Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Platform Keywords |
Airplane > Airplane
|
Physical Location
| Organization: | Office for Coastal Management |
|---|---|
| City: | Charleston |
| State/Province: | SC |
Data Set Information
| Data Set Scope Code: | Data Set |
|---|---|
| Data Set Type: | Elevation |
| Maintenance Frequency: | None Planned |
| Data Presentation Form: | Model (digital) |
| Distribution Liability: |
Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Geodetic Survey, the Office for Coastal Management, or its partners. |
| Data Set Credit: | We request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these data in a report, publication, or presentation. |
Support Roles
Data Steward
| Date Effective From: | 2024 |
|---|---|
| Date Effective To: | |
| Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
| Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address: | coastal.info@noaa.gov |
| Phone: | (843) 740-1202 |
| URL: | https://coast.noaa.gov |
Distributor
| Date Effective From: | 2024 |
|---|---|
| Date Effective To: | |
| Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
| Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address: | coastal.info@noaa.gov |
| Phone: | (843) 740-1202 |
| URL: | https://coast.noaa.gov |
Metadata Contact
| Date Effective From: | 2024 |
|---|---|
| Date Effective To: | |
| Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
| Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address: | coastal.info@noaa.gov |
| Phone: | (843) 740-1202 |
| URL: | https://coast.noaa.gov |
Originator
| Date Effective From: | 2024 |
|---|---|
| Date Effective To: | |
| Contact (Organization): | National Geodetic Survey (NGS) |
| Address: |
1315 East-West Hwy Silver Spring, MD 20910 |
| URL: | https://geodesy.noaa.gov/ |
Extents
| Currentness Reference: | Ground Condition |
|---|
Extent Group 1
Extent Group 1 / Geographic Area 1
| W° Bound: | -94.4 | |
|---|---|---|
| E° Bound: | -89.4 | |
| N° Bound: | 29.7 | |
| S° Bound: | 29 |
Extent Group 1 / Time Frame 1
| Time Frame Type: | Range |
|---|---|
| Start: | 2022-10-04 |
| End: | 2022-10-21 |
Spatial Information
Spatial Representation
Representations Used
| Vector: | Yes |
|---|
Reference Systems
Reference System 1
Coordinate Reference System |
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Access Information
| Security Class: | Unclassified |
|---|---|
| Data Access Procedure: |
Data is available online for bulk and custom downloads. |
| Data Access Constraints: |
None |
| Data 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 Information
Distribution 1
| Start Date: | 2023 |
|---|---|
| End Date: | Present |
| Download URL: | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10201 |
| Distributor: | NOAA Office for Coastal Management (NOAA/OCM) (2024 - Present) |
| File Name: | Customized Download |
| Description: |
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. |
| File Type (Deprecated): | ZIP |
| Compression: | Zip |
Distribution 2
| Start Date: | 2023 |
|---|---|
| End Date: | Present |
| Download URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/dem/NGS_Hx_Ida_LA_Topobathy_2022_10201/index.html |
| Distributor: | NOAA Office for Coastal Management (NOAA/OCM) (2024 - Present) |
| File Name: | Bulk Download |
| Description: |
Simple download of data files. |
| File Type (Deprecated): | LAZ |
| Distribution Format: | GeoTIFF |
URLs
URL 1
| URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10200/supplemental/NOAA_LA2208_QualityAssuranceReport.pdf |
|---|---|
| Name: | Report |
| URL Type: |
Online Resource
|
| File Resource Format: | |
| Description: |
Acquisition and Processing Report |
URL 2
| URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10020/supplemental/extent_ngs_hx_ida_2022_m10020.kmz |
|---|---|
| Name: | Browse Graphic |
| URL Type: |
Browse Graphic
|
| File Resource Format: | kmz |
| Description: |
This graphic shows the lidar footprint for this dataset. |
Technical Environment
| Description: |
OS Independent |
|---|
Data Quality
| Horizontal Positional Accuracy: |
Woolpert performed acquisition and calibration of all lidar data, as well as classification, generation of derivative products, and absolute positional accuracy computation. The DEMs are derived from the source lidar and inherit the accuracy of the source data. The DEMs are created using controlled and tested methods to limit the amount of error introduced during DEM production. |
|---|---|
| Vertical Positional Accuracy: |
Woolpert performed acquisition and calibration of all lidar data, as well as classification, generation of derivative products, and absolute positional accuracy computation. The DEMs are derived from the source lidar and inherit the accuracy of the source data. The DEMs are created using controlled and tested methods to limit the amount of error introduced during DEM production. The results of the comparison of the topo ground control points with the Louisiana shoreline point cloud showed good agreement with an average dZ of -0.016m. The comparison of NVA and FVA check points to the point cloud showed similar results. The NVA points had an RMSE of 0.041m from the point cloud and the FVA at 95th percent confidence level in open terrain using RMSE (z) x 1.9600 was 0.080m |
| Conceptual Consistency: |
Not applicable |
Data Management
| Have Resources for Management of these Data Been Identified?: | Yes |
|---|---|
| Approximate Percentage of Budget for these Data Devoted to Data Management: | Unknown |
| Do these Data Comply with the Data Access Directive?: | Yes |
| Actual or Planned Long-Term Data Archive Location: | NCEI-CO |
| How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?: |
Data is backed up to tape and to cloud storage. |
Lineage
Sources
Acquisition and Processing
| Contact Role Type: | Originator |
|---|---|
| Contact Type: | Organization |
| Contact Name: | Woolpert |
Process Steps
Process Step 1
| Description: |
This dataset encompasses 4319 500m x 500m tiles. Both green and NIR lidar data were acquired. Woolpert acquired, calibrated, and performed the refraction correction of the lidar data. Light travels at different speeds in air versus water and its direction of travel or angle is changed or refracted when entering the water column. The refraction correction process corrects for this difference by adjusting the depth (distance traveled) and horizontal position (change of angle/direction) of the lidar data acquired within water. Relative accuracy of the swaths compared to overlapping and adjacent swaths was verified through the use of Delta-Z (DZ) orthos created in LASTools software. Profiles of elevated planar features, such as roofs, were used to verify horizontal alignment between overlapping swaths. The NovAtel software was utilized for GPS and inertial processing, Data were processed to an initial LAS format using the Leica Lidar Survey Studio software. Algorithms in TerraScan was used to create the initial ground surface. All lidar data was peer-reviewed. QAQC also included creating void polygons for use during review. All necessary edits were applied to the dataset. LASTools was used to update LAS header information, including all projection and coordinate reference system information. The final lidar data is in LAS format 1.4 and point data record format 6. The National Oceanic and Atmospheric Administration (NOAA) received files in laz format. The files contained lidar elevation and intensity measurements of the Louisiana Shoreline project. The data is in UTM Zone 15N coordinates and ellipsoid elevations in meters. Horizontal Datum-NAD83 (2011) epoch: 2010.0 Projection-UTM Zone 15 North Horizontal Units-meters Vertical Datum-Ellipsoid Vertical Units-meters The final classification scheme is as follows: 1-Unclassified 2-Ground 7-Low Noise 9-Topo Water Surface 18-High Noise 40-Bathymetric Point 41-Bathymetric Water Surface 42-Synthetic Derived Water Surface 43-Submerged Object 44-International Hydrographic Organization (IHO) S-57 Object 64-Submerged Aquatic Vegetation 65-Bathymetric Bottom Temporal Changes |
|---|---|
| Process Date/Time: | 2023-08-11 00:00:00 |
| Process Contact: | National Geodetic Survey (NGS) |
Process Step 2
| Description: |
The lidar data was transformed from ellipsoid heights to orthometric heights, referenced to NAVD88 Geoid 18, meters. The lidar data in orthometric heights was used to create the final topobathymetric DEMs in orthometric heights. Horizontal Datum-NAD83 (2011) epoch: 2010 Projection-UTM Zone 15 North Horizontal Units-meters Vertical Datum-NAVD88 - Geoid18 Vertical Units-meters Lidar data classes 2, 40 and 43 were used to generate a raster in geotiff format with 1 meter pixel resolution for the entire area. The raster was then clipped to the tile grid and named according to project specifications to result in tiled 5000m x 5000m topobathymetric DEMs. Bathy void polygons represent bathymetric areas with no bathymetric bottom returns and accompany the DEMs. Void polygon creation is described in the final project report. |
|---|---|
| Process Date/Time: | 2023-08-11 00:00:00 |
| Process Contact: | National Geodetic Survey (NGS) |
Catalog Details
| Catalog Item ID: | 73696 |
|---|---|
| GUID: | gov.noaa.nmfs.inport:73696 |
| Metadata Record Created By: | Maryellen Sault |
| Metadata Record Created: | 2024-10-21 17:14+0000 |
| Metadata Record Last Modified By: | Blake Waring |
| Metadata Record Last Modified: | 2024-12-03 19:48+0000 |
| Metadata Record Published: | 2024-11-07 |
| Owner Org: | NGS |
| Metadata Publication Status: | Published Externally |
| Do Not Publish?: | N |
| Metadata Last Review Date: | 2022-04-11 |
| Metadata Review Frequency: | 3 Years |
| Metadata Next Review Date: | 2025-04-11 |