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Summary
Item Identification
Keywords
Physical Location
Data Set Info
Support Roles
Extents
Spatial Info
Access Info
Distribution Info
URLs
Tech Environment
Data Quality
Lineage
Related Items
Catalog Details

Summary

Browse graphic

Short Citation
OCM Partners, 2024: 2011 USACE NCMP Topobathy Lidar DEM: Gulf Coast (AL, LA, MS), https://www.fisheries.noaa.gov/inport/item/65899.
Full Citation Examples

Abstract

These files contain rasterized topographic elevations generated from topographic lidar data classified as ground, and valid bathymetric data. These data were collected by the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system along the coast of Mississippi. CHARTS integrates topographic and bathymetric lidar sensors, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Data coverage generally extends along the coastline from the waterline inland 500 meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry). Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. The 3-D position data are sub-divided into a series of LAS files, each covering approximately 5 kilometers of shoreline. The file index is provided by the shape file, MS_boxes.shp, and the numbers used to identify files are in the "Box" field of the shape file. The LAS file naming convention is based on the year, effort, area name, "Box," and the product type. An example file name is "2011_NCMP_MS_26_BareEarth_1mGrid.tif", where 2011 is the year of data collection, NCMP is the project under which data were collected, MS is the area of data collection, 26 is the "Box" number and "BareEarth_1mGrid" is the product type.

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.

Distribution Information

  • 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.

  • GeoTIFF

    Bulk download of data files in the original coordinate system.

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.

Controlled Theme Keywords

COASTAL ELEVATION, elevation, oceans

Child Items

No Child Items for this record.

Contact Information

Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Extents

Geographic Area 1

-89.150718° W, -88.074518° E, 30.282357° N, 29.760357° S

Time Frame 1
2011-05-31

Louisiana date of collection

Time Frame 2
2011-06-01 - 2011-06-03

Mississippi dates of collection

Time Frame 3
2011-06-02 - 2011-06-04

Alabama dates of collection

Item Identification

Title: 2011 USACE NCMP Topobathy Lidar DEM: Gulf Coast (AL, LA, MS)
Short Name: usace2011_gulf_dem_m9344_metadata
Status: Completed
Creation Date: 2011
Abstract:

These files contain rasterized topographic elevations generated from topographic lidar data classified as ground, and valid bathymetric data. These data were collected by the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system along the coast of Mississippi. CHARTS integrates topographic and bathymetric lidar sensors, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Data coverage generally extends along the coastline from the waterline inland 500 meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry). Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. The 3-D position data are sub-divided into a series of LAS files, each covering approximately 5 kilometers of shoreline. The file index is provided by the shape file, MS_boxes.shp, and the numbers used to identify files are in the "Box" field of the shape file. The LAS file naming convention is based on the year, effort, area name, "Box," and the product type. An example file name is "2011_NCMP_MS_26_BareEarth_1mGrid.tif", where 2011 is the year of data collection, NCMP is the project under which data were collected, MS is the area of data collection, 26 is the "Box" number and "BareEarth_1mGrid" is the product type.

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.

Purpose:

These data were collected as a part of the NCMP to depict the bare earth elevations above water in the Alabama, Louisiana, and Mississippi coastal zone.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
ISO 19115 Topic Category
elevation
ISO 19115 Topic Category
oceans
UNCONTROLLED
None Compact Hydrographic Airborne Rapid Total Survey (CHARTS)
None IWG-OCM
None National Coastal Mapping Program (NCMP)
None U.S. Army Corps of Engineers (USACE)

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALABAMA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MISSISSIPPI
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > SEA FLOOR
UNCONTROLLED
Geographic Names Information System Jackson County
Geographic Names Information System MS
Geographic Names Information System Ocean Springs
Geographic Names Information System United States

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: As Needed
Data Presentation Form: Model (digital)
Distribution Liability:

Although these data have been processed successfully on a computer system at the US Army Corps of Engineers, no warranty expressed or implied is made by the US Army Corps of Engineers regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the US Army Corps of Engineers in the use of these data.

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.

Data Set Credit: U.S. Army Corps of Engineers (USACE), JALBTCX (Joint Airborne Lidar Bathymetry Technical Center of eXpertise)

Support Roles

Data Steward

CC ID: 1110910
Date Effective From: 2021
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

CC ID: 1110909
Date Effective From: 2021
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

CC ID: 1110911
Date Effective From: 2021
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

Point of Contact

CC ID: 1110912
Date Effective From: 2021
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

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1296679
W° Bound: -89.150718
E° Bound: -88.074518
N° Bound: 30.282357
S° Bound: 29.760357

Extent Group 1 / Time Frame 1

CC ID: 1296676
Time Frame Type: Discrete
Start: 2011-05-31
Description:

Louisiana date of collection

Extent Group 1 / Time Frame 2

CC ID: 1296677
Time Frame Type: Range
Start: 2011-06-01
End: 2011-06-03
Description:

Mississippi dates of collection

Extent Group 1 / Time Frame 3

CC ID: 1296678
Time Frame Type: Range
Start: 2011-06-02
End: 2011-06-04
Description:

Alabama dates of collection

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Reference Systems

Reference System 1

CC ID: 1296673

Coordinate Reference System

CRS Type: Geographic 2D
EPSG Code: EPSG:4269
EPSG Name: NAD83
See Full Coordinate Reference System Information

Reference System 2

CC ID: 1296674

Coordinate Reference System

CRS Type: Vertical
EPSG Code: EPSG:5703
EPSG Name: NAVD88 height
See Full Coordinate Reference System Information

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

CC ID: 1110916
Start Date: 2021-12-03
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9433/details/9433
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2021 - Present)
File Name: Customized Download
Description:

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.

File Type (Deprecated): Zip
Compression: Zip

Distribution 2

CC ID: 1110917
Start Date: 2021-12-03
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/USACE_AL_LA_MS_DEM_2011_9433/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2021 - Present)
File Name: Bulk Download
Description:

Bulk download of data files in the original coordinate system.

File Type (Deprecated): GeoTIFF
Distribution Format: GeoTIFF

URLs

URL 1

CC ID: 1110905
URL: https://coast.noaa.gov/
Name: NOAA's Office for Coastal Management (OCM) website
URL Type:
Online Resource
File Resource Format: HTML
Description:

Information on the NOAA Office for Coastal Management (OCM)

URL 2

CC ID: 1110906
URL: https://coast.noaa.gov/dataviewer/
Name: NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
URL Type:
Online Resource
File Resource Format: HTML
Description:

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.

URL 3

CC ID: 1110907
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2610/supplemental/se2011_ncmp_almsla_m2610.kmz
Name: Browse graphic
URL Type:
Browse Graphic
File Resource Format: KML
Description:

This graphic displays the footprint for this lidar data set.

URL 4

CC ID: 1110952
URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2610/details/2610
Name: Custom Point Download
URL Type:
Online Resource
File Resource Format: Zip
Description:

Link to custom download, from the Data Access Viewer (DAV), the lidar point data from which these raster Digital Elevation Model (DEM) data were created.

Technical Environment

Description:

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.3.3600

Data Quality

Horizontal Positional Accuracy:

The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 0.75 m RMSE

Vertical Positional Accuracy:

The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.20 m RMSE

Completeness Report:

This data set covers the spatial extent of topographic lidar data obtained during this survey.

Conceptual Consistency:

Differences between a DEM created from the lidar data representing bare ground and the ground truth data is unbiased and within +/- 20 cm (RMSE) in flat terrain and within +/-30 cm (RMSE) in hilly terrain.

Lineage

Lineage Statement:

The USACE collected, processed, and provided the data to the NOAA Office for Coastal Management (OCM). OCM received the data and processed it to be available for custom download from the Data Access Viewer (DAV) and for bulk download from https.

Sources

USACE JALBTCX

CC ID: 1296668
Contact Role Type: Originator
Contact Type: Organization
Contact Name: USACE JALBTCX

Process Steps

Process Step 1

CC ID: 1296669
Description:

These data were collected using the CHARTS system. It is owned by the Naval Oceanographic Office and operated through contract. The system collects topographic lidar data at 10 kHz, bathymetric lidar data at 1 kHz and RGB imagery at 1Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V 410 equipment. All raw data streams are transferred to the office for downloading and processing in SHOALS GCS software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. Upon inspection and QA/QC in the software packages Fledermaus and PFM_ABE, anomalous data are flagged as invalid. PFM_ABE's charts2las module then converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID03 model and exports topographic and bathymetric data as a series of LAS files, one file per flight line. The format of the file is LAS version 1.2. Data are classified as 0 (valid topographic data), 21 (valid topographic data acquired with the bathymetric sensor), 27 (invalid topographic and bathymetric data), 29 (valid bathymetric data).

Process Date/Time: 2011-11-08 00:00:00

Process Step 2

CC ID: 1296670
Description:

The flightline LAS files are imported into GeoCue V7.0.3.5, which is a geospatial workflow production and management software tool employed by JALBTCX to perform and monitor production of data products. Upon import into GeoCue, the flightline LAS files are divided into a series of boxes, each of which are 1500 meters in length and width. A customized classification macro, built upon the TerraScan V11 module within Microstation V8i, classifies valid topographic data as ground points (2) and unclassified points (1). Upon completion the macro, the classification results undergo quality control and any misclassified points are manually edited. In areas of dense vegetation the bare earth ground points might be incorrectly classified due to the inability of the laser to penetrate the canopy and reach the bare ground. In these areas, JALBTCX defaults to the algorithm’s “ground” surface instead of manually reclassifying those points. The final classification results are comprised of individual lidar points with classifications of ground (2) or unclassified (1). They are partitioned into a series of 5km delivery boxes, one Classified LAS file per box. The format of the file is LAS version 1.2. Data are classified as 1 (valid non-ground topographic data), 2 (valid ground topographic data), 21 (valid topographic data acquired with the bathymetric sensor), 27 (invalid topographic and bathymetric data), 29 (valid bathymetric data).

Process Date/Time: 2011-11-08 00:00:00

Process Step 3

CC ID: 1296671
Description:

Data classified as ground (2) and valid bathymetric data (29) in the las files are converted to a grid by generating a triangulated irregular network (TIN) and then extracting the grid node elevations from the TIN surface. The origin point of the grid is located at a horizontal position whose value is evenly divisible by the 1m grid resolution such that rasters from subsequent surveys have common cell boundaries. JALBTCX uses Quick Terrain Modeler V7.1.5 Beta to perform this operation utilizing the following parameters;” Legacy Triangulation”, and “Tiling Settings Snap to Grid (Expand)." The grid is exported from Quick Terrain Modeler as an ESRI ASCII Z grid file. Utilizing an in-house python script within ESRI ArcMap V10.0, the ASCII Z grid file is converted to a tiff-format raster file whose projection is defined as “The North American Datum of 1983.” The raster is then multiplied against a corresponding 1m Grid mask raster, a mask image produced from JALBTCX’s 1m Grid, in ESRI’s Raster Calculator to remove interpolated areas where data does not exist. Horizontal positions, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 (NAD83). Vertical positions are referenced to the NAD83 ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID03 model is used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88).

Process Date/Time: 2012-04-03 00:00:00

Process Step 4

CC ID: 1296672
Description:

The NOAA Office for Coastal Management (OCM) received GeoTiff format files from USACE JALBTCX for the Gulf Coast project area. The bare earth raster files were at a 1 m grid spacing. The data were in geographic NAD83 coordinates and NAVD88 (Geoid03) elevations in meters. OCM assigned the appropriate EPSG codes (Horiz - 4269, Vert - 5703) and copied the raster files to https for Digital Coast storage and provisioning purposes.

Process Date/Time: 2021-12-03 00:00:00
Process Contact: Office for Coastal Management (OCM)

Related Items

Item Type Relationship Type Title
Data Set (DS) Cross Reference 2011 USACE NCMP Topobathy Lidar: Gulf Coast (AL, LA, MS)

Catalog Details

Catalog Item ID: 65899
GUID: gov.noaa.nmfs.inport:65899
Metadata Record Created By: Rebecca Mataosky
Metadata Record Created: 2021-12-03 16:11+0000
Metadata Record Last Modified By: Kirk Waters
Metadata Record Last Modified: 2024-01-10 19:21+0000
Metadata Record Published: 2024-01-10
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16