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Short Citation:
OCM Partners, 2023: 2016 USACE Post-Matthew Topobathy Lidar DEM: Southeast Coast (VA, NC, SC, GA and FL), https://www.fisheries.noaa.gov/inport/item/49409.

Item Identification

Title: 2016 USACE Post-Matthew Topobathy Lidar DEM: Southeast Coast (VA, NC, SC, GA and FL)
Short Name: 2016_PostMatthew_1mGrid_csdgm_m6234_metadata
Status: Completed
Publication Date: 2017-02-15
Abstract:

These files contain rasterized topobathy lidar elevations generated from data collected by the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with simultaneous topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. 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. Horizontal positions, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 National Adjustment of 2011 (NAD83 (2011)). Vertical positions are referenced to the NAD83 (2011) ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID12B model is used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). The 3-D position data are sub-divided into a series of LAS files, which are tiled into 1-km by 1-km boxes defined by the Military Grid Reference System. The LAS file index is provided by the shape files, "MGRS_1km_17R.shp ", and the numbers used to identify files are in the "Box" field of the shape file. The data file naming convention is based on the year, effort, area name, "Box" number and data product type. An example file name is "2016_PostMatthew_FL_17RMN8758_1mGrid.tif", where 2016 is the year of data collection, PostMatthew is the effort under which data were collected, FL is the area of data collection, 17RMN8758 is the "Box" number and 1mGrid is the data product type.

Purpose:

This data was collected as part of USACE Post-Hurricane Matthew emergency response efforts to assess elevations above and below water along the coasts of Virginia, North Carolina, South Carolina, Georgia and Florida.

Notes:

12071

Supplemental Information:

None.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT > LAND MANAGEMENT > LAND USE CLASSES
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL PROCESSES
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
UNCONTROLLED
ISO 19115 Topic Category elevation
ISO 19115 Topic Category imageryBaseMapsEarthCover
ISO 19115 Topic Category oceans
None Bathymetry
None Coastal Zone Mapping Imaging Lidar (CZMIL)
None Digital Surface Model (DSM)
None Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX)
None Mobile District
None Post-Matthew
None Topography
None U.S. Army Corps of Engineers (USACE)

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None Georgia
None South Carolina
None Virginia

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: Lidar DEM
Distribution Liability:

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

Data Set Credit: USACE Mobile District flew and processed the data

Support Roles

Data Steward

CC ID: 661017
Date Effective From: 2017-02-15
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: 661019
Date Effective From: 2017-02-15
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: 661020
Date Effective From: 2017-02-15
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: 661018
Date Effective From: 2017-02-15
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: 661023
W° Bound: -81.47518
E° Bound: -75.22983
N° Bound: 38.04567
S° Bound: 25.64987

Extent Group 1 / Time Frame 1

CC ID: 661022
Time Frame Type: Range
Start: 2016-10
End: 2016-12

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6234.

The lidar point cloud source data can be obtained on-line at:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5184.

;

Data Access Constraints:

No restrictions apply to these data.

Data Use Constraints:

These data depict the heights at the time of the survey and are only accurate for that time. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the U.S. Army Corps of Engineers, Mobile District Office, Spatial Data Branch be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The Spatial Data Branch does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form. Acknowledgement of the USACE Mobile District would be appreciated for products derived from these data.

Distribution Information

Distribution 1

CC ID: 720726
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6234
Distributor:
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 720727
Download URL: https://coast.noaa.gov/htdata/raster2/elevation/USACE_post_matthew_DEM_2016_6234
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 720729
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 720730
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 720731
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5184/supplemental/2016_USACE_post_matthew.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar footprint for the 2016 post-Matthew topobathy lidar project on the east coast.

Activity Log

Activity Log 1

CC ID: 661046
Activity Date/Time: 2017-02-13
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 661045
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718090
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 720728
Activity Date/Time: 2018-02-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

None reported; Quantitative Value: 1 meters, Test that produced the value: CZMIL topographic data - Compiled to meet 1 m horizontal accuracy at 95% confidence level. CZMIL bathymetric data - Compiled to meet 3.5 + 0.05d m horizontal accuracy at 95% confidence level, d is depth.

Vertical Positional Accuracy:

None reported; Quantitative Value: 0.196 meters, Test that produced the value: CZMIL topographic data - Compiled to meet 19.6 cm vertical accuracy at 95% confidence level. CZMIL bathymetric shallow FOV data - Compiled to meet SQRT((0.25^2) +((0.0075d)^2)) m vertical accuracy at 95% confidence level, d is depth. CZMIL bathymetric deep FOV data - Compiled to meet SQRT((0.30^2) +((0.013d)^2)) m vertical accuracy at 95% confidence level, d is depth.

Completeness Report:

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

Conceptual Consistency:

During inspection and QC of the lidar point cloud, flightline to flightline elevation differences met the CZMIL sensor specifications.

Lineage

Sources

Lidar RAW Data for post-Matthew 2016

CC ID: 661005
Contact Name: JALBTCX
Publish Date: 2016-01-01
Extent Type: Range
Extent Start Date/Time: 2016-10
Extent End Date/Time: 2016-12
Source Contribution:

This data source was used to populate the lidar point cloud data. | Source Geospatial Form: lidar data | Type of Source Media: online

Process Steps

Process Step 1

CC ID: 661006
Description:

These data were collected using the CZMIL system. It is owned and operated by the U.S. Army Corps of Engineers (USACE). The system collects topobathy lidar data at 10 kHz and RGB imagery at 2 Hz. 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 610 equipment. All raw data streams are transferred to the office for downloading and processing in CZMIL's HydroFusion 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 and have the withheld bit set. PFM_ABE software then converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID12B model and exports valid lidar data as a series of unclassified LAS files.

Process Date/Time: 2016-01-01 00:00:00

Process Step 2

CC ID: 661007
Description:

LAS files are imported into TerraScan V13 module within Microstation V8i, classifies valid topobathy data as ground points (2) and unclassified points (1), and valid bathymetric points (29). 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. They are partitioned into a series of 1-km 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), and 29 (valid bathymetric data).

Process Date/Time: 2016-01-01 00:00:00

Process Step 3

CC ID: 661008
Description:

Data classified as unclassified points (1), ground points (2), and bathymetric points (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 V8 to perform this operation utilizing the following parameters; "Adaptive Triangulation, Max Z", "Max Sample Excursion - 5", "Max Triangle Side - 10", 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 V10.2, the ASCII Z grid file is converted to a tif-format raster file whose projection is defined as "The North American Datum of 1983 (2011)."

Process Date/Time: 2016-01-01 00:00:00

Process Step 4

CC ID: 661009
Description:

Data were received by the NOAA Office for Coastal Management from the USACE Mobile District in the form described above. It was ingested into the Digital Coast Data Access Viewer system for distribution without any conversion.

Process Date/Time: 2017-01-01 00:00:00

Catalog Details

Catalog Item ID: 49409
GUID: gov.noaa.nmfs.inport:49409
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:13+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2020-12-10
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2020-12-10
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2021-12-10