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Short Citation:
OCM Partners, 2023: North Carolina Statewide Lidar DEM 2014 Phase 1, https://www.fisheries.noaa.gov/inport/item/49411.

Item Identification

Title: North Carolina Statewide Lidar DEM 2014 Phase 1
Short Name: NorthCarolina_2014_DEM_Phase1_metadata_m5005
Status: Completed
Publication Date: 2016-07-14
Abstract:

Geographic Extent: North Carolina Area of Interest for Sandy, covering approximately 9,396 square miles.

Dataset Description: The North Carolina - Sandy LiDAR project called for the Planning, Acquisition, processing and derivative products of LIDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1. The data was developed based on a horizontal projection/datum of North Carolina State Plane Coordinate System, NAD83, survey feet and vertical datum of NAVD1988 (GEOID12A), survey feet (later changed to vertical meters). LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.3 Files formatted to 12138 individual 5000ft x 5000ft tiles, and corresponding Intensity Images and Bare Earth DEMs tiled to the same 5000ft x 5000ft schema, and Breaklines in ESRI File-Geodatabase format.

Ground Conditions: LiDAR was collected in Spring 2014, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications, Photo Science established a total of 282 QA control points and 161 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the North Carolina - Sandy project area.

Data was collected under USGS Contract: G10PC00026 Task Order Number: G14PD00182 and originally had a title of "Lidar data for North Carolina - SANDY 2014". The title was modified to avoid conflict with other phases of the North Carolina collection conducted by the North Carolina Floodplain Mapping Program (NCFMP). This data was funded jointly by USGS and NCFMP.

Original contact information:

Contact Name: Michael Shillenn

Contact Org: Photo Science, Inc., Data Acquisition Department

Phone: 859-277-8700

Email: mshillenn@photoscience.com

Purpose:

Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Intensity Images, Breaklines and Raster DEM.

The purpose of these lidar data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 5 feet cell size.

These raw lidar point cloud data were used to create classified lidar LAS files, intensity images, 3D breaklines, hydro-flattened DEMs as necessary.

Notes:

12107

Supplemental Information:

USGS Contract No. G10PC00026

CONTRACTOR: Photo Science, Inc

Ground Control Points were acquired and calibrated by Photo Science, Inc.

All Lidar data acquisition, calibration, and follow-on processing were completed by the prime contractor.

Please note the lrdinfo section has been repeated twice for the two different specifications used to acquire the data. This lidar section has been commented out in xml because the standard metadata schema does not include it.

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 > COASTAL PROCESSES > COASTAL ELEVATION
UNCONTROLLED
ISO 19115 Topic Category elevation
None Elevation data
None Hydrology
None LAS Point Cloud
None Lidar
None model
None remote sensing

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NORTH CAROLINA
UNCONTROLLED
None Beaufort County
None Bertie County
None Camden County
None Carteret County
None Chowan County
None Craven County
None Currituck County
None Dare County
None Gates County
None Hertford County
None Hyde County
None Jones County
None Martin County
None North Carolina
None Onslow County
None Pamlico County
None Pasquotank County
None Perquimans County
None Pitt County
None Tyrell County
None Washington County

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: Image (digital)
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of Photo Science, USGS, NOAA, NCFMP, the Office for Coastal Management or its partners.

Data Set Credit: Photo Science, Inc. flew the LiDAR and processed the data.

Support Roles

Data Steward

CC ID: 661097
Date Effective From: 2016-07-14
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: 661099
Date Effective From: 2016-07-14
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: 661100
Date Effective From: 2016-07-14
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: 661098
Date Effective From: 2016-07-14
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: 661103
W° Bound: -77.73114063336
E° Bound: -75.44808990254
N° Bound: 36.57015738581
S° Bound: 34.42740059438

Extent Group 1 / Time Frame 1

CC ID: 661102
Time Frame Type: Range
Start: 2014-01-26
End: 2014-04-06

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=5005

;

Data Access Constraints:

No restrictions apply to these data.

Data Use Constraints:

None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no Longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of it's limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data. Acknowledgment of the NOAA Digital Coast for data distribution would also be appreciated.

Metadata Access Constraints:

None.

Metadata Use Constraints:

None.

Distribution Information

Distribution 1

CC ID: 720738
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5005
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: 720739
Download URL: https://coast.noaa.gov/htdata/raster2/elevation/NorthCarolina_DEM_2014P1_5005
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 720741
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 720742
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 661136
Activity Date/Time: 2016-08-03
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 661135
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: 718136
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 720740
Activity Date/Time: 2018-02-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

MicroStation Version 8; TerraScan Version 13; TerraModeler Version 13; GeoCue Version 2012.1.27.7; ESRI ArcGIS 10.1; Global Mapper 13; ALS Post Processor 2.75 Build #25; Windows 7 Operating System \\psihq_nx3200\Projects\7505_089_NorthCarolina_2014LIDAR\ 2.2 TB and \\Matrix\LIDAR\7505-089_NC_LiDAR_2014 15.8 TB

Data Quality

Vertical Positional Accuracy:

The specifications require that only Fundamental Vertical Accuracy (FVA) be computed for raw lidar point cloud swath files.

The vertical accuracy value is the AccuracyZ at 95 percent Confidence Interval in feet. The FVA was tested using 282 independent survey located in open terrain. The survey checkpoints were distributed throughout the project area. The 282 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines.

; Quantitative Value: 0.118 meters, Test that produced the value:

The FVA AccuracyZ in meters. The FVA was tested using 282 independent survey located in open terrain. The survey checkpoints were distributed throughout the project area. The 282 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control. The RMSE was computed to be 0.197 feet. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines.

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 passes Fundamental Vertical Accuracy specifications.

Conceptual Consistency:

Classified LAS files were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas.

Lineage

Sources

Lidar RAW Data for North Carolina - SANDY 2014

CC ID: 661087
Contact Name: Photo Science, Inc.
Publish Date: 2014-05-16
Extent Type: Range
Extent Start Date/Time: 2014-01-26
Extent End Date/Time: 2014-04-06
Source Contribution:

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

Survey Report of LiDAR Ground Control Points: North Carolina - SANDY 2014 LiDAR

CC ID: 661085
Contact Name: Photo Science, Inc.
Publish Date: 2014-05-16
Extent Type: Discrete
Extent Start Date/Time: 2014
Source Contribution:

This data source was used (along with the airborne GPS/IMU Data) to aid in the georeferencing of the lidar point cloud data.

| Source Geospatial Form: vector digital data and tabular data | Type of Source Media: CD-ROM

Survey Report of LiDAR Quality Control Points: North Carolina - SANDY 2014 LiDAR

CC ID: 661086
Contact Name: Photo Science, Inc.
Publish Date: 2014-05-16
Extent Type: Discrete
Extent Start Date/Time: 2014
Scale Denominator: 50
Source Contribution:

This data source was used (along with the lidar intensity imagery) to QC and vertically adjust the lidar point cloud data. | Source Geospatial Form: vector digital data and tabular data | Type of Source Media: online

Process Steps

Process Step 1

CC ID: 661088
Description:

Hydro Flattened Raster DEM Process:

Class 2 LiDAR in conjunction with the hydro breaklines were used to create a 5 foot Raster DEM. Using automated scripting routines within ArcMap, an ERDAS Imagine IMG file was created for each tile. Each surface is reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface.

Class 2 LiDAR in conjunction with the hydro breaklines were used to create a 5 foot hydro-flattened Raster DEM. Using automated scripting routines within ArcMap, an ERDAS Imagine IMG file was created for each tile. Each surface is reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface.

Process Date/Time: 2014-01-01 00:00:00
Source: Survey Report of LiDAR Ground Control Points: North Carolina - SANDY 2014 LiDAR

Process Step 2

CC ID: 661089
Description:

Ingestion into NOAA Digital Coast Data Access Viewer:

Data were received from the North Carolina Flood Plain Mapping Program as a 5 foot Raster DEM in Imagine format. Imagine files were inconsistent in their georeferencing. They were reset to be projected coordinate system EPSG:6543 (North Carolina State Plane NAD83(2011)) using gdal_translate. The vertical units are feet.

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

Related Items

Item Type Relationship Type Title
Data Set (DS) Part of a Seamless Database North Carolina Statewide Lidar DEM 2014 Phase 2

Phase 2 of statewide coverage.

Catalog Details

Catalog Item ID: 49411
GUID: gov.noaa.nmfs.inport:49411
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: 2018-02-13
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-02-13
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-02-13