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Summary

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Short Citation
OCM Partners, 2024: 2016-2017 NCEM NCDOT USGS Lidar: Phase Four Counties in North Carolina, https://www.fisheries.noaa.gov/inport/item/62362.
Full Citation Examples

Abstract

The data set was collected specific to the 2016 Phase Four project area consisting of 20 North Carolina counties. lidar data for the project and the validation site was collected by a single aerial vendor on ESP team between February 27, 2016 and April 17, 2016 and between December 9, 2016 and February 21 of 2017 using Geiger-mode Avalanche Photodiode (GmAPD) sensors. The aerial vendor on the ESP team was Harris Corporation (Harris).Two GmAPD (Geiger-mode) sensors (serial numbers 002 and 003) were used for the data collection of lidar data at a 0.35 meter nominal post spacing (NPS). The following counties or portions of counties were collected in the February through April, 2016 mobilization: Alleghany, Stokes, Surry, Cleveland, Gaston, Mecklenburg, Cabarrus, Stanly, Union, and Anson. The following counties or portions of counties we collected in the December, 2016 through February, 2017 mobilization: Cleveland, Gaston, Mecklenburg, Cabarrus, Stanly, Wilkes, Yadkin, Forsyth, Alexander, Catawba, Iredell, Davie, Rowan, and Davidson. All data was collected during leaf-off conditions. Ground survey support for the project included the establishment of GPS base stations and the collection of control points used for calibration. All data was delivered in the North Carolina State Plane Coordinate System, with a horizontal datum of NAD83 (2011), vertical datum of NAVD88 (Geoid 12B), in US Survey Feet. Data was delivered tiled to a 2,500 foot by 2,500 foot tiling scheme unless otherwise specified in this product description. All lidar was delivered in LASer (LAS) version 1.4 standard format. All lidar and derivative products for this project met the specifications stipulated in Delivery Order 22, the NC Lidar Standard, and the USGS minimum standards for QL1 lidar data. This project was a joint effort between NC Emergency Management, NC Geodetic Survey, and the NCDOT. The following people served as the main representatives for each stakeholder: NC Emergency Management- Hope Morgan (primary contact) and John Dorman; NC Geodetic Survey- Gary Thompson and Watson Ross; NCDOT- Keith Johnston and Marc Swartz, and the United States Geological Survey (USGS).

This metadata supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the Entwine Point Tiles (EPT) hosted by USGS on Amazon Web Services. At the time of ingest into the DAV (August 2020), that data was missing Lincoln, Cabarrus, and Stanly Counties from the full Phase IV data set. Those counties have been added for DAV processing (January, 2022), but not as EPT.

Distribution Information

  • Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options.

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 BATHYMETRY, COASTAL ELEVATION, elevation, TERRAIN ELEVATION

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

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

Extents

Geographic Area 1

-81.796371° W, -79.846639° E, 36.607426° N, 34.819963° S

Time Frame 1
2016-02-27 - 2017-02-21

Item Identification

Title: 2016-2017 NCEM NCDOT USGS Lidar: Phase Four Counties in North Carolina
Short Name: NCEM_Phase4_ClassifiedPointCloud_m9165.xml
Status: Completed
Publication Date: 2017-10-02
Abstract:

The data set was collected specific to the 2016 Phase Four project area consisting of 20 North Carolina counties. lidar data for the project and the validation site was collected by a single aerial vendor on ESP team between February 27, 2016 and April 17, 2016 and between December 9, 2016 and February 21 of 2017 using Geiger-mode Avalanche Photodiode (GmAPD) sensors. The aerial vendor on the ESP team was Harris Corporation (Harris).Two GmAPD (Geiger-mode) sensors (serial numbers 002 and 003) were used for the data collection of lidar data at a 0.35 meter nominal post spacing (NPS). The following counties or portions of counties were collected in the February through April, 2016 mobilization: Alleghany, Stokes, Surry, Cleveland, Gaston, Mecklenburg, Cabarrus, Stanly, Union, and Anson. The following counties or portions of counties we collected in the December, 2016 through February, 2017 mobilization: Cleveland, Gaston, Mecklenburg, Cabarrus, Stanly, Wilkes, Yadkin, Forsyth, Alexander, Catawba, Iredell, Davie, Rowan, and Davidson. All data was collected during leaf-off conditions. Ground survey support for the project included the establishment of GPS base stations and the collection of control points used for calibration. All data was delivered in the North Carolina State Plane Coordinate System, with a horizontal datum of NAD83 (2011), vertical datum of NAVD88 (Geoid 12B), in US Survey Feet. Data was delivered tiled to a 2,500 foot by 2,500 foot tiling scheme unless otherwise specified in this product description. All lidar was delivered in LASer (LAS) version 1.4 standard format. All lidar and derivative products for this project met the specifications stipulated in Delivery Order 22, the NC Lidar Standard, and the USGS minimum standards for QL1 lidar data. This project was a joint effort between NC Emergency Management, NC Geodetic Survey, and the NCDOT. The following people served as the main representatives for each stakeholder: NC Emergency Management- Hope Morgan (primary contact) and John Dorman; NC Geodetic Survey- Gary Thompson and Watson Ross; NCDOT- Keith Johnston and Marc Swartz, and the United States Geological Survey (USGS).

This metadata supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the Entwine Point Tiles (EPT) hosted by USGS on Amazon Web Services. At the time of ingest into the DAV (August 2020), that data was missing Lincoln, Cabarrus, and Stanly Counties from the full Phase IV data set. Those counties have been added for DAV processing (January, 2022), but not as EPT.

Purpose:

The purpose of this project was to update existing lidar data, originally collected between 2000 and 2005, with more accurate and clearly defined lidar data utilizing the latest in sensor technology. Although created for the North Carolina Floodplain Mapping Program for specific use in the engineering aspects of floodplain delineation, the data were also developed to address the elevation data requirements of the broader geospatial community. The North Carolina Floodplain Mapping Program was established in response to the extensive damage caused by Hurrican Floyd in 1999.

Supplemental Information:

NCEM GTM Contract No. 286-000030 ESP CONTRACTOR: ESP Associates SUBCONTRACTORS: Harris Corporation, Surdex Corporation. Lidar data were acquired and calibrated by Harris Corporation. All follow-on processing was completed by the prime contractor and Surdex Corporation.

The following are the USGS lidar fields in JSON:

{

"ldrinfo" : {

"ldrspec" : "North Carolina Emergency Management Hybrid Specifications 2016",

"ldrsens" : "IntelliEarth GmAPD lidar",

"ldrmaxnr" : "1",

"ldrnps" : "0.35",

"ldranps" : "8",

"ldrdens" : "8",

"ldradens" : "8",

"ldrfltht" : "5182",

"ldrfltsp" : "220",

"ldrscana" : "15",

"ldrscanr" : "16",

"ldrpulsr" : "50",

"ldrpulsd" : "0.5",

"ldrpulsw" : "0.15",

"ldrwavel" : "1064",

"ldrmpia" : "0",

"ldrbmdiv" : "0.035",

"ldrswatw" : "2390",

"ldrswato" : "55",

"ldrcrs" : "NAD_1983_2011_StatePlane_North_Carolina_FIPS_3200_Feet",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12B"

},

"ldraccur" : {

"ldrchacc" : "0.30",

"rawnva" : "0.142",

"rawnvan" : "1634",

"clsnva" : "0.142",

"clsnvan" : "1634"

},

"lasinfo" : {

"lasver" : "1.4",

"lasprf" : "6",

"laswheld" : "Withheld (ignore) points were identified in these files using the standard LAS Withheld bit.",

"lasolap" : "Standard LAS overlap bit not used due to 55 percent overlap project design",

"lasintr" : "5",

"lasclass" : {

"clascode" : "1",

"clasitem" : "Processed, but Unclassified"

},

"lasclass" : {

"clascode" : "2",

"clasitem" : "Bare Earth Ground"

},

"lasclass" : {

"clascode" : "3",

"clasitem" : "Low Vegetation 0.5 to 3 feet"

},

"lasclass" : {

"clascode" : "4",

"clasitem" : "Medium Vegetation 3 to 10 feet"

},

"lasclass" : {

"clascode" : "5",

"clasitem" : "High Vegetation 10 to 220 ft"

},

"lasclass" : {

"clascode" : "6",

"clasitem" : "Building 800 square feet or larger, automated filter"

},

"lasclass" : {

"clascode" : "7",

"clasitem" : "Noise, Low"

},

"lasclass" : {

"clascode" : "9",

"clasitem" : "Water"

},

"lasclass" : {

"clascode" : "10",

"clasitem" : "Breakline Proximity"

},

"lasclass" : {

"clascode" : "11",

"clasitem" : "Noise, High"

},

"lasclass" : {

"clascode" : "13",

"clasitem" : "Roads, NCDOT assets"

},

"lasclass" : {

"clascode" : "14",

"clasitem" : "Bridges, NCDOT assets"

}

}}

Keywords

Theme Keywords

Thesaurus Keyword
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 > COASTAL BATHYMETRY
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
ISO 19115 Topic Category
elevation
UNCONTROLLED
None beach
None erosion
None Geiger
None Hydrology

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > SEA FLOOR

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 Office for Coastal Management or its partners

Data Set Credit: The ESP Team, consisting of ESP Associates, Surdex Corporation, and Harris Corporation, performed all data collection, ground support, and data processing for this project., Hope Morgan, NC Emergency Management, GIS Manager - GTM

Support Roles

Data Steward

CC ID: 975315
Date Effective From: 2020
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: 975314
Date Effective From: 2020
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: 975316
Date Effective From: 2020
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: 975317
Date Effective From: 2020
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: 1144978
W° Bound: -81.796371
E° Bound: -79.846639
N° Bound: 36.607426
S° Bound: 34.819963

Extent Group 1 / Time Frame 1

CC ID: 1144977
Time Frame Type: Range
Start: 2016-02-27
End: 2017-02-21

Spatial Information

Spatial Resolution

Horizontal Distance: 0.35 Meter

Spatial Representation

Representations Used

Grid: No
Vector: Yes
Text / Table: No
TIN: No
Stereo Model: No
Video: No

Vector Representation 1

CC ID: 975293
Point Object Present?: Yes
Point Object Count: 723521949021

Reference Systems

Reference System 1

CC ID: 1144974

Coordinate Reference System

CRS Type: Projected
EPSG Code: EPSG:3857
EPSG Name: WGS 84 / Pseudo-Mercator
See Full Coordinate Reference System Information

Reference System 2

CC ID: 1144975

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 or 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: 975321
Start Date: 2020-07-30
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9165/details/9165
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options.

File Type (Deprecated): Zip
Compression: Zip

URLs

URL 1

CC ID: 975295
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 2

CC ID: 975296
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/NCphase4_2016_9165.kmz
Name: Browse graphic
URL Type:
Browse Graphic
File Resource Format: KML
Description:

This graphic displays the footprint for this lidar data set.

URL 3

CC ID: 975297
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/DO22_Phase%204_Technical%20Proposal.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 4

CC ID: 975298
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/alexander_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 5

CC ID: 975299
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/alleghany_las_updated_jun2018.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 6

CC ID: 975300
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/cabarrus_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 7

CC ID: 975301
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/catawba_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 8

CC ID: 975302
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/cleveland_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 9

CC ID: 975303
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/davie_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 10

CC ID: 975304
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/do22_nc_lidar_post_acquisition_report_final.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 11

CC ID: 975305
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/gaston_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 12

CC ID: 975306
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/iredell_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 13

CC ID: 975307
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/lincoln_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 14

CC ID: 975308
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/stanly_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 15

CC ID: 975309
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/stokes_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 16

CC ID: 975310
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/surry_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 17

CC ID: 975311
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/wilkes_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 18

CC ID: 975312
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9165/supplemental/yadkin_las.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

Technical Environment

Description:

MicroStation Connect Version 10; TerraScan Version 17; ESRI ArcGIS 10.4.1, Windows 7 Operating System, ESP Analyst, ESP Utilities

Data Quality

Vertical Positional Accuracy:

The project specifications require that Non-Vegetated Vertical Accuracy (NVA) and Vegetated Vertical Accuracy (VVA) be computed for calibrated and classified lidar point cloud files. The required accuracy (ACCz) is: 18.13 cm at a 95% confidence level for NVA, derived according to NSSDA, i.e., based on RMSE (z) of 9.25 cm in the bare earth? and "urban" land cover classes. The NVA was tested with 1634 checkpoints located in bare earth and urban (non-vegetated) areas. These check points were not used in the calibration or post processing of the lidar point cloud data. The checkpoints were distributed throughout the project area and were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the classified 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 points. AccuracyZ has been tested to meet 18.13 cm or better Non-Vegetated Vertical Accuracy at 95% 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)/ASRPS Guidelines.Quantitative value: 0.142, Test that produced the value: Tested 0.142 meters NVA at a 95% confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA). The NVA of the classified lidar point cloud files was calculated against TINs derived from the final calibrated and controlled data using 1634 independent NVA checkpoints.

Completeness Report:

These LAS data files include all data points collected. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist. The point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications.

Conceptual Consistency:

ESP Assocites tested the classified LAS files for both vertical and horizontal accuracy. All data covers the project area, tile to tile with no gaps or no data areas exceeding specifications

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

Lineage Statement:

North Carolina Phase 4 lidar was ingested into the Data Access Viewer for custom product generation by leveraging USGS hosted Entwine Point Tiles and obtaining three counties missing from EPT in LAZ format.

Sources

Entwine Point Tiles on AWS

CC ID: 1144967
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://usgs.entwine.io
Citation URL Name: USGS entwine point clouds

LAS point cloud on AWS

CC ID: 1144968
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS

USGS Point Cloud

CC ID: 1144969
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/
Citation URL Name: USGS Lidar Point Cloud Projects
Citation URL Description:

Directory of lidar point clouds from USGS

Source Contribution:

Three counties of data were copied from here to complete the phase 4 project area.

Process Steps

Process Step 1

CC ID: 1144970
Description:

LAS Point Classification: The point classification is performed as described below. The bare earth surface is then manually reviewed and edited using TIN visualization and profiles to ensure correct classification on the Class 2 (Ground) points as well as the other classifications required by NCEM. After the bare-earth surface is finalized, it is then used to generate all hydro-breaklines through heads-up digitization in a 3D environment for all rivers equal to or larger than 100 feet in width and all closed water bodies equal to or greater than 2 acres. Island equal or greater than 1 acre are mapped are included. All ground (Class 2) lidar data inside of the Lake Pond and Double Line Drain hydro flattening breaklines were classified to water (Class 9) using ESP Utilities. A buffer of 1 foot was also used around each hydro-flattened feature to classify ground (Class 2) points within the buffer to breakline proximity (Class 10). All Lake Pond Island and Double Line Drain Island features were reviewed in ESP Analyst and checked to ensure that the ground (Class 2) points were reclassified to the correct classification after the automated classification was completed. Overlap data was not processed as Geiger mode lidar is flown at a 55 percent overlap with a Palmer scanner. Road polygons derived from heads-up digitization from aerial imagery and the lidar were derived for only state-maintained roads per the latest available road database from the North Carolina Department of Transportation. These polygons were then used to classify all ground points with the road edges to roads (Class 13). All remaining classifications required by NCEM such as buildings (Class 6) and vegetation strata (Classes 3, 4, and 5) were derived using automated filters in Terrascan then checked for gross errors and review to ensure that a 98 percent confidence level in classification was met. All data was manually reviewed and any remaining artifacts in the ground (Class 2) removed using functionality provided by ESP Analyst. ESP Analyst was used as a final check of the bare earth dataset. ESP Utilities was then used to create the deliverable industry-standard LAS files for both the All Point Cloud Data. ESP Utilities was used to verify full LAS header and projection information.

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

Process Step 2

CC ID: 1144971
Description:

Original point clouds in LAS/LAZ format were restructured as Entwine Point Tiles and stored on Amazon Web Services. The data were reprojected horizontally to WGS84 Web Mercator (EPSG 3857). Vertically the data was converted to meters and no changes were made to the vertical datum (NAVD88 GEOID12B; EPSG 5703).

Process Date/Time: 2019-01-01 00:00:00
Process Contact: U.S. Geological Survey
Source: LAS point cloud on AWS

Process Step 3

CC ID: 1144972
Description:

References to the entwine point tiles and data reports were ingested into the Digital Coast Data Access Viewer. No changes to the data were made at this point. The Data Access Viewer will access the point cloud as it resides on AWS under the usgs-lidar-public container.

Process Date/Time: 2020-07-30 00:00:00
Process Contact: Waters, Kirk
Email Address: kirk.waters@noaa.gov
Source: Entwine Point Tiles on AWS

Process Step 4

CC ID: 1144973
Description:

The three counties missing from the USGS EPT holdings were downloaded from the USGS RockyWeb holdings. These were converted to geographic coordinates (NAD83 2011) and vertical meters. The vertical datum was left as NAVD88 Geoid12B to match the USGS EPT holdings. This allows the Data Access Viewer to combine them.

Process Date/Time: 2022-01-19 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov
Source: USGS Point Cloud

Catalog Details

Catalog Item ID: 62362
GUID: gov.noaa.nmfs.inport:62362
Metadata Record Created By: Kirk Waters
Metadata Record Created: 2020-07-30 14:51+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-08-15 17:09+0000
Metadata Record Published: 2022-03-16
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