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Short Citation:
OCM Partners, 2022: 2005 NCFMP Lidar: NC Statewide Phase 3, https://www.fisheries.noaa.gov/inport/item/49833.

Item Identification

Title: 2005 NCFMP Lidar: NC Statewide Phase 3
Short Name: nc2005_phase3_m5011_metadata
Status: Completed
Publication Date: 2016-03-11
Abstract:

Airborne LIDAR terrain mapping data acquired March through April 2005. These data sets may represent a single geographic tile of a larger, county/sub-county data set. As such, the map extent indicated in the Spatial_Domain element is representative of the larger data set and not an individual tile. The data sets are organized in 10,000 ft x 10,000 ft tiles using the NC Bureau of Land Records Management (LRMP) standards. Specific information about individual data tiles is included in the data delivery index. More information about this can be obtained at www.ncfloodmaps.com.

The native EBN full return flight lines were converted to LAS format (version 1.1) by the North Carolina Floodplain Mapping Program in May 2009. All other citation information remains unchanged.

Original contact information:

Contact Org: NC Floodplain Mapping Program

Phone: 919-715-0408

Email: hmorgan@ncem.org

Purpose:

These data sets were collected and derived by the North Carolina Floodplain Mapping Program (www.ncfloodmaps.com) as part of its effort to modernize FEMA Flood Insurance Rate Maps (FIRM) statewide.

Although created for specific use in the engineering aspects of floodplain delineation, the data sets were also developed to address the elevation data requirements of the broader geospatial data user community. The North Carolina Floodplain Mapping Program was established in

response to the extensive damage caused by Hurricane Floyd in 1999.

Notes:

10477

Supplemental Information:

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5011/supplemental/nc2005_ncfmp_phase3_m5011.kmz

A report of this data is available at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5011/supplemental/nc2005_ncfmp_phase3_m5011_qualityreport.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None Contour
None ESRI
None Flood
None Floodplain
None Shapefile

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
Entity Attribute Overview:

Files in LAZ format (1,2,6,9)

Entity Attribute Detail Citation:

none

Distribution Liability:

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

Support Roles

Data Steward

CC ID: 679439
Date Effective From: 2016-03-11
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: 679441
Date Effective From: 2016-03-11
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: 679442
Date Effective From: 2016-03-11
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: 679440
Date Effective From: 2016-03-11
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: 1137666
W° Bound: -84.326938
E° Bound: -81.317547
N° Bound: 36.163361
S° Bound: 34.983009

Extent Group 1 / Time Frame 1

CC ID: 1137665
Time Frame Type: Range
Start: 2005-01-03
End: 2005-03-23

Spatial Information

Spatial Representation

Representations Used

Vector: 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=5011

;

Data Access Constraints:

None

Data Use Constraints:

Users should be aware that temporal changes may have occurred since this data set was collected and that 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.

These data sets were created with the highest consideration of accuracy and data integrity. However, as with all other geospatial data sets, users must take into consideration the consequences of using the data for specific applications, business processes, decisions, and map display. For example, surface conditions may have changed in some areas since the initial data was captured. A full metadata record is provided to help the user understand the date, map scale and accuracy standard applied in the collection and data development process. The data should not be used without full review and comprehension of the metadata. acknowledgement of the North Carolina Floodplain Mapping Program is appreciated when using the data set. Data further derived from this data set should be fully documented using the federal metadata standard and listed via the NC Geospatial Data Clearinghouse.

Distribution Information

Distribution 1

CC ID: 741605
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5011
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: 741606
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5011/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741608
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741609
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 741610
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5011/supplemental/nc2005_ncfmp_phase3_m5011.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the North Carolina Statewide Lidar Phase 3 collection.

Activity Log

Activity Log 1

CC ID: 679590
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 679589
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC Content Standards 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: 718406
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741607
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

LIDAR full returns were compared with NCGS QA/QC checkpoints using only single and final returns per pulse. A vertical bias was acquired after airport calibration based on this comparison. For the NC Floodplain Mapping Program, the vertical accuracy for coastal counties is less than or equal to 20 cm RMSE. For mainland counties, the vertical accuracy of the elevation data is less than or equal to 25 cm RMSE. More information about the Quality Control reports and a summary of the quality control checks for each county in the Broad River Basin is available through the NCFMP. | Quantitative Value: <=20 | Quantitative Test Explanation: RMSE (cm) of bare earth LIDAR points compared with independent checkpoints

Horizontal Positional Accuracy:

LIDAR full return mass points were compared with surveyed elevations provided by independent contractors to the NCGS.

More information about the Quality Control reports is available through NCFMP.

Numerous internal quality assurance/quality control steps taken to ensure the quality of the LIDAR terrain data to meet the bare earth requirements and RMSE accuracy standards in the NC Floodplain Mapping Program.

Step 1. Preprocessing

Step 2. Post-Automated Editing QC (Data Evaluation)

Step 3. QC Check of Tiles

Step 4. Manual Editing (Hillshade Checks / Peer Review)

Step 5. QC and Tile Edge Matching

Step 6. Final EarthData QC

Step 7. Comparisons of Independent Field Survey Data with LIDAR Data; Quantitative Value: 2 meters, Test that produced the value: RMSE (m) of bare earth LIDAR points compared with independent checkpoints

Vertical Positional Accuracy:

LIDAR full return mass points were compared with surveyed elevations provided by independent contractors to the NCGS. A vertical bias was acquired after airport calibration based on this comparison.

For the NC Floodplain Mapping Program, the vertical accuracy for coastal counties is less than or equal to 20 cm RMSE. For mainland counties, the vertical accuracy of the elevation data is less than or equal to 25 cm RMSE. More information about the Quality Control reports and a summary of the quality control checks for each county in the Broad River Basin can be found through NCFMP.

Numerous internal quality assurance/quality control steps were taken to ensure the quality of the LIDAR terrain data to meet the bare earth requirements and RMSE accuracy standards in the NC Floodplain Mapping Program.

Step 1. Preprocessing

Step 2. Post-Automated Editing QC (Data Evaluation)

Step 3. QC Check of Tiles

Step 4. Manual Editing (Hillshade Checks / Peer Review)

Step 5. QC and Tile Edge Matching

Step 6. Final EarthData QC

Step 7. Comparisons of Independent Field Survey Data with LIDAR Data; Quantitative Value: 0.20 meters, Test that produced the value: RMSE (m) of bare earth LIDAR points compared with independent checkpoints

Completeness Report:

The full return mass points contain voids where insufficient

energy was reflected from the surface to generate a

valid return from the terrain. Voids in the full return mass points

tend to occur in water bodies. Wet sand and certain types of

vegetation can also cause voids or anomalous elevations.

Conceptual Consistency:

Data was vertically adjusted based on RMSE and mean difference from control report

Lineage

Process Steps

Process Step 1

CC ID: 1137659
Description:

All data collection flights were initialized and finalized during periods of GPS Position Dilution of Precision greater than 4. GPS data quality was evaluated post-flight to ensure sufficient quality for LIDAR data requirements and integration. GPS base maximum allowable distance between stations was established such that no more than a 50 mile radius occurred between occupations. Swath width of terrain covered in a single flightline at an altitude of 10,000 feet AMT was approximately 3,173 meters. Field of View for the Leica GeoSystems Aeroscan system used was 55 degrees project wide, or approximately 27.5 degrees from nadir with a maximum of 5 returns collected for each pulse. Nominal post spacing for finalized Bare Earth product was 2 meters. An average of 10-20 rapid static GPS survey collected ground control points were established per base airport project wide to detect and correct horizontal and vertical bias. Typically, 3 or more flightlines of LIDAR returns were collected for each airport lift, one of which being bi-directional for use in optimizing instrument boresight angles to account for aircraft pitch, yaw and roll. All post process collection quality assurance is achieved aided by airport cross and bi-directional flightlines, entire lift cross flightlines, and the use of surveyed ground control points.

Process Date/Time: 2003-12-22 00:00:00

Process Step 2

CC ID: 1137660
Description:

Checking for coverage and anomalies

Airport calibration

Production flightline calibration

Removal of blunders

Process Date/Time: 2003-12-22 00:00:00

Process Step 3

CC ID: 1137661
Description:

Tiling, Automated filtering for point classification, Manual editing to classify points, Quality control

Process Date/Time: 2003-12-22 00:00:00

Process Step 4

CC ID: 1137662
Description:

The methods used to develop these data for the North Carolina Floodplain Mapping Program are documented in LIDAR Bare Earth Mass Points and Breaklines Technical

Document, available online at www.ncfloodmaps.com.

Process Date/Time: 2006-04-26 00:00:00

Process Step 5

CC ID: 1137663
Description:

The lidar point data were received by the NOAA Office for Coastal Management via ftp from NCFMP. The data were LAS format, horizontal datum NAD83 (1995) North Carolina State Plane (3200) feet, vertical datum NAVD88 US Survey Feet and contained elevation, intensity measurements and classifications. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The data were converted from State Plane coordinates to geographic coordinates in decimal degrees.

2. The data were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid03.

3. Outliers and Class 7 (noise) were removed.

Process Date/Time: 2016-02-26 00:00:00

Catalog Details

Catalog Item ID: 49833
GUID: gov.noaa.nmfs.inport:49833
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:22+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+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