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

Summary

Browse Graphic

Short Citation
OCM Partners, 2024: 2012 USACE Post Sandy Topographic LiDAR: Virginia and Maryland, https://www.fisheries.noaa.gov/inport/item/49610.
Full Citation Examples

Abstract

TASK ORDER NAME: VIRGINIA AND MARYLAND LIDAR ACQUISITION FOR SANDY RESPONSE

CONTRACT NUMBER: W912P9-10-D-0533

TASK ORDER NUMBER: W81C8X2314841

Woolpert Project Number: 72903

HQUSACE required high-resolution digital elevation data developed from airborne LiDAR technology for the Assateague Island, MD; Assateague Island, VA; Tangier Island, VA; Cape Henry to Willoughby Point, VA; AOIs for a total of

approximately eighty (80) square miles in the North Atlantic Division.

FINAL DELIVERABLES:

The final deliverables are listed below. The final LiDAR data was delivered in a UTM projection tiling format, based on a modular layout. The tiles were clipped to eliminate overlap between adjacent tiles.

The 1000 meter x 1000 meter tile file name was derived from the National Grid naming convention.

Original contact information:

Contact Org: US Army Engineer District St. Louis

Phone: 314-331-8389

Distribution Information

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

  • Simple download of data files.

Access Constraints:

No restrictions apply to this 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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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. These data depict the heights at the time of the survey and are only accurate for that time.

Controlled Theme Keywords

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

-76.335528° W, -75.022929° E, 38.488328° N, 36.862742° S

Time Frame 1
2012-11-09
Time Frame 2
2012-11-10
Time Frame 3
2012-11-11

Item Identification

Title: 2012 USACE Post Sandy Topographic LiDAR: Virginia and Maryland
Short Name: 2012_USACE_PostSandy_MD_VA_lidar_m1437_metadata
Status: Completed
Publication Date: 2013-01
Abstract:

TASK ORDER NAME: VIRGINIA AND MARYLAND LIDAR ACQUISITION FOR SANDY RESPONSE

CONTRACT NUMBER: W912P9-10-D-0533

TASK ORDER NUMBER: W81C8X2314841

Woolpert Project Number: 72903

HQUSACE required high-resolution digital elevation data developed from airborne LiDAR technology for the Assateague Island, MD; Assateague Island, VA; Tangier Island, VA; Cape Henry to Willoughby Point, VA; AOIs for a total of

approximately eighty (80) square miles in the North Atlantic Division.

FINAL DELIVERABLES:

The final deliverables are listed below. The final LiDAR data was delivered in a UTM projection tiling format, based on a modular layout. The tiles were clipped to eliminate overlap between adjacent tiles.

The 1000 meter x 1000 meter tile file name was derived from the National Grid naming convention.

Original contact information:

Contact Org: US Army Engineer District St. Louis

Phone: 314-331-8389

Purpose:

The data will be used by the USACE to generate digital elevation models and contours for use in, damage assessment to USACE projects, engineering design and design reviews, conservation planning, research, delivery,

floodplain mapping, and hydrologic modeling utilizing LiDAR technology. The task order required that the LiDAR data was to be acquired within six (6) days of receiving Notice to Proceed (NTP). The project data will

consist of high accuracy classified bare-earth LiDAR data in LAS format well as raster digital elevation models per task order requirements. The specifications are based upon the U.S. Geological Survey National Geospatial

Program Lidar Base Specifications 1.0, which may be viewed at http://pub.usgs.gov/tm/11b4/.

Notes:

10254

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/geoid18/1437/supplemental/2012_USACE_PostSandy_MD_VA_footprint.KMZ

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: las
Distribution Liability:

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

of Woolpert, USACE, USGS, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 669748
Date Effective From: 2013-01
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: 669750
Date Effective From: 2013-01
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: 669751
Date Effective From: 2013-01
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: 669749
Date Effective From: 2013-01
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: 1133461
W° Bound: -76.335528
E° Bound: -75.022929
N° Bound: 38.488328
S° Bound: 36.862742

Extent Group 1 / Time Frame 1

CC ID: 1133458
Time Frame Type: Discrete
Start: 2012-11-09

Extent Group 1 / Time Frame 2

CC ID: 1133459
Time Frame Type: Discrete
Start: 2012-11-10

Extent Group 1 / Time Frame 3

CC ID: 1133460
Time Frame Type: Discrete
Start: 2012-11-11

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=1437

;

Data Access Constraints:

No restrictions apply to this data.

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. These data depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 740319
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1437
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: 740320
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1437/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740322
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740323
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 740324
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1437/supplemental/2012_USACE_PostSandy_MD_VA_footprint.KMZ
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the post Sandy LiDAR coverage for Maryland and Virginia.

Activity Log

Activity Log 1

CC ID: 669771
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 669770
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: 718051
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740321
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows Vista Version 6.1 (Build 7600) ; TerraSolid LTD: Terrascan Version 11.01

Data Quality

Horizontal Positional Accuracy:

Horizontal accuracy is +/- 0.304m at the 95% confidence level.; Quantitative Value: 0.304 meters, Test that produced the value: Units in meters. LiDAR system calibration is available upon request from Woolpert, Inc.

Vertical Positional Accuracy:

The LAS data for the LiDAR Acquisition for Sandy Response Virginia and Maryland Areas of

Interest was compared to survey control points to determine the FVA of the LAS Swath and of the Bare-

Earth DEM.

LAS Swath Fundamental Vertical Accuracy (FVA) Tested 0.143m (14.3cm) fundamental

vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open

terrain using 0.073m (7.3cm) (RMSEz x 1.96000, tested against the TIN).

Bare-Earth DEM Fundamental Vertical Accuracy (FVA) Tested 0.143m (14.3cm) fundamental

vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open

terrain using 0.073m (7.3cm) (RMSEz x 1.96000, tested against the DEM).

; Quantitative Value: 0.143 meters, Test that produced the value:

Units in meters. LAS Swath Fundamental Vertical Accuracy (FVA) Tested 0.143m (14.3cm) fundamental

vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open

terrain using 0.073m (7.3cm) (RMSEz x 1.96000, tested against the TIN).

; Quantitative Value: 0.143 meters, Test that produced the value:

Units in meters. Bare-Earth DEM Fundamental Vertical Accuracy (FVA) Tested 0.143m (14.3cm) fundamental

vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open

terrain using 0.073m (7.3cm) (RMSEz x 1.96000, tested against the DEM).

Completeness Measure:

Cloud Cover: 0

Completeness Report:

Complete

Conceptual Consistency:

The data is visually inspected by Woolpert, Inc.

Lineage

Process Steps

Process Step 1

CC ID: 1133452
Description:

Using an Optech Gemini LiDAR Sensor, 32 flight lines of high density data, at a nominal pulse spacing (NPS) of 1 meter, were collected along the Virginia coastal area separated into areas of interest: Assateague Island (Maryland),

Assateague Island (Virginia), Tangier Island (Virginia), and Cape Henry to Willoughby Point (Virginia) (approximately 80 square miles). Data Acquisition Height = 5,500 feet AGL - Aircraft Speed = 125 Knots. Multiple returns were

recorded for each laser pulse along with an intensity value for each return. A total of three (3) missions were flown during a period from November 9, 2012 through November 11, 2012. Two airborne global positioning system (GPS)

base stations were used in support of the LiDAR data acquisition. Sixteen (16) ground control points were surveyed through static methods. The geoid used to reduce satellite derived elevations to orthometric heights was Geoid12A.

Data for the task order is referenced to the UTM Zone 18N, North American Datum of 1983 (NAD83), and NAVD88, in Meters. Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a

smoothed best estimate of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The coverage was classified to extract a bare earth digital elevation

model (DEM) and separate last returns. In addition to the LAS deliverables, one layer of coverage was delivered in the ArcGrid Format: bare-earth.

Process Date/Time: 2012-11-09 00:00:00

Process Step 2

CC ID: 1133453
Description:

The LiDAR system calibration and system performance is verified on a periodic basis using Woolpert's calibration range. The calibration range consists of a large building and runway. The edges of the building and control points

along the runway have been located using conventional survey methods. Inertial measurement unit (IMU) misalignment angles and horizontal accuracy are calculated by comparing the position of the building edges between opposing

flight lines. The scanner scale factor and vertical accuracy is calculated through comparison of LiDAR data against control points along the runway. Field calibration is performed on all flight lines to refine the IMU

misalignment angles. IMU misalignment angles are calculated from the relative displacement of features within the overlap region of adjacent (and opposing) flight lines. The raw LiDAR data is reduced using the refined

misalignment angles.

Process Date/Time: 2012-01-01 00:00:00

Process Step 3

CC ID: 1133454
Description:

Once the data acquisition and GPS processing phases are complete, the LiDAR data was processed immediately to verify the coverage had no voids. The GPS and IMU data was post processed using differential and Kalman filter

algorithms to derive a best estimate of trajectory. The quality of the solution was verified to be consistent with the accuracy requirements of the project.

Process Date/Time: 2012-11-12 00:00:00

Process Step 4

CC ID: 1133455
Description:

The individual flight lines were inspected to ensure the systematic and residual errors have been identified and removed. Then, the flight lines were compared to adjacent flight lines for any mismatches to obtain a homogenous

coverage throughout the project area. The point cloud underwent a classification process to determine bare-earth points and non-ground points utilizing "first and only" as well as "last of many" LiDAR returns. This process

determined Default (Class 1), Ground (Class 2),Noise (Class 7), Model Key Points (Class 8), and Overlap (Class 12) classifications. The bare-earth (Class 2 - Ground) LiDAR points underwent a manual QA/QC step to verify that

artifacts have been removed from the bare-earth surface. The surveyed ground control points are used to perform the accuracy checks and statistical analysis of the LiDAR dataset.

Process Date/Time: 2012-11-12 00:00:00

Process Step 5

CC ID: 1133456
Description:

The NOAA Office for Coastal Management (OCM) received topographic files in LAS format. The files contained lidar

elevation and intensity measurements. The data were received in projected coordinates of NAD83 UTM18N, meters

and were vertically referenced to NAVD88 using the Geoid12a model. The vertical units of the data were

meters. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The topographic las files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid12a.

2. The topographic las files were converted from Projected Coordinates (NAD83 UTM18N, meters) to Geographic Coordinates (NAD83, decimal degrees).

Process Date/Time: 2013-01-01 00:00:00

Catalog Details

Catalog Item ID: 49610
GUID: gov.noaa.nmfs.inport:49610
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:21+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