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Short Citation:
OCM Partners, 2022: 2009 Aero-Metric Inc. Topographic LiDAR: Yukon Flats, Alaska, https://www.fisheries.noaa.gov/inport/item/49622.

Item Identification

Title: 2009 Aero-Metric Inc. Topographic LiDAR: Yukon Flats, Alaska
Short Name: ak2009_aerometric_yukonflats_m1467_metadata
Status: Completed
Publication Date: 2013-03
Abstract:

This delivery contains point cloud data in LAS 1.2 format, classified in the following manner. Class 1: Unclassified and Class 2: Ground. Overlap points have been flagged as withheld. The timestamps are in absolute

GPS time minus 1 billion, in accordance with the LAS 1.2 documentation.

The following are the collection parameters and equipment used to create this data set.

Aircraft: Piper Navajo (N6GR)

Lidar System: Optech ALTM Gemini (03SEN145)

Approximate Collection Altitude (Above Mean Terrain): 3800 meters

Ground Speed: 160 kts

Pulse Rate Frequency: 33 kHz

Mirror Scan Frequency: 18 Hz

Scan Angle (+/-): 16 degrees

Beam Divergence: Narrow (0.25 mrad)

Scan Cutoff: 0.02 degrees

Accuracy statements are based on areas of moderate terrain, with points classified as ground. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The accuracy of each point is expected to

meet the vertical accuracy standard, derived products may be less accurate in areas of extreme terrain and dense vegetation due to a lesser number of points defining the ground in these areas.

Classified data sets such as this one may have varying posting due to some pulses not reaching the ground.

Original contact information:

Contact Name: Jacques Cloutier

Contact Org: Aero-Metric, Inc.

Title: Senior Geodetic Surveyor

Phone: (907) 272-4495

Email: aerometric@aerometric-ak.com

Purpose:

The purpose of this data set is to provide bare-earth processed lidar data over the project area Southwest of Fort Yukon, at an average point spacing of 2.3 meters.

Notes:

10266

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
Entity Attribute Overview:

Unclassified Lidar point cloud in LAS 1.2 format

Entity Attribute Detail Citation:

none

Distribution Liability:

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

of Aero-Metric Inc, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 670264
Date Effective From: 2013-03
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: 670266
Date Effective From: 2013-03
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: 670267
Date Effective From: 2013-03
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: 670265
Date Effective From: 2013-03
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: 1133600
W° Bound: -146.740652
E° Bound: -145.033223
N° Bound: 66.592735
S° Bound: 65.754782

Extent Group 1 / Time Frame 1

CC ID: 1133595
Time Frame Type: Discrete
Start: 2009-07-14

Extent Group 1 / Time Frame 2

CC ID: 1133596
Time Frame Type: Discrete
Start: 2009-07-15

Extent Group 1 / Time Frame 3

CC ID: 1133597
Time Frame Type: Discrete
Start: 2009-07-16

Extent Group 1 / Time Frame 4

CC ID: 1133598
Time Frame Type: Discrete
Start: 2009-07-22

Extent Group 1 / Time Frame 5

CC ID: 1133599
Time Frame Type: Discrete
Start: 2009-09-03

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=1467

;

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. These data

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

Distribution Information

Distribution 1

CC ID: 740388
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1467
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: 740389
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/1467/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740391
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740392
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 740393
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/1467/supplemental/ak2009_aerometric_yukonflats_footprint.KMZ
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows topographic LiDAR coverage for the Yukon Flats, Alaska.

Activity Log

Activity Log 1

CC ID: 670286
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 670285
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: 718162
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740390
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

All these data products were acquired at 3800 meters above mean terrain (AMT) and have a horizontal accuracy of 1.15 meters, with a nominal point spacing of 2.3 meters as per manufacturer's specifications, not field verified.; Quantitative Value: 1.15 meters, Test that produced the value: Compiled to meet value (meters)

Vertical Positional Accuracy:

These values were computed by verifying the ground classified lidar data against ground surveyed points at the Fort Yukon airport. The points were collected throughout the project area by John Seibert of Pro Survey Services.

We recommend additional ground truth surveys of the data set to verify the vertical accuracy has not changed due to natural causes, such as techtonic motion or freeze/thaw cycles, and non-natural causes such as road construction.

Without ground truth survey checks this data is not recommended for design grade mapping or engineering.

; Quantitative Value: 0.10 meters, Test that produced the value: Consolidated vertical accuracy at the 95th percentile along road and runway surfaces (meters).

Completeness Report:

Complete

Conceptual Consistency:

Data has been verified using surveyed check points around the Fort Yukon Airport within the project area. All data was collected to meet the National Standard for Spatial Database Accuracy (NSSDA).

Lineage

Process Steps

Process Step 1

CC ID: 1133585
Description:

Create a smoothed-best estimated trajectory (SBET) of the sensor at a rate of 200 Hz, by integrating the airborne GPS and IMU data The basis of the GPS coordinates were established using OPUS, and were referenced to

NAD83 (CORS96) with ellipsoidal heights. The mean GPS positional accuracy for this area was +/- 0.08 meters.

Process Date/Time: 2009-07-15 00:00:00

Process Step 2

CC ID: 1133586
Description:

Integrate SBET and raw laser data to produce point cloud data in LAS 1.2 format for each flight line.

Process Date/Time: 2009-07-17 00:00:00

Process Step 3

CC ID: 1133587
Description:

Compute the roll, pitch, heading, and mirror scale correction factors for each flight line, then apply corrections to the corresponding flight line.

Process Date/Time: 2009-08-01 00:00:00

Process Step 4

CC ID: 1133588
Description:

Automated classification of the bare-earth data from the lidar point cloud using a series of algorithms customized for the types of terrain encountered in the project.

Process Date/Time: 2009-09-15 00:00:00

Process Step 5

CC ID: 1133589
Description:

Manual classification of any data which appears to be bare-earth but was not properly classified using the automated methods.

Process Date/Time: 2009-09-20 00:00:00

Process Step 6

CC ID: 1133590
Description:

Create point clouds in LAS 1.2 format for all returns with GPS week timstamps.

Process Date/Time: 2009-12-20 00:00:00

Process Step 7

CC ID: 1133591
Description:

Convert point clouds with GPS week timestamps, to point clouds with absolute GPS timestamps, in LAS 1.2 format.

Process Date/Time: 2009-11-14 00:00:00

Process Step 8

CC ID: 1133592
Description:

Data verified using survey control points, located throughout the area.

Process Date/Time: 2009-11-16 00:00:00

Process Step 9

CC ID: 1133593
Description:

The NOAA Office for Coastal Management (OCM) received topographic files in LAS 1.2 format. The files contained lidar

elevation and intensity measurements. The data were received in projected coordinates of NAD83 UTM6N, meters

and were vertically referenced to NAVD88 orthometric elevations using GEOID06(Alaska). 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 Projected Coordinates (NAD83 UTM6N, meters) to Geographic Coordinates (NAD83, decimal degrees).

2. The topographic las files were vertically converted from orthometric elevations (NAVD88) to ellipsoidal elevations (NAD83) with GEOID06.

Process Date/Time: 2013-03-01 00:00:00

Catalog Details

Catalog Item ID: 49622
GUID: gov.noaa.nmfs.inport:49622
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