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Summary

Browse Graphic

Short Citation
OCM Partners, 2024: 2012 USGS Lidar: Brooks Camp (AK), https://www.fisheries.noaa.gov/inport/item/49624.
Full Citation Examples

Abstract

The U.S. Geological Survey (USGS) had a requirement for high resolution Lidar needed for mapping the Brooks Camp region of Katmai National Park in Alaska.

Aero-Metric, Inc. (AeroMetric) acquired highly accurate Lidar data for an area that comprises of approximately 17.5 square miles for the USGS. This acquisition was carried out to satisfy the need for high resolution elevation data in the region. A Leica ALS70 Lidar system was used in the collection of data for this project.

This project involves new Lidar data acquisition at an approximate pulse spacing of 0.6 meters. This data was to be calibrated such that all systematic errors were accounted for. The project required bare-earth classification and hydroenforcement of water bodies for the production of contours and digital elevation models.

Data was to conform to a vertical accuracy of 18.5 cm RMSE in open terrain. The accuracy as tested and published in this report has met vertical accuracy requirements as specified by the client.

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:

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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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. 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
https://coast.noaa.gov

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

Extents

Geographic Area 1

-155.833677° W, -155.602523° E, 58.577462° N, 58.471457° S

Time Frame 1
2012-05-27

Item Identification

Title: 2012 USGS Lidar: Brooks Camp (AK)
Short Name: ak2012_usgs_brooks_camp_m4797_metadata
Status: Completed
Publication Date: 2015-01-15
Abstract:

The U.S. Geological Survey (USGS) had a requirement for high resolution Lidar needed for mapping the Brooks Camp region of Katmai National Park in Alaska.

Aero-Metric, Inc. (AeroMetric) acquired highly accurate Lidar data for an area that comprises of approximately 17.5 square miles for the USGS. This acquisition was carried out to satisfy the need for high resolution elevation data in the region. A Leica ALS70 Lidar system was used in the collection of data for this project.

This project involves new Lidar data acquisition at an approximate pulse spacing of 0.6 meters. This data was to be calibrated such that all systematic errors were accounted for. The project required bare-earth classification and hydroenforcement of water bodies for the production of contours and digital elevation models.

Data was to conform to a vertical accuracy of 18.5 cm RMSE in open terrain. The accuracy as tested and published in this report has met vertical accuracy requirements as specified by the client.

Purpose:

The purpose of this data set is to provide a source for bare-earth topographic information. This data is not recommended for design grade mapping or engineering without a ground truth survey.

Notes:

10268

Supplemental Information:

This delivery consists of points classified to represent the bare-earth surface in LAS 1.2 format.

The following are the collection parameters and equipment used to create these data sets:

Aircraft: Piper Navajo (82TB)

Lidar System: Leica ALS70 (7161)

Approximate Collection Altitude (Above Mean Terrain): 1500 meters

Ground Speed: 150 kts

Lidar Pulse Rate Frequency: 70 kHz

Mirror Scan Frequency: 62 Hz

Scan Angle (+/-): 11 degrees

Side Lap: 54 percent

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.

Breaklines are available for this project though they have not been reviewed by NOAA, and are used with discretion.

A report for this project is available at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/4797/supplemental/ak2012_usgs_brooks_camp_m4797_surveyreport.pdf

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/4797/supplemental/ak2012_usgs_brooks_camp_m4797.kmz

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None Ground
None Terrain

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
None 2012
None May

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: las
Entity Attribute Overview:

LAS 1.2 format (classes 1,2,7,9,10)

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of Aerometric, INC., USGS, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 670335
Date Effective From: 2015-01-15
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: 670337
Date Effective From: 2015-01-15
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: 670338
Date Effective From: 2015-01-15
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: 670336
Date Effective From: 2015-01-15
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: 1136373
W° Bound: -155.833677
E° Bound: -155.602523
N° Bound: 58.577462
S° Bound: 58.471457

Extent Group 1 / Time Frame 1

CC ID: 1136372
Time Frame Type: Discrete
Start: 2012-05-27

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=4797

The data set is dynamically generated based on user-specified parameters.;

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: 740400
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4797
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: 740401
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/4797/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740403
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740404
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 740405
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/4797/supplemental/ak2012_usgs_brooks_camp_m4797.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the 2012 lidar project covering Brooks Camp of Katmai National Park in Alaska.

Activity Log

Activity Log 1

CC ID: 670359
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 670358
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: 718164
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740402
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

The Fundamental Vertical Accuracy (FVA) of the Classified Bare Earth files for the project area achieved an RMSE of 0.057 meters. One-hundred and Five (105) 'open terrain' survey control points were used in this evaluation, with an additional 20 'open terrain' points held in reserve and supplied to the client.

Horizontal Positional Accuracy:

Data products collected were acquired at manufacturers system specifications, with a nominal point spacing of 0.68 meters.; Quantitative Value: 0.30 meters, Test that produced the value: Acquired at or below 1500 meters above mean terrain (AMT) and have a horizontal accuracy of 0.30 meters (per manufacturers system specifications)

Vertical Positional Accuracy:

The Fundamental Vertical Accuracy (FVA) of the Classified Bare Earth for all Areas achieved is 0.057 meters at a 95% confidence level in the "Open Terrain" land cover category. One-hundred and Five (105) survey control points were used in this evaluation.; Quantitative Value: 0.057 meters, Test that produced the value: FVA of the classified bare-earth points

Completeness Measure:

Cloud Cover: 0

Completeness Report:

Complete

Conceptual Consistency:

None

Lineage

Process Steps

Process Step 1

CC ID: 1136361
Description:

Finalized airborne trajectory utilizing base-data provided by GPS INC using Leica IPAS-TC v 3.1.

Process Date/Time: 2012-06-14 00:00:00

Process Step 2

CC ID: 1136363
Description:

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

Process Date/Time: 2012-06-14 00:00:00

Process Step 3

CC ID: 1136364
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: 2012-06-20 00:00:00

Process Step 4

CC ID: 1136365
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: 2012-06-25 00:00:00

Process Step 5

CC ID: 1136366
Description:

Manual classification of any data which appears to be bare-earth but was not properly classified using the automated methods. Manual classification of powerline features. Automated classification of building features using TerraScan building classifier, manual cleanup of building points.

Process Date/Time: 2012-07-30 00:00:00

Process Step 6

CC ID: 1136367
Description:

Lidar data verified using GPS control points located throughout the project on open surfaces.

Process Date/Time: 2012-07-31 00:00:00

Process Step 7

CC ID: 1136368
Description:

Output tiled LAS 1.2 data for delivery.

Process Date/Time: 2012-08-10 00:00:00

Process Step 8

CC ID: 1136369
Description:

Convert Timestamps to Adjusted GPS Time using proprietary in-house software.

Process Date/Time: 2012-08-14 00:00:00

Process Step 9

CC ID: 1136370
Description:

Inserted georeference tags in LAS headers using proprietary in-house software.

Process Date/Time: 2012-08-14 00:00:00

Process Step 10

CC ID: 1136362
Description:

The NOAA Office for Coastal Management (OCM) received the files in laz format from USGS via an FTP online repository. The files contained lidar elevation and intensity measurements. The data were in UTM Zone 5, NAVD88 (orthometric) heights in meters. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The data were converted from UTM coordinates to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights in meters to GRS80 (ellipsoid) heights in meters using Geoid 09.

3. The LAS data were sorted by latitude and the headers were updated.

Process Date/Time: 2015-01-10 00:00:00

Catalog Details

Catalog Item ID: 49624
GUID: gov.noaa.nmfs.inport:49624
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