2012 USGS Lidar: Brooks Camp (AK)
OCM Partners
Data Set
(DS)
| ID: 49624
| Published / External
Created: 2017-11-15
|
Last Modified: 2022-08-09
Project (PRJ) | ID: 49401
ID: 49624
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | 2012 USGS Lidar: Brooks Camp (AK) |
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Short Name | ak2012_usgs_brooks_camp_m4797_metadata |
* Status | Completed |
Creation Date | |
Revision Date | |
• 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 |
Other Citation Details | |
• 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 |
DOI (Digital Object Identifier) | |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
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ISO 19115 Topic Category | elevation |
None | Ground |
None | Terrain |
Temporal Keywords
Thesaurus | Keyword |
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None | 2012 |
None | May |
* Spatial Keywords
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Platform Keywords
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Physical Location
• » Organization | Office for Coastal Management |
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• » City | Charleston |
• » State/Province | SC |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | |
• Maintenance Frequency | None Planned |
Maintenance Note | |
» Data Presentation Form | las |
• Entity Attribute Overview |
LAS 1.2 format (classes 1,2,7,9,10) |
Entity Attribute Detail Citation |
none |
Entity Attribute Detail URL | |
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. |
Data Set Credit |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2015-01-15 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2015-01-15 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Metadata Contact |
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* » Date Effective From | 2015-01-15 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
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* » Date Effective From | 2015-01-15 |
Date Effective To | |
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 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
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Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -155.833677 |
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* » E° Bound | -155.602523 |
* » N° Bound | 58.577462 |
* » S° Bound | 58.471457 |
* » Description |
Extent Group 1 / Vertical Extent
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Extent Group 1 / Time Frame 1
* » Time Frame Type | Discrete |
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* » Start | 2012-05-27 |
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Description |
Spatial Information
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Spatial Representation
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Vector Representation Used? | Yes |
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Access Information
Data License | |
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Data License URL | |
Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» 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. |
Metadata Access Constraints | |
Metadata Use Constraints |
Distribution Information
Start Date | |
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» 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. |
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Compression | |
Review Status |
Start Date | |
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» 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. |
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URLs
URL | https://coast.noaa.gov/dataviewer |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | https://coast.noaa.gov |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/4797/supplemental/ak2012_usgs_brooks_camp_m4797.kmz |
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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. |
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Activity Log
Activity Time | 2016-05-23 |
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Activity Type | |
Responsible Party | |
Description |
Date that the source FGDC record was last modified. |
Activity Time | 2017-11-14 |
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Activity Type | |
Responsible Party | |
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 Time | 2018-02-08 |
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Activity Type | |
Responsible Party | |
Description |
Partial upload of Positional Accuracy fields only. |
Activity Time | 2018-03-13 |
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Partial upload to move data access links to Distribution Info. |
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Technical Environment
Description |
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Data Quality
Representativeness | |
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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. |
Analytical Accuracy | |
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 |
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Completeness Measure |
Cloud Cover: 0 |
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Completeness Report |
Complete |
Conceptual Consistency |
None |
» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | |
» Do these Data Comply with the Data Access Directive? | |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» Actual or Planned Long-Term Data Archive Location | |
» If World Data Center or Other, Specify | |
» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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» Approximate Delay Between Data Collection and Archiving | |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
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Lineage
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Sources
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Process Steps
Process Step Number | 1 |
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» 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 |
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Process Step Number | 2 |
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» 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 |
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Process Step Number | 3 |
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» 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 |
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Process Step Number | 4 |
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» 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 |
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Process Step Number | 5 |
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» 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 |
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Process Step Number | 6 |
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» Description |
Lidar data verified using GPS control points located throughout the project on open surfaces. |
Process Date/Time | 2012-07-31 00:00:00 |
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Process Step Number | 7 |
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» Description |
Output tiled LAS 1.2 data for delivery. |
Process Date/Time | 2012-08-10 00:00:00 |
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Process Step Number | 8 |
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» Description |
Convert Timestamps to Adjusted GPS Time using proprietary in-house software. |
Process Date/Time | 2012-08-14 00:00:00 |
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Process Step Number | 9 |
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» Description |
Inserted georeference tags in LAS headers using proprietary in-house software. |
Process Date/Time | 2012-08-14 00:00:00 |
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Process Step Number | 10 |
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» 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 |
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Acquisition Information
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FAQs
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Child Items
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Catalog Details
Catalog Item ID | 49624 |
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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 Workflow State | Published / External |
Metadata Last Review Date | 2022-03-16 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2023-03-16 |
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