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Short Citation:
OCM Partners, 2022: 2005 Alaska Division of Geological & Geophysical Surveys Lidar: Unalakleet, Alaska, https://www.fisheries.noaa.gov/inport/item/49618.

Item Identification

Title: 2005 Alaska Division of Geological & Geophysical Surveys Lidar: Unalakleet, Alaska
Short Name: ak2005_unalakleet_m3648_metadata
Status: Completed
Publication Date: 2014-05
Abstract:

This report is a summary of a LiDAR data collection over the community of Unalakleet, in the Norton Sound region of Alaska. The original data were collected on October 27, 2005 by AeroMetric, Inc., under contract by Rodney P. Kinney and Associates, Inc. The complete, classified LiDAR dataset was purchased by the State of Alaska Division of Geological & Geophysical Surveys in 2013 in support of coastal vulnerability mapping efforts. For the purposes of open access to LiDAR datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. A copy of this data was supplied to the NOAA Office for Coastal Management for incorporation into the NOAA Digital Coast. The classifications of data available from the NOAA Digital Coast are: 1 (Unclassified), 2 (Ground), 3 (Low Vegetation), 4 (Medium Vegetation), 5 (High Vegetation), 6 (Buildings), 9 (Water), 10 (Ignored Ground, breakline proximity).

Original contact information:

Contact Org: Alaska Division of Geological & Geophysical Surveys

Title: GIS Manager

Phone: (907)451-5020

Email: dggsgis@alaska.gov

Purpose:

This report is a summary of a LiDAR data collection over the community of Unalakleet, in the Norton Sound region of Alaska. The original data were collected on October 27, 2005 by AeroMetric, Inc., under contract by Rodney P. Kinney and Associates, Inc. The complete, classified LiDAR dataset was purchased by the State of Alaska Division of Geological & Geophysical Surveys in 2013 in support of coastal vulnerability mapping efforts. For the purposes of open access to LiDAR datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license.

Notes:

10262

Supplemental Information:

The lidar report for this data set may be viewed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/3648/supplemental/ak2005_unalakleet_m3648_report.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/3648/supplemental/ak2005_unalakleet_m3648.kmz

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None Coastal
None Coastal and River
None Geomorphology
None Point Cloud Data
None Surface

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Holocene

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: Classified LAS points
Distribution Liability:

The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Any conclusions drawn from the analysis of this information are not the responsibility of the State of Alaska, The National Oceanic and Atmospheric (NOAA), the National Ocean Service (NOS), the Office for Coastal Management (OCM) or its partners.

Data Set Credit: This publication is funded with qualified outer continental shelf oil and gas revenues by the Coastal Impact Assistance Program, U.S. Fish and Wildlife Service, U.S. Department of the Interior. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government.

Support Roles

Data Steward

CC ID: 670101
Date Effective From: 2014-05
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: 670103
Date Effective From: 2014-05
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: 670104
Date Effective From: 2014-05
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: 670102
Date Effective From: 2014-05
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: 1135484
W° Bound: -160.83475
E° Bound: -160.748784
N° Bound: 63.917474
S° Bound: 63.844708

Extent Group 1 / Time Frame 1

CC ID: 1135483
Time Frame Type: Discrete
Start: 2005-10-27

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=3648

This 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. Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

Metadata Use Constraints:

If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.

Distribution Information

Distribution 1

CC ID: 740365
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=3648
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: 740366
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/3648/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740368
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740369
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 740370
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/3648/supplemental/ak2005_unalakleet_m3648.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for this data set.

Activity Log

Activity Log 1

CC ID: 670128
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 670127
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC Content Standard 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: 718158
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740367
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

Accuracy statements are based on areas of moderate terrain. 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, however, derived products may be less accurate in extreme terrain and dense vegetation due to a lesser number of points defining the bare-earth in these areas. Questions regarding data accuracy can be best answered by AeroMetric/Quantum Spatial (Anchorage, Alaska) staff. The dataset was provided to us in LAS 1.1 format (not in LAS 1.3 format as noted in the delivery report.)

Horizontal Positional Accuracy:

Data products collected were acquired at or below 600 meters above mean terrain (AMT) and have a horizontal accuracy of 0.4 meters (per manufacturer's system specifications) with a nominal point spacing of 0.74 meters. No direct testing of the horizontal accuracy was feasible given this dataset.

Vertical Positional Accuracy:

The bare-earth classified LiDAR data were compared to Rodney P. Kinney and Associates check points throughout the project area. A statistical summary of the elevation differences was completed. The data have a vertical accuracy of 11 cm RMSE at the 95% confidence level.

Completeness Report:

DGGS staff performed visual qualitative assessment to ensure data completeness. There are no void areas or missing data. Users should note that this dataset was acquired in 2005 and subsequently migrated to more modern specifications in 2013. Questions regarding data quality and completeness can be best answered by AeroMetric/Quantum Spatial (Anchorage, Alaska) staff. In addition to the classified point cloud data and delivery report provided by this release, AeroMetric also provided to DGGS: trajectory values, unclassified point cloud data, and a statistical summary of the elevation differences between LiDAR values and the ground survey points that were collected by Rodney P. Kinney and Associates)

Conceptual Consistency:

Quality control and quality assurance ground survey points were collected by Rodney P. Kinney and Associates and supplied to AeroMetric.

Lineage

Process Steps

Process Step 1

CC ID: 1135474
Description:

Collection - The raw LiDAR data points were captured using AeroMetric's twin-engine Cessna equipped with a OPTECH 30/70 ALTM 70 kHz LiDAR acquisition system. The system includes differential GPS (DGPS) and inertial navigation systems (INS) to provide the necessary trajectory accuracy.

Process Date/Time: 2005-01-01 00:00:00

Process Step 2

CC ID: 1135475
Description:

Processing - The airborne trajectory solution was processed in Applanix's POSPac v. 4.4, which first computes a 2 Hz Post Processed Kinematic (PPK) DGPS trajectory, then integrates the 200 Hz inertial measurement unit data for a final smoothed best estimate of trajectory (SBET). This SBET is then integrated with the LiDAR pulse data, utilizing Optech's REALM software, for a final x,y,z 'point cloud' dataset in industry standard LAS (LiDAR Accuracy Standard) format in the NAD83, Universal Transverse Mercator (UTM), Zone 4 Meters coordinate system with ellipsoidal heights.

Process Date/Time: 2006-01-01 00:00:00

Process Step 3

CC ID: 1135476
Description:

Migration and calibration - For this delivery, AeroMetric gathered the necessary data from the Unalakleet archive drive. Using GeoCue (V2012.1.27.5), AeroMetric converted the LAS swath data to NAVD88 GEOID09, NAD83 UTM Zone 4. The archived LAS swath data lacked return and scan angle information. Individual points were classified based on return number. Using proprietary in-house software, AeroMetric was able to use these classifications and timestamps to calculate the point return fields. Polygons were digitized along flight line edges to re-class the geometrically unreliable points near the extreme edge of the swath to help with calibration. An in-situ calibration was performed using the data collect for this project. The dataset was classified in each line separately for ground and other common features between lines, such as building roofs. This dataset was processed in TerraSolid's TerraMatch (Version 11.001) to compute corrections for roll, pitch, heading, and mirror scale. These corrections are applied in order to minimize discrepancies between flight lines.

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

Process Step 4

CC ID: 1135477
Description:

Classification - AeroMetric preformed 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. This step was followed by manual classification of any data which appeared to be poorly classified using the automated methods. Breaklines were digitized along coast and water bodies that met project standards listed above.

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

Process Step 5

CC ID: 1135478
Description:

Verification - Rodney P. Kinney (RPK) and Associates provided AeroMetric with Post Processed Kinematic (PPK) Quality Assurance and Quality Control (QAQC) data, to check the vertical accuracy of these LiDAR data. The 2006 control file had to be translated by AeroMetric from GEOID99 to GEOID09. A comparison between the QAQC and the LiDAR point data were made using TerraScan, to determine any vertical bias in the data. An adjustment of 0.21 meters was applied to the LiDAR data in order to match the provided QAQC data.

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

Process Step 6

CC ID: 1135479
Description:

Classified LAS 1.1 files - AeroMetric created classified LAS 1.1 files using the client provided tiling scheme. The points within each tile are sorted sequentially in order of acquisition, and have adjusted GPS timestamps. Note: that the Acquisition and Processing Report provided by AeroMetric incorrectly cites the deliverable format as LAS 1.3.

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

Process Step 7

CC ID: 1135480
Description:

File compression - LAS files were compressed to LAZ format to facilitate online distribution

Process Date/Time: 2014-01-01 00:00:00

Process Step 8

CC ID: 1135481
Description:

The lidar files were received by the NOAA Office for Coastal Management for incorporation into the NOAA Digital Coast. The data consisted of 19 lidar files. The data were in LAS format 1.1 and were in UTM, Zone 4, NAD83, meters coordinates. The data were in NAVD88 (Geoid09), meters vertical units. The classifications of the data are: 1 (Unclassified), 2 (Ground), 3 (Low Vegetation), 4 (Medium Vegetation), 5 (High Vegetation), 6 (Buildings), 9 (Water), 10 (Ignored Ground, breakline proximity). For Digital Coast data storage and provisioning, the NOAA OCM performed the following processing: 1. The data were reviewed for any elevation outliers. 2. The data were converted from UTM, Zone 4 coordinates to geographic coordinates. 3. The data were converted from NAVD88 elevations to ellipsoid elevations using Geoid09. 4. The data were zipped to laz format.

Process Date/Time: 2014-05-13 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity point_cloud_data

Catalog Details

Catalog Item ID: 49618
GUID: gov.noaa.nmfs.inport:49618
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