2013 UAF/GINA Lidar: Vallenar Bay, Alaska
Data Set (DS) | OCM Partners (OCMP)GUID: gov.noaa.nmfs.inport:53623 | Updated: October 17, 2023 | Published / External
Summary
Short Citation
OCM Partners, 2024: 2013 UAF/GINA Lidar: Vallenar Bay, Alaska, https://www.fisheries.noaa.gov/inport/item/53623.
Full Citation Examples
The University of Alaska Fairbanks, Geographic Information Network of Alaska (UAF/GINA) provided Aero-Metric, Inc. (AeroMetric) and Watershed Sciences, Inc. (WSI) with detailed specifications for this project in the spring of 2013. Planning and acquisition of airborne LiDAR data was carried out by WSI in early May of 2013.
This delivery contains point cloud data in LAS 1.2 format classified in the following manner:
Class 1: Unclassified
Class 2: Bare Earth Ground
Class 3: Low Vegetation (vegetation within 12 inches of the ground surface)
Class 4: Medium Vegetation (vegetation greater than 12 inches, but less than 36 inches above the ground surface)
Class 5: High Vegetation (vegetation greater than 36 inches above the ground surface)
Class 6: Buildings
Class 7: Noise
Class 8: Ground Model Keypoints
Class 9: Water
Class 10: Breakline Proximity
Class 14: Bridge Decks
The following are the collection parameters and equipment used to create these data sets:
Aircraft: Cessna Caravan (N604MD)
LiDAR System: Leica ALS60
Approximate Collection Altitude (Above Mean Terrain): 900 meters
Ground Speed: 160 kts
Pulse Rate Frequency: 98-106 kHz
Mirror Scan Frequency: 66 Hz
Scan Angle (+/-): 14 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.
The NOAA Office for Coastal Management (OCM) downloaded this lidar data from the AK DGGS site (https://elevation.alaska.gov/) and processed the data to be available on the Digital Coast Data Access Viewer (DAV). OCM processed all points to the Digital Coast Data Access Viewer (DAV).
Distribution Information
-
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base.
-
LAS/LAZ - LASer
Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document.
None
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.
Controlled Theme Keywords
COASTAL ELEVATION, elevation, TERRAIN 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
-131.851962111° W,
-131.724883444° E,
55.410482472° N,
55.312103583° S
2013-05-07
Item Identification
Title: | 2013 UAF/GINA Lidar: Vallenar Bay, Alaska |
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Short Name: | ak2013_vallenar_m8595_metadata |
Status: | Completed |
Publication Date: | 2013-09-12 |
Abstract: |
The University of Alaska Fairbanks, Geographic Information Network of Alaska (UAF/GINA) provided Aero-Metric, Inc. (AeroMetric) and Watershed Sciences, Inc. (WSI) with detailed specifications for this project in the spring of 2013. Planning and acquisition of airborne LiDAR data was carried out by WSI in early May of 2013. This delivery contains point cloud data in LAS 1.2 format classified in the following manner: Class 1: Unclassified Class 2: Bare Earth Ground Class 3: Low Vegetation (vegetation within 12 inches of the ground surface) Class 4: Medium Vegetation (vegetation greater than 12 inches, but less than 36 inches above the ground surface) Class 5: High Vegetation (vegetation greater than 36 inches above the ground surface) Class 6: Buildings Class 7: Noise Class 8: Ground Model Keypoints Class 9: Water Class 10: Breakline Proximity Class 14: Bridge Decks
The following are the collection parameters and equipment used to create these data sets:
Aircraft: Cessna Caravan (N604MD) LiDAR System: Leica ALS60 Approximate Collection Altitude (Above Mean Terrain): 900 meters Ground Speed: 160 kts Pulse Rate Frequency: 98-106 kHz Mirror Scan Frequency: 66 Hz Scan Angle (+/-): 14 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. The NOAA Office for Coastal Management (OCM) downloaded this lidar data from the AK DGGS site (https://elevation.alaska.gov/) and processed the data to be available on the Digital Coast Data Access Viewer (DAV). OCM processed all points to the Digital Coast Data Access Viewer (DAV). |
Purpose: |
The purpose of this data set is to provide LiDAR-derived topographic data for transportation planning and road construction. |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
|
Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
|
ISO 19115 Topic Category |
elevation
|
UNCONTROLLED | |
None | beach |
None | erosion |
None | Terrain |
Spatial Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA
|
Global Change Master Directory (GCMD) Location Keywords |
VERTICAL LOCATION > LAND SURFACE
|
Instrument Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Instrument Keywords |
LIDAR > Light Detection and Ranging
|
Platform Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Platform Keywords |
Airplane > Airplane
|
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Data Set Type: | Elevation |
Maintenance Frequency: | None Planned |
Data Presentation Form: | Point Cloud (digital) |
Distribution Liability: |
AeroMetric assumes no liability for the data being used for purposes other than stated in this document. Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners. |
Data Set Credit: | AeroMetric, Watershed Sciences, Inc. |
Support Roles
Data Steward
Date Effective From: | 2018 |
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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
Date Effective From: | 2018 |
---|---|
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
Date Effective From: | 2018 |
---|---|
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
Date Effective From: | 2018 |
---|---|
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 |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -131.851962111 | |
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E° Bound: | -131.724883444 | |
N° Bound: | 55.410482472 | |
S° Bound: | 55.312103583 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
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Start: | 2013-05-07 |
Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
Data is available online for custom and bulk downloads. |
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. |
Distribution Information
Distribution 1
Start Date: | 2018 |
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End Date: | Present |
Download URL: | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8595 |
Distributor: | |
File Name: | Customized Download |
Description: |
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. |
Compression: | Zip |
Distribution 2
Start Date: | 2018 |
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End Date: | Present |
Download URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8595/index.html |
Distributor: | |
File Name: | Bulk Download |
Description: |
Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document. |
File Type (Deprecated): | LAZ |
Distribution Format: | LAS/LAZ - LASer |
Compression: | Zip |
URLs
URL 1
URL: | https://coast.noaa.gov/ |
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Name: | NOAA's Office for Coastal Management (OCM) website |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
Information on the NOAA Office for Coastal Management (OCM) |
URL 2
URL: | https://coast.noaa.gov/dataviewer/ |
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Name: | NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. |
URL 3
URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8595/supplemental/ak2013_vallenar.kmz |
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Name: | Browse graphic |
URL Type: |
Browse Graphic
|
File Resource Format: | KML |
Description: |
This graphic displays the footprint for this lidar data set. |
URL 4
URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8595/supplemental/Vallenar_Bay_LiDAR_Processing_QAQC.pdf |
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Name: | Dataset report |
URL Type: |
Online Resource
|
File Resource Format: | |
Description: |
Link to data set report. |
Technical Environment
Description: |
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; LiDARTools 1.0.9 |
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Data Quality
Horizontal Positional Accuracy: |
Data products collected were acquired at or below 900 meters above mean terrain (AMT) and have a horizontal accuracy of 0.2 meters or better (per manufacturers system specifications). |
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Vertical Positional Accuracy: |
The vertical accuracy of the Classified Bare Earth for Vallenar Bay is 0.275 US Survey Feet at a 95% confidence level (RMSE*1.96 (95% CI - NSSDA)) in the "Open Terrain" land cover category or 4.3 cm RMSE. 634 survey control points were used for the Vallenar Bay data. The Consolidated Vertical Accuracy is 0.45 US Survey Feet at the 95th Percentile, calculated using 762 check points. Supplemental Vertical Accuracies are as follows: Open-Logged : 0.66 US Survey Feet at the 95th Percentile Tall Grass : 1.12 US Survey Feet at the 95th Percentile Mixed Brush : 0.62 US Survey Feet at the 95th Percentile Mature Trees : 0.45 US Survey Feet at the 95th Percentile Small Trees : 1.8 US Survey Feet at the 95th Percentile |
Completeness Report: |
Complete |
Conceptual Consistency: |
QAQC ground survey points were collected by SurvBase, LLC and supplied to Watershed Sciences, Inc. (WSI) |
Lineage
Process Steps
Process Step 1
Description: |
WSI created 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 two dual frequency GPS receivers, collecting data at a rate of 2 Hz operated by Aero-Metric during the acquisition phase of this project, and were referenced to NAD83 (CORS96) ellipsoid heights. |
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Process Date/Time: | 2013-05-31 00:00:00 |
Process Step 2
Description: |
WSI integrated SBET and raw laser data to produce point cloud data in LAS 1.2 format for each flight line. |
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Process Date/Time: | 2013-06-03 00:00:00 |
Process Step 3
Description: |
WSI processed data calibration: An in-situ calibration was performed using the data collect for this project. The data was classified in each line separately for ground and other common features between lines, such as building roofs. This data was processed in TerraMatch 11.001 (TerraSolid, Ltd.), to compute corrections for roll, pitch, heading, and mirror scale. These corrections are applied in order to minimize discrepancies between flight lines. |
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Process Date/Time: | 2013-06-12 00:00:00 |
Process Step 4
Description: |
WSI 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. |
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Process Date/Time: | 2013-06-13 00:00:00 |
Process Step 5
Description: |
WSI manually classified any data which appears to be improperly classified using the automated methods. |
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Process Date/Time: | 2013-06-20 00:00:00 |
Process Step 6
Description: |
WSI provided AeroMetric with calibrated, vertically adjusted, and classified LiDAR data in the Vallenar Bay area. |
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Process Date/Time: | 2013-06-25 00:00:00 |
Process Step 7
Description: |
AeroMetric completed a series of evaluations including verifying density requirements, confirming relative and absolute accuracies, reviewing coverage and classification's, and confirming the reproducibility of ranges within the LiDAR Data. |
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Process Step 8
Description: |
Due to tiling artifacts being identified in the low vegetation and high vegetations, using a automated method those classes were properly re-classified. |
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Process Date/Time: | 2013-09-09 00:00:00 |
Process Step 9
Description: |
Create point cloud data, by tile in LAS 1.2 format. |
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Process Step 10
Description: |
The NOAA Office for Coastal Management (OCM) downloaded 32 laz files from the Alaska Division of Geological and Geophysical Surveys data Portal (https://elevation.alaska.gov/). The files contained classified elevation and intensity measurements for the 2013 Vallenar Bay data set. The data were in Alaska State Plane, Zone 5001 coordinates (NAD83 2011, US survey feet) and NAVD88 elevations (GEOID12A) in feet. The data were classified: Class 1: Unclassified, Class 2: Bare-earth ground, Class 3: Low vegetation, Class 4: Medium Vegetation, Class 5: High Vegetation, Class 6_ Buildings, Class 7: Noise, Class 8: Ground Model Keypoints, Class 9: Water, Class 10: Breakline Proximity, Class 14: Bridge Decks. Low vegetation is defined in the report as vegetation within 12 inches of the ground surface, medium vegetation as vegetation greater than 12 inches, but less than 36 inches above the ground surface and high vegetation as vegetation greater than 36 inches above the ground surface. OCM processed all points to the Digital Coast Data Access Viewer (DAV). OCM performed the following processing on the data for Digital Coast storage and provisioning purposes: 1. The LAStools software scripts lasinfo and lasvalidate were run on the laz files to check for errors. 2. An internal OCM script was run to check the number of points by classification and by flight ID and the gps times and intensity ranges. 3. Internal OCM scripts were run on the laz files to convert from Alaska State Plane, Zone 5001 coordinates to geographic coordinates, to convert from NAVD88 elevations to ellipsoid elevations using the GEOID12A model, to convert from feet to meters, to assign the geokeys, to assign a lidar domain profile, to sort the data by gps time and zip the data to database and to http. |
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Process Date/Time: | 2018-09-10 00:00:00 |
Process Contact: | Office for Coastal Management (OCM) |
Catalog Details
Catalog Item ID: | 53623 |
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GUID: | gov.noaa.nmfs.inport:53623 |
Metadata Record Created By: | Rebecca Mataosky |
Metadata Record Created: | 2018-09-10 11:35+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2023-10-17 16:12+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 |