Short Citation:
Office for Coastal Management, 2021: 2011 Alaska Matanuska and Susitna Boroughs Lidar Point Clouds, https://www.fisheries.noaa.gov/inport/item/48144.

Item Identification

Title: 2011 Alaska Matanuska and Susitna Boroughs Lidar Point Clouds
Short Name: ak2011_matsu_m2609_metadata
Status: Completed
Publication Date: 2012-06-27
Abstract:

The Matanuska Susitna Borough LiDAR/Imagery Project covers 3680 sq/mi of the Matanuska-Susitna Borough in Alaska. Project parnters and funding sources include: Coastal Impact Assistance Program, Alaska Industrial Development and Export Authority, Alaska Energy Authority, United States Geological Survey, Matanuska Susitna Borough, United States Army Corps of Engineers, United States Fish and Wildlife Service, The Nature Conservancy, National Oceanic and Atmospheric Administration, Mat-Su Salmon Partnership, and Alaska Pacific University.

This dataset contains lidar point clouds in LAS 1.2 format, originally classified in the following manner. Class 1: Unclassified Class 2: Ground, Class 3: Low Vegetation (less than 6 feet above ground surface), Class 4: Medium Vegetation (between 6 and 15 feet above ground surface), Class 5: High Vegetation (greater than 15 feet above ground surface), Class 6: Buildings, Class 7: Error Points, Class 8: Contour Keypoints, Class 9: Water, Class 10: Breakline proximity ground points, Class 11: Powerlines, Class 13: Noise (unclassifed data 1 foot or less above ground), Class 14: Bridge Deck. Classifications were modified slightly by changing class 10 to class 2 with user bytes set to 2, changing class 11 to 16, and changing class 13 to 15.

The following are the collection parameters and equipment used to create these data sets. The Leica sensor was used for flights in the northern half of the Core Area. All other flights were flown with Optech sensors.

Aircraft: Cessna 310(N7516Q), Piper Navajos (N6GR,T73TM and 812TB), Beechcraft KingAir (N898WW)

Lidar Systems: Optech ALTM Gemini (03SEN145 and 07SEN201) and Leica ALS 70

Approximate Collection Altitude (Above Mean Terrain): Optech--1400 meters, Leica--2200 meters

Ground Speed: Optech--150 kts, Leica--160 kts

Pulse Rate Frequency: Optech--70 kHz, Leica--163.6 kHz

Mirror Scan Frequency: Optech--40 Hz, Leica--41 Hz

Scan Angle (+/-): Optech--17 degrees, Leica--16 Degrees

Beam Divergence: Narrow (0.3 mrad)

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: Lidar Manager

Contact Org: Aerometric, Inc.

Title: Lidar Manager

Phone: (907) 272-4495

Email: aerometric@aerometric-ak.com

Purpose:

The purpose of this data set is to provide lidar-derived topographic data for the Matanuska-Susitna Borough.

Notes:

10167

Supplemental Information:

This data set was downloaded and modified from http://matsu.gina.alaska.edu. At the time of download, two small areas were not available and were listed for collection in 2012. A project summary can be found at

http://matsu.gina.alaska.edu/Project%20Wide/Project%20Documentation/MSB%20LiDAR%20Imagery%20Project%20Summary.pdf

Additional products are available through the matsu.gina.alaska.edu site, including general project information at:

http://matsu.gina.alaska.edu/Project%20Wide/

The survey report has also been made available at:

https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/2609/supplemental/ak2011_matsu_m2609_qc_survey_report.pdf

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

https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/2609/supplemental/ak2011_matsu_m2609.kmz

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords Earth Science > Land Surface > Topography > Terrain Elevation > Topographical Relief Maps
Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Coastal Processes > Coastal Elevation
ISO 19115 Topic Category elevation
ISO 19115 Topic Category oceans
None Bare-Earth
None Bathymetry/Topography
None Elevation
None Laser
None Lidar
None Remote Sensing
None Terrain
None Topography

Temporal Keywords

Thesaurus Keyword
None 2011
None 2012
None August
None May
None October

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords Continent > North America > United States Of America > Alaska
None Alaska
None Caswell Lakes
None Core
None Matanuska
None North Susitna
None Point MacKenzie
None USA
None Willow

Stratum Keywords

Thesaurus Keyword
None Class 14: Bridge Deck
None Class 15: Noise (unclassifed data 1 foot or less above ground)
None Class 16: Powerlines
None Class 18: May 24, 2011 data from the Matanuska Glacier withheld from ground/vegetation classification due to movement.
None Class 19: May 31, 2011 data from the Matanuska Glacier withheld from ground/vegetation classification due to movement.
None Class 1: Unclassified
None Class 2 with user byte 2: Breakline proximity ground points
None Class 26: May 13, 2011 data from the Knik Glacier withheld from ground/vegetation classification due to movement.
None Class 27: May 24, 2011 data from the Knik Glacier withheld from ground/vegetation classification due to movement.
None Class 28: August 26, 2011 data from the Knik Glacier withheld from ground/vegetation classification due to movement.
None Class 2: Ground
None Class 3: Low Vegetation (Less than 6 feet above ground surface)
None Class 4: Medium Vegetation (Between 6 and 15 feet above ground surface)
None Class 5: High Vegetation (More than 15 feet above ground surface)
None Class 6: Buildings
None Class 7: Error Points (Noise)
None Class 8: Contour Keypoints
None Class 9: Water

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: digital point data
Distribution Liability:

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

of Aerometric Inc., NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 622331
Date Effective From: 2012-06-27
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: 622333
Date Effective From: 2012-06-27
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: 622334
Date Effective From: 2012-06-27
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: 622332
Date Effective From: 2012-06-27
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: 622337
W° Bound: -150.758042
E° Bound: -147.236006
N° Bound: 62.900371
S° Bound: 61.229401

Extent Group 1 / Time Frame 1

CC ID: 622336
Time Frame Type: Range
Start: 2011-05-10
End: 2011-11-12

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=2609

;

Data Access Constraints:

Public

Data Use Constraints:

None

Distribution Information

Distribution 1

CC ID: 743621
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2609
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: 743622
Download URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/2609
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 743624
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 743625
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 622384
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 622383
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: 717596
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743623
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; lidarTools 1.0.9

Data Quality

Horizontal Positional Accuracy:

No horizontal accuracy verifications have been completed

Vertical Positional Accuracy:

Accuracies by area:

Core Area:

Tested 0.176 meters fundamental vertical accuracy at 95 percent confidence level in open terrain using RMSEz x 1.9600. Tested 0.307 meters supplemental vertical accuracy at 95th percentile in developed areas. Tested 0.400 meters supplemental vertical accuracy at 95th percentile in forested areas. Tested 0.331 meters supplemental vertical accuracy at 95th percentile in shrub areas. Tested 0.618 meters supplemental vertical accuracy at 95th percentile in wetlands areas. Tested 0.322 meters consolidated vertical accuracy at 95th percentile in: open terrain, developed, forest, shrub and wetlands areas.

Caswell Lakes: Data has not been verified using ground survey points.

Matanuska: Data has not been verified using ground survey points.

North Susitna: Data has not been verified using ground survey points.

Point MacKenzie: Data has not been verified using ground survey points.

Willow: Data has not been verified using ground survey points.

Completeness Measure:

Cloud Cover: 0

Completeness Report:

Not Complete

Conceptual Consistency:

Data has been verified using ground survey points collected by Lounsbury and Associates, Inc. and Aerometric, Inc.

Lineage

Sources

MatSu Point Clouds

CC ID: 622315
Contact Name: Aerometric
Publish Date: 2012-06-27
Extent Type: Range
Extent Start Date/Time: 2011-05-10
Extent End Date/Time: 2011-11-12
Source Contribution:

Aerometric | Source Geospatial Form: digital point data | Type of Source Media: online

Process Steps

Process Step 1

CC ID: 622316
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 provided to Aero-Metric by Lounsbury, Inc., and were referenced to NAD83 (CORS96) with GEOID09 derived orthometric heights. The maximum baseline distance for this area was 15 km, the average base line length was 5 km. The mean GPS positional accuracy for this area was +/- 0.06 meters.

Process Date/Time: 2011-10-12 00:00:00

Process Step 2

CC ID: 622317
Description:

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

Process Date/Time: 2011-10-12 00:00:00

Process Step 3

CC ID: 622318
Description:

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.

Process Date/Time: 2011-10-12 00:00:00

Process Step 4

CC ID: 622319
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: 2011-12-12 00:00:00

Process Step 5

CC ID: 622320
Description:

Manual classification of any data which appears to be properly classified using the automated methods.

Process Date/Time: 2012-04-15 00:00:00

Process Step 6

CC ID: 622321
Description:

Create point cloud data, by tile in LAS 1.2 format with absolute GPS timestamps

Process Date/Time: 2012-11-20 00:00:00

Process Step 7

CC ID: 622322
Description:

Data for the MatSu Bugoughs was downloaded from matsu.gina.alaska.edu/LiDAR for all areas available

Process Date/Time: 2013-11-26 00:00:00

Process Step 8

CC ID: 622323
Description:

Data were modified to work with the Digital Coast Data Access Viewer in the following ways: 1) projection was changed from Alaska State Plane to Geographic coordinates; 2) Vertical datum was changed from NAVD88 to NAD83 ellipsoid using NGS GEOID09; 3) the global encoding byte in LAS format was set to indicate adjusted GPS time instead of GPS seconds of the week; and 4) the classification table was modified to avoid classes already used as a standard within Digital Coast. The classification changes were for ground points near breaklines (original class 10 moved to class 2 with user byte set to 2), powerlines (original class 11 moved to class 16), and near ground noise (original class 13 moved to class 15). Data were also compressed to LAZ format using laszip from laszip.org. Data from multiple deliveries were combined and metadata rewritten to cover them all (Caswell Lakes, Core Area, Matanuska, North Susitna, Point MacKenzie, and Willow were the original delivery groups).

Process Date/Time: 2013-12-18 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) LAS

Catalog Details

Catalog Item ID: 48144
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 14:19+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-07-02 15:17+0000
Metadata Record Published: 2018-03-13
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-03-14