2011 USGS NOAA USACE Lidar: Matanuska-Susitna Borough, AK

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 was originally in LAS 1.2 format with a non-standard class table. The format and the class table has been changed. Details are in the processing steps.

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

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

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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/

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.

This data can be obtained on-line at the following URL:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2609

;

Public

None

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

No horizontal accuracy verifications have been completed

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.

Cloud Cover: 0

Not Complete

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