Airborne Lidar-based Digital Elevation Models of Coastal Montague Island (Alaska) Acquired September 2018

Identification_Information:

Citation:

Citation_Information:

Originator: Robert C. Witter (ORCID: 0000-0002-1721-254X)
Originator: Adam L. LeWinter
Originator: Dominic L. Filiano
Originator: Peter J. Haeussler (ORCID: 0000-0002-1503-6247)
Originator: Adrian M. Bender (ORCID: 0000-0001-7469-1957)
Publication_Date: 20201008
Title:

Geospatial_Data_Presentation_Form: raster digital data
Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

Suggested citation: Witter, R.C., LeWinter, A.L., Filiano, D., Haeussler, P.J., Bender, A.M., 2020, Airborne lidar-based digital elevation models of coastal Montague Island (Alaska) acquired September 2018: U.S. Geological survey data release, https://doi.org/10.5066/P9FLQROT

Online_Linkage: https://doi.org/10.5066/P9FLQROT
Larger_Work_Citation:

Citation_Information:

Originator: Robert C. Witter
Publication_Date: 2018
Title:

Alaska Earthquake and Tsunami Hazards - Alaska-Aleutian Subduction Zone Studies

Geospatial_Data_Presentation_Form: Web site
Series_Information:

Series_Name: Science Portal
Issue_Identification: 33

Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

This is a link to the broader USGS Alaska Science Center research project supported by these data. Users will find a description of the research project and links to associated reports, publications, and data products.

Online_Linkage: https://alaska.usgs.gov/portal/project.php?project_id=33

Description:

Abstract:

This dataset provides a digital elevation model mosaic derived from airborne lidar data acquired in 2018 from September 2–3 over eight separate areas along Alaska's Montague Island coast, between Prince William Sound and the Gulf of Alaska.

Purpose:

During the 1964 Great Alaska earthquake (magnitude 9.2), several megathrust splay faults including the Patton Bay Fault beneath Montague Island ruptured, raising the island by up to 10 meters and producing tsunami waves. These lidar-based digital elevation models facilitate detailed geomorphic study of the coastal landscape resulting from the 1964 earthquake, and from island uplift during ancient earthquakes. These studies characterize earthquake location, recurrence, and magnitude, and will contribute essential information to the U.S. Geological Survey National Seismic Hazard Map.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20180902
Ending_Date: 20180903

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -147.92
East_Bounding_Coordinate: -147.23
North_Bounding_Coordinate: 60.20
South_Bounding_Coordinate: 59.79

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: elevation
Theme_Keyword: imageryBaseMapsEarthCover

Theme:

Theme_Keyword_Thesaurus: NASA GCMD Earth Science Keywords
Theme_Keyword: Earth Science
Theme_Keyword: Land Surface
Theme_Keyword: Topography
Theme_Keyword: Terrain Elevation
Theme_Keyword: Digital Elevation/Terrain Model (DEM)
Theme_Keyword: Geomorphic Landforms/Processes
Theme_Keyword: Coastal Landforms
Theme_Keyword: Estuaries
Theme_Keyword: Headlands/Bays/Cape
Theme_Keyword: Wave-Cut Notch/Platforms
Theme_Keyword: Coastal Processes
Theme_Keyword: Sea Level Changes
Theme_Keyword: Tectonic Landforms
Theme_Keyword: Faults
Theme_Keyword: Mountains
Theme_Keyword: Tectonic Processes
Theme_Keyword: Isostatic Uplift
Theme_Keyword: Orogenic Movement
Theme_Keyword: Tectonic Uplift

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: Geomorphology
Theme_Keyword: Topography
Theme_Keyword: Geospatial Datasets
Theme_Keyword: Land surface characteristics
Theme_Keyword: Tectonic processes
Theme_Keyword: Lidar

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ASC317

Place:

Place_Keyword_Thesaurus: USGS Geographic Names Information System
Place_Keyword: Montague Island
Place_Keyword: Strike Creek
Place_Keyword: MacLeod Harbor
Place_Keyword: Patton Bay
Place_Keyword: San Juan Bay
Place_Keyword: Fault Cove
Place_Keyword: Montague Strait
Place_Keyword: Prince William Sound
Place_Keyword: Gulf of Alaska
Place_Keyword: Alaska

Access_Constraints: None
Use_Constraints:

It is requested that the authors and the USGS Alaska Science Center be cited for any subsequent publications referenced to this dataset.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Alaska Science Center

Contact_Address:

Address_Type: mailing and physical address
Address: 4210 University Drive
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99508
Country: United States

Contact_Voice_Telephone: 907-786-7000
Contact_Facsimile_Telephone: 907-786-7020
Contact_Electronic_Mail_Address: ascweb@usgs.gov

Data_Set_Credit:

The USGS collaborated with the Army Corps of Engineers' Cold Regions Research and Engineering Laboratory (CRREL) to collect high-resolution airborne lidar (Light and Distance Ranging) data that these digital elevation models are derived from.

Native_Data_Set_Environment:

Environment as of date of Metadata Creation: Microsoft Windows 7 Version 6.2 (Build 9200); Esri ArcGIS 10.7.0.10450

Cross_Reference:

Citation_Information:

Originator: Robert C. Witter
Originator: Peter J. Haeussler
Originator: Adrian M. Bender
Publication_Date: 2018
Title:

Alaska Earthquake and Tsunami Hazards - Alaska-Aleutian Subduction Zone Studies

Geospatial_Data_Presentation_Form: Web site
Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey, Alaska Science Center

Other_Citation_Details:

Online_Linkage:

https://www.usgs.gov/centers/asc/science/alaska-aleutian-subduction-zone-studies

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The raster file attribute values are elevations in meters gridded in 0.5 square meter pixels. The gridded elevation values are derived from final laser (lidar) returns, which located elevation values and horizontal positions within +/-10 cm based on post-processing described in "process steps". The 0.5 square m/pixel gridded lidar-based elevations agree with spatially overlapping elevation values housed in radar (IfSAR)-based digital elevation models comprising elevation values gridded in 5 square meter pixels.

Logical_Consistency_Report:

Anomalous point elevation values were removed using spike and sink removal algorithms, and holes in the data within the 0.5 square m/pixel resolution were repaired during kriging-based final raster generation.

Completeness_Report:

These DEMs are derived from the last-return lidar point clouds, and omit other laser return points (e.g., from vegetation cover), to represent the bare earth topographic surface of eight lidar survey areas along the coast of Alaska's Montague Island.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Laser (lidar) returns located elevation values with horizontal positions and elevation within +/-0.10 meters based on post-processing described in Process Steps.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Adam L. LeWinter
Publication_Date: 20190430
Title:

United States Army Corps of Engineers Cold Regions Research & Engineering Laboratory Remote Sensing and GIS Center of Expertise

Online_Linkage: https://www.erdc.usace.army.mil/Locations/CRREL/

Type_of_Source_Media: online
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20180902
Ending_Date: 20180903

Source_Currentness_Reference: Ground condition

Source_Citation_Abbreviation: USACE-CRREL RS/GIS CX
Source_Contribution:

Airborne lidar surveys and data processing for digital elevation model generation.

Process_Step:

Process_Description:

Airborne lidar survey - between September 2nd and 3rd, 2018 the lidar group from the Remote Sensing and Geographic Information Systems Center of Expertise (RSGIS CX) at the Cold Regions Research and Engineering Laboratory (CRREL) conducted airborne LiDAR and electro-optical (EO) imagery surveys over 8 areas of interest (AOI) on Montague Island, Alaska for the USGS Alaska Science Center. CRREL used their HeliPod system installed on a Robinson R44 Raven II helicopter, consisting of: Reigl LMS VQ-480i laser scanner; Hasselblad A6-D aerial mapping camera; iXBlue ATLANS-C inertial navigation system (INS); and NexTrack2 flight management system (FMS). The aircraft is owned and operated by Alpine Air Alaska, based out of Girdwood, Alaska. The CRREL team completed two successful days of flights, basing out of Girdwood, AK. Each day the team of two (pilot and system operator) landed on the island to setup a temporary base station (Trimble R10) to be used in post-processing kinematic corrections of the aircraft trajectories. All flights were flown at a target AGL of 500 m and airspeed of 60-knots. Coincident EO imagery was collected at 1.5Hz during LiDAR data logging.

Source_Used_Citation_Abbreviation: USACE-CRREL RS/GIS CX
Process_Date: 20180903

Process_Step:

Process_Description:

Post-survey processing of lidar data and digital elevation model generation - The post-processing workflow followed these general steps: (1) Download laser scanner, INS, and camera data from the acquisition laptop and/or sensors, (2) Download base station data from the GNSS receiver (Trimble R10), (3) Post-process the base station receivables to determine base station position using National Geodetic Survey’s Online User Positioning Service software (OPUS), (4) Calculate GNSS antenna to IMU lever arm values using Inertial Explorer software, (5) Post-process the GNSS/INS trajectory against the base station receivables to determine a Smoothed Best Estimate of Trajectory (SBET) using iXBlue ATLANS- Post-Processing Software (APPS), (6) Post-process the laser scanner data against the SBET to create a point cloud using the Riegl RiPROCESS software suite, (7) Manually clean any noise points above or below the ground surface using the Riegl RiPROCESS software suite, (8) Export the point cloud from the post-processing software into a deliverable file format (LAZ) using the Riegl RiPROCESS software suite, (9) Process bare earth DEM products for all AOIs using the Point Data Abstraction Library software, (10) Use the National Oceanic and Atmospheric Administration online vertical datum transformation tool VDATUM (https://vdatum.noaa.gov/) to transform the DEMs from NAD83(2011 Epoch 2010.00)/GRS80 ellipsoid heights to NAVD88 orthometric heights using geoid model GEOID12B.

Source_Used_Citation_Abbreviation: USACE-CRREL RS/GIS CX
Process_Date: 20190430

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 90603
Column_Count: 76822

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 6
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -147.0
Latitude_of_Projection_Origin: 0
False_Easting: 500000.0
False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.5
Ordinate_Resolution: 0.5

Planar_Distance_Units: meter

Geodetic_Model:

Horizontal_Datum_Name: GCS NAD83 2011
Ellipsoid_Name: GRS80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 1.0
Altitude_Distance_Units: meters
Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Alaska Science Center

Contact_Address:

Address_Type: Mailing and physical address
Address: 4210 University Drive
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99508
Country: U.S.A.

Contact_Voice_Telephone: 907-786-7000
Contact_Facsimile_Telephone: 907-786-7020
Contact_Electronic_Mail_Address: ascweb@usgs.gov

Resource_Description: Authoritative source for data.
Distribution_Liability:

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: TIFF
Format_Version_Number: see Format Specification
Format_Specification: GeoTIFF
Format_Information_Content:

Data are distributed in a Zip package containing data in GeoTIFF format and FGDC metadata in XML and HTML formats.

File_Decompression_Technique:

Compression applied by the 7-Zip utility using default compression (5). The file can be decompressed and unpacked by open source or commercially available unzip tools.

Transfer_Size: 2000

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P9FLQROT

Fees: None. No fees are applicable for obtaining the dataset.

Technical_Prerequisites:

It is recommended that a geographic information system or other native GeoTIFF viewer be used to view the elevation raster.

Airborne Lidar-based Digital Elevation Models of Coastal Montague Island (Alaska) Acquired September 2018

Metadata: