Combined High-Resolution Topography and Bathymetry for Western Passage Canal, Near Whittier, Alaska

Identification_Information:

Citation:

Citation_Information:

Originator: Haeussler, Peter J. (ORCID: 0000-0002-1503-6247)
Originator: Labay, Keith A. (ORCID: 0000-0002-6763-3190)
Publication_Date: 20220121
Title:

Geospatial_Data_Presentation_Form: raster and vector digital data
Publication_Information:

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

Other_Citation_Details:

Suggested Citation: Haeussler, P.J., Labay, K.A., 2022, Combined high-resolution topography and bathymetry for western Passage Canal, near Whittier, Alaska: U.S. Geological Survey Data Release, https://doi.org/10.5066/P9L0Q0AK

Online_Linkage: https://doi.org/10.5066/P9L0Q0AK
Larger_Work_Citation:

Citation_Information:

Originator: U.S. Geological Survey, Alaska Science Center
Publication_Date: 2007
Title: Alaska Earthquake Hazards
Geospatial_Data_Presentation_Form: website
Series_Information:

Series_Name: Alaska 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 is a new Digital Elevation Model (DEM) using the best available high-resolution topography and bathymetry surrounding the area of Whittier, Alaska. We utilized three datasets (1) LiDAR topography collected by the Alaska Division of Geological and Geophysical Surveys (DGGS) in 2012, (2) multibeam echosounder system (MBES) survey of western Passage Canal collected by the USGS in the summer of 2011 (3) and NOAA single-beam soundings collected from September 26-October 18, 1995.

Purpose:

This data was produced to aid in tsunami modeling of the region and to aid in understanding landscape change, above and below sea level.

Supplemental_Information:

These datasets were placed into a common coordinate system, horizontal datum, and vertical datum prior to being merged. The projected coordinate system of Universal Transverse Mercator zone 6 World Geodetic System of 1984 (WGS84) was used for the horizontal coordinates. Z-values in meters were referenced to the tidal datum of Mean Higher High Water. Gaps between the datasets were interpolated to create the final seamless five-meter grid covering the area of interest around Whittier, Alaska.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19950926
Ending_Date: 20121025

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -145.9
East_Bounding_Coordinate: -148.4
North_Bounding_Coordinate: 60.9
South_Bounding_Coordinate: 60.8

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ASC430

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: elevation

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: bathymetry and elevation

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: topography
Theme_Keyword: LiDAR
Theme_Keyword: multibeam sonar
Theme_Keyword: single-beam echo sounder
Theme_Keyword: land surface characteristics

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: multibeam echo sounder

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Alaska Science Center
Theme_Keyword: ASC

Place:

Place_Keyword_Thesaurus: USGS Geographic Names Information System (GNIS)
Place_Keyword: Alaska
Place_Keyword: Passage Canal
Place_Keyword: Prince William Sound
Place_Keyword: Whittier

Access_Constraints: None
Use_Constraints:

It is requested that the authors and the USGS Alaska Science Center be cited for any subsequent publications that reference this dataset. This information is not intended for navigation purposes.

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: 4210 University Drive
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99508
Country: USA

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

Cross_Reference:

Citation_Information:

Originator: Parsons, Thomas
Publication_Date: 2011
Title: Field Activity Details for field activity A0111GA
Geospatial_Data_Presentation_Form: document
Publication_Information:

Publication_Place: online
Publisher:

U.S. Geological Survey, Coastal and Marine Hazards and Resources Program (CMHRP) Pacific Coastal and Marine Science Center

Online_Linkage: https://cmgds.marine.usgs.gov/fan_info.php?fan=A0111GA

Cross_Reference:

Citation_Information:

Originator: Haeussler, P.J.
Originator: Parsons, T.
Originator: Finlayson, D.P.
Originator: Hart, P.
Originator: Chaytor, J.D.
Originator: Ryan, H.
Originator: Lee, H.
Originator: Labay, K.
Originator: Peterson, A.
Originator: Liberty, L.
Publication_Date: 2014
Title:

New Imaging of Submarine Landslides from the 1964 Earthquake Near Whittier, Alaska, and a Comparison to Failures in Other Alaskan Fjords

Geospatial_Data_Presentation_Form: book chapter
Series_Information:

Series_Name:

Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research

Issue_Identification: 37:361-370

Publication_Information:

Publication_Place: online
Publisher: Springer, Cham

Other_Citation_Details:

Haeussler, P.J., Parsons, T., Finlayson, D.P., Hart, P., Chaytor, J.D., Ryan, H., Lee, H., Labay, K., Peterson, A., Liberty, L. 2014. New Imaging of Submarine Landslides from the 1964 Earthquake Near Whittier, Alaska, and a Comparison to Failures in Other Alaskan Fjords. In: Krastel S. et al. (eds) Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research 37:361-370 Springer, Cham doi:10.1007/978-3-319-00972-8_32

Online_Linkage: https://doi.org/10.1007/978-3-319-00972-8_32

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

We compared the multibeam data to 1995 NOAA hydrographic surveys H10655 and H10653, which were conventional single-beam surveys with a vertical datum of MLLW. Based on the original filename of the multibeam survey we inferred the vertical datum was NAVD88. However, we found the multibeam data was deeper than the 1995 surveys by a median value of 5.2 m, or 3 to 4 m in relatively flat areas of the surveys. Areas where the multibeam data was shallower could be found in places of expected change such as off river or stream mouths. A check of the original Caris project files used to generate the multibeam survey provided evidence that the vertical datum was likely MLLW rather than NAVD88. In this report, we assume the datum was MLLW. For other surveys see their respective metadata.

Logical_Consistency_Report:

The data were examined for outliers and none were found. No formal logical accuracy tests were conducted.

Completeness_Report:

Each of the three datasets that were assembled to make this dataset have different levels of completeness.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

A formal accuracy assessment of the horizontal positional information in the dataset has not been conducted. Accuracy may be lower than source datasets due to the datum transformations and interpolation needed to combine data sources.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Hubbard, T.D.
Originator: Wolken, G.J.
Originator: Stevens, D.S.P.
Originator: Combellick, R.A.
Publication_Date: 2013
Title:

High-resolution lidar data for the Whittier area, Passage Canal, and Portage Lake, Alaska

Geospatial_Data_Presentation_Form: raster digital data
Series_Information:

Series_Name: Raw Data File
Issue_Identification: RDF 2013-3

Publication_Information:

Publication_Place: Fairbanks, AK, USA
Publisher: Alaska Division of Geological and Geophysical Surveys

Other_Citation_Details:

Hubbard, T.D., Wolken, G.J., Stevens, D.S.P., and Combellick, R.A., 2013, High-resolution lidar data for the Whittier area, Passage Canal, and Portage Lake, Alaska: Alaska Division of Geological and Geophysical Surveys Raw Data File 2013-3, 5 p. https://doi.org/10.14509/24976

Online_Linkage: https://doi.org/10.14509/24976

Type_of_Source_Media: ESRI Grid
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20121021
Ending_Date: 20121025

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: LiDAR
Source_Contribution: Topography surrounding Whittier and Passage Canal

Source_Information:

Source_Citation:

Citation_Information:

Originator: Finlayson, D.
Publication_Date: Unpublished material
Title: Passage Canal 5-meter multibeam data
Geospatial_Data_Presentation_Form: raster digital data

Type_of_Source_Media: Bathymetric Attributed Grid (BAG)
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20110815
Ending_Date: 20110822

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: 5MMB
Source_Contribution:

This is the source for swath bathymetry in the dataset, typically below 20 m water depth

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Hydrographic Surveys Division, Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce

Publication_Date: 1995
Title:

H10653: NOS Hydrographic Survey, Prince William Sound, Alaska, 1995-10-18

Geospatial_Data_Presentation_Form: tabular digital data

Type_of_Source_Media: ASCII XYZ
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19950926
Ending_Date: 19951018

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: H10653
Source_Contribution:

Passage Canal bathymetry east of 148 degrees 39 minutes west not covered by 5MMB.

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Hydrographic Surveys Division, Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce

Publication_Date: 1995
Title:

H10655: NOS Hydrographic Survey, Prince William Sound, Alaska, 1995-10-18

Geospatial_Data_Presentation_Form: tabular digital data

Type_of_Source_Media: ASCII XYZ
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19951008
Ending_Date: 19951018

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: H10655
Source_Contribution:

Passage Canal bathymetry west of 148 degrees 39 minutes west not covered by 5MMB.

Process_Step:

Process_Description:

In 2011 the USGS research vessel Alaskan Gyre mapped in Passage Canal, Alaska, using a Reson 7111 multibeam echosounder. USGS processed the bathymetry data post-cruise. The survey line files were imported into Caris HIPS and SIPS software for processing. Water column sound velocity data that was collected throughout the survey was applied to the bathymetry data. The data were cleaned of spurious soundings and the soundings were gridded into 5-m CUBE surface in Caris 7.1.1 and exported the data as a BAG surface. The dataset was converted from BAG format into GeoTIFF format using ArcGIS 10.0.2.

Source_Used_Citation_Abbreviation: 5MMB
Process_Date: 20120731

Process_Step:

Process_Description:

Datum was then transformed from WGS84 into NAD83 using ArcGIS 10.0.2 for use with other local datasets in NAD83. Original projection of UTM 6 remained unchanged.

Source_Used_Citation_Abbreviation: 5MMB
Process_Date: 20121115

Process_Step:

Process_Description:

Used bicubic interpolation to fill some small gaps within the dataset. The largest area filled was less than 4000 meters squared. Larger gaps still remain within the data. Processing was done using Global Mapper 20.1.

Source_Used_Citation_Abbreviation: 5MMB
Process_Date: 20210721

Process_Step:

Process_Description:

Using Global Mapper 20.1 the horizontal datum was transformed to WGS84 and the vertical datum was adjusted to MHHW by making the depth values 3.715 m deeper as determined by the Whittier tide gauge station 9454949. The modified source data was exported to a temporary XYZ file.

Source_Used_Citation_Abbreviation: 5MMB
Process_Date: 20211210

Process_Step:

Process_Description:

NOAA single-beam source datasets provided as two XYZ files in geographic coordinates with a horizontal datum of WGS84 and a vertical datum of MLLW. Using Global Mapper 20.1 the points were reprojected to UTM6 and the horizontal datum was transformed to WGS84. The modified source data was exported to a temporary shapefile.

Source_Used_Citation_Abbreviation: H10653 & H10655
Process_Date: 20211210

Process_Step:

Process_Description:

Using ArcGIS 10.8.1 points that overlapped with the LiDAR or multibeam datasets were deleted. The vertical datum was adjusted to MHHW by making the depth values 3.715 m deeper as determined by the Whittier tide gauge station 9454949.

Source_Used_Citation_Abbreviation: H10653 & H10655
Process_Date: 20211210

Process_Step:

Process_Description:

LiDAR source datasets provided as three ESRI grids with a projection of UTM6 NAD83 and a vertical datum of NAVD88. Using Global Mapper 20.1 the horizontal datum was transformed to WGS84 and the vertical datum was adjusted to MHHW by lowering the elevation values 3.395 m as determined by the Whittier tide gauge station 9454949. Returns from the ocean's surface near the coastline were masked using an extent polygon with a coastline digitized from the LiDAR. The modified source data was exported to a temporary XYZ file.

Source_Used_Citation_Abbreviation: LiDAR
Process_Date: 20211210

Process_Step:

Process_Description:

The three temporary files were added to Global Mapper 20.1 and used to generate a temporary TIN. This TIN was used to create the final accompanying zipped GeoTIFF. Bathymetric values east of the multibeam extent were masked from the final GeoTIFF. This GeoTIFF was also reprojected to geographic coordinates in WGS84 using the Project Raster tool in ArcGIS 10.8.1. and exported as an ASCII grid file using the Raster to ASCII tool in ArcGIS 10.8.1. The no data value in the ASCII grid is the default -9999.

Process_Date: 20211210

Process_Step:

Process_Description:

The coastline for Passage Canal was digitized from the LiDAR dataset using ArcGIS 10.8.1.

Source_Used_Citation_Abbreviation: LIDAR
Process_Date: 20211210

Process_Step:

Process_Description:

Extent polygons for the three raster data sources were created in Global Mapper 20.1.

Process_Date: 20211210

Process_Step:

Process_Description:

Using ArcGIS 10.8.1 the digitized coastline was used to define the boundary between the LiDAR and 1995 bathymetry polygons. The polygons were then combined using the Union tool to create the final dataset.

Process_Date: 20211210
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Keith Labay
Contact_Organization: U.S. Geological Survey, Alaska Science Center

Contact_Position: Physical Scientist
Contact_Address:

Address_Type: Mailing and Physical
Address: 4210 University Dr.
City: Anchorage
State_or_Province: AK
Postal_Code: 99508

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

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 2573
Column_Count: 5118

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: 0.0
False_Easting: 500000
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 5
Ordinate_Resolution: 5

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic System 1984
Ellipsoid_Name: Geodetic Reference System 1980
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.2572

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: Mean Higher High Water
Altitude_Resolution: 5
Altitude_Distance_Units: meters
Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Depth_System_Definition:

Depth_Datum_Name: Mean higher high water
Depth_Resolution: 5
Depth_Distance_Units: meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: PassageCanal_topobathy_UTM6_WGS84.tif
Entity_Type_Definition: Values associated with GeoTIFF raster dataset
Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: Value
Attribute_Definition: Depth in meters to the seabed
Attribute_Definition_Source: this dataset
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -361.6
Range_Domain_Maximum: 1377.5
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: Value
Attribute_Definition: No data value
Attribute_Definition_Source: this dataset
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -32767
Enumerated_Domain_Value_Definition: No data
Enumerated_Domain_Value_Definition_Source: Author defined

Detailed_Description:

Entity_Type:

Entity_Type_Label: PassageCanal_topobathy_WGS84.asc
Entity_Type_Definition: Values associated with ASCII grid raster dataset
Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: Value
Attribute_Definition: Depth in meters to the seabed
Attribute_Definition_Source: this dataset
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -359.7
Range_Domain_Maximum: 1376.1
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: Value
Attribute_Definition: No data value
Attribute_Definition_Source: this dataset
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -9999
Enumerated_Domain_Value_Definition: No data
Enumerated_Domain_Value_Definition_Source: Author defined

Detailed_Description:

Entity_Type:

Entity_Type_Label: PassageCanal_dataextents
Entity_Type_Definition:

Vector polygons depicting the extents of the raster data sources. Presented in both ESRI shapefile (SHP) and Keyhole Markup Language (KML) formats. For convenience, also presented as a 'browse image' in PDF format.

Entity_Type_Definition_Source: Author defined

Attribute:

Attribute_Label: SOURCE
Attribute_Definition: Name of raster data source
Attribute_Definition_Source: this dataset
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BATHYMETRY_1995
Enumerated_Domain_Value_Definition: Extent of NOAA single-beam bathymetry
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: LIDAR
Enumerated_Domain_Value_Definition: Extent of LiDAR topography
Enumerated_Domain_Value_Definition_Source: Author defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: MULTIBEAM
Enumerated_Domain_Value_Definition: Extent of multibeam bathymetry
Enumerated_Domain_Value_Definition_Source: Author defined

Overview_Description:

Entity_and_Attribute_Overview:

This dataset contains topography and bathymetry for the western part of Passage Canal near the city of Whittier, Alaska. Values are in meters and measured relative to Mean Higher High Water.

Entity_and_Attribute_Detail_Citation: Author defined

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: 4210 University Drive
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99508
Country: USA

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

Resource_Description:

The U.S. Geological Survey, Alaska Science Center is the authoritative source and distributor of these 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, no warranty expressed or implied is made regarding the display or utility of the data for other purposes or on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: GeoTIFF, ASCII, SHP, KML
Format_Information_Content:

Data are distributed in a Zip package containing data in: (1) GeoTIFF with an accompanying optional .TFW world file, (2) ASCII grid with an accompanying required .PRJ projection file, (3) ESRI shapefile, and (4) Keyhole Markup Language formats, with FGDC metadata in XML and HTML formats.

File_Decompression_Technique:

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

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P9L0Q0AK

Fees: None

Technical_Prerequisites:

It is recommended that GIS software such as the free open source program QGIS be used to work with this data.

Combined High-Resolution Topography and Bathymetry for Western Passage Canal, Near Whittier, Alaska

Metadata: