Fodar Digital Elevation Model of the Totatlanika River Corridor (Alaska) Acquired August 2021

Identification_Information:

Citation:

Citation_Information:

Originator: Adrian M. Bender (ORCID: 0000-0001-7469-1957)
Originator: Matt Nolan
Publication_Date: 20211203
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: Bender, A.M., Nolan, M., 2021, Fodar orthomosaic and digital elevation model of the Totatlanika River corridor (Alaska) acquired August 2021: U.S. Geological survey data release, https://doi.org/10.5066/P9K7CFRI

Online_Linkage: https://doi.org/10.5066/P9K7CFRI

Description:

Abstract:

This dataset provides a digital elevation model derived from airborne fodar data acquired in 2021 on August 31 over the Totatlanika River in central Alaska. The term "fodar" is a portmanteau of foto and lidar, coined by Matt Nolan, which describes a method of quantifying the color and elevation of Earth’s surface via airborne small-format digital camera photography.

Purpose:

This dataset was acquired for the purpose of mapping and quantifying surface processes (e.g., river incision, landslide erosion) along the Totatlanika River, which drains the minerally endowed and tectonically active northern Alaska Range. The 25 cm/cell elevation data that this data release provides are 25-fold higher resolution than the previously available 5 m/cell Alaska IfSAR digital elevation model.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20210831

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -148.87
East_Bounding_Coordinate: -148.35
North_Bounding_Coordinate: 64.24
South_Bounding_Coordinate: 63.95

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: Tectonic Landforms
Theme_Keyword: Faults
Theme_Keyword: Mountains
Theme_Keyword: Tectonic Processes
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:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ASC415

Place:

Place_Keyword_Thesaurus: USGS Geographic Names Information System
Place_Keyword: Totatlanika River
Place_Keyword: California Creek
Place_Keyword: Buzzard Creek
Place_Keyword: Alaska Range
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 contracted Fairbanks Fodar to collect high-resolution airborne fodar (photogrammetry) data that this digital elevation model and orthomosaic are derived from.

Native_Data_Set_Environment:

Environment as of date of Metadata Creation: Microsoft Windows 10 Version 20H2 (OS Build 19042.1288); Esri ArcGIS 10.8.1

Cross_Reference:

Citation_Information:

Originator: James V. Jones (ORCID: 0000-0002-6602-5935)
Originator: Douglas Kreiner (ORCID: 0000-0002-4405-1403)
Publication_Date: 2020
Title:

Tectonic and Metallogenic Evolution of the Yukon-Tanana Upland, Alaska

Geospatial_Data_Presentation_Form: Web site
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=436

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Real-world location accuracy of the fodar digital elevation model is expected to be within 2 cell values (i.e., within 0.5 meters).

Logical_Consistency_Report:

Logical consistency tests between the fodar digital elevation model and the IfSAR digital elevation model show a mean difference (IfSAR elevations subtracted from nearest fodar elevation) of 2.4 ± 2.9 m (1-sigma). Laser range finder measurements of landforms in the field (e.g., heights of river terrace treads above the active Totatlanika River, bank-full widths of the Totatlanika River) are consistent with point measurements on the fodar products.

Completeness_Report:

The digital elevation model and orthomosaic are complete representations of the surveyed area, without omission.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Fodar-derived raster data have horizontal accuracies within about two cell values.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

This digital elevation model was produced without surveyed ground control, but is expected to have a real-world accuracy of about 0.4 cm and contains elevation values within 2.4 ± 2.9 meters (mean, 1 standard deviation) of co-located elevations in the 5 m/cell Alaska IfSAR DEM.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Matt Nolan
Originator: Chris Larsen
Originator: Matthew Sturm
Publication_Date: 20150805
Title:

Mapping snow depth from manned aircraft on landscape scales at centimeter resolution using structure-from-motion photogrammetry

Geospatial_Data_Presentation_Form: journal article
Series_Information:

Series_Name: The Cryosphere
Issue_Identification: http://www.the-cryosphere.net/9/1445/2015/

Other_Citation_Details:

Full citation: Nolan, M., Larsen, C., and Sturm, M.: Mapping snow depth from manned aircraft on landscape scales at centimeter resolution using structure-from-motion photogrammetry, The Cryosphere, 9, 1445–1463, https://doi.org/10.5194/tc-9-1445-2015, 2015.

Online_Linkage: http://www.the-cryosphere.net/9/1445/2015/

Type_of_Source_Media: journal article
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20150805

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: (Nolan et al., 2015)
Source_Contribution:

Published documentation of methods used by Fairbanks Fodar to develop Totatlanika River fodar orthomosaic.

Process_Step:

Process_Description:

Airborne fodar survey - on 31 August 2021, Matt Nolan of Fairbanks Fodar conducted airborne fodar imagery over the Totatlanika River, Alaska for the USGS Alaska Science Center. Fodar acquisition involves multi-frequency GPS or GNSS in the aircraft that is synchronized within milliseconds with the camera trigger to locate photo centers with 10 cm or better precision. A complete fodar acquisition methods description is documented in (Nolan et al., 2015).

Source_Used_Citation_Abbreviation: (Nolan et al., 2015)
Process_Date: 20210831
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Fairbanks Fodar
Contact_Person: Matt Nolan

Contact_Address:

Address_Type: mailing
Address: PO Box 82416
City: Fairbanks
State_or_Province: Alaska
Postal_Code: 99708
Country: USA

Contact_Voice_Telephone: 907-978-0542
Contact_Electronic_Mail_Address: info@fairbanksfodar.com

Process_Step:

Process_Description:

Fodar digital elevation model preparation - Matt Nolan of Fairbanks Fodar processed airborne fodar imagery to generate a 25 cm/pixel digital elevation model (DEM) of the Totatlanika River, Alaska for the USGS Alaska Science Center. DEM preparation involves using photogrammetry software to process multi-frequency GPS or GNSS data synchronized with airborne photo datasets. A complete fodar data processing methods description is documented in (Nolan et al., 2015).

Source_Used_Citation_Abbreviation: (Nolan et al., 2015)
Process_Date: 20211005
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Fairbanks Fodar
Contact_Person: Matt Nolan

Contact_Address:

Address_Type: mailing
Address: PO Box 82416
City: Fairbanks
State_or_Province: Alaska
Postal_Code: 99708
Country: USA

Contact_Voice_Telephone: 907-978-0542
Contact_Electronic_Mail_Address: info@fairbanksfodar.com

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 134000
Column_Count: 98022

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 2011 UTM zone 6N GEOID12B
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -147.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.25
Ordinate_Resolution: 0.25

Planar_Distance_Units: meter

Geodetic_Model:

Horizontal_Datum_Name: GCS NAD83 2011
Ellipsoid_Name: GRS80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: orthometric height
Altitude_Resolution: 0.25
Altitude_Distance_Units: meter
Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: fodarTotatlanikaElevationUTM6_2021.tif
Entity_Type_Definition:

GeoTiff of fodar-derived digital elevation model of the Totatlanika River, Alaska, USA acquired 2021.

Entity_Type_Definition_Source: author defined

Attribute:

Attribute_Label: Value
Attribute_Definition: Orthometric height in meters
Attribute_Definition_Source: author defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 235.7
Range_Domain_Maximum: 1210.0
Attribute_Units_of_Measure: meters

Attribute_Value_Accuracy_Information:

Attribute_Value_Accuracy: 0.4
Attribute_Value_Accuracy_Explanation: (Nolan et al., 2015)

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: Unknown
Format_Specification: GeoTIFF
Format_Information_Content:

GeoTIFF format single band (elevation) and four-band (RGB color map) rasters. Included are metadata files in XML and HTML

File_Decompression_Technique: LZW compression.
Transfer_Size: 6000

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P9K7CFRI

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.

Fodar Digital Elevation Model of the Totatlanika River Corridor (Alaska) Acquired August 2021

Metadata: