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Short Citation:
OCM Partners, 2023: 2021 Barrow, AK Ultracam 4-Band 8 Bit Imagery, https://www.fisheries.noaa.gov/inport/item/67391.

Item Identification

Title: 2021 Barrow, AK Ultracam 4-Band 8 Bit Imagery
Status: Completed
Publication Date: 2022-08-22
Abstract:

This data set contains imagery of Barrow, Alaska collected in 2021.

Purpose:

The purpose of the imagery collect was to provide imagery for a number of Alaskan villages.

Supplemental Information:

This data consists of four bands of information with data values ranging from 0-255 with 0 being black and 255 for white. When 3 of the 4 bands is assigned to the appropriate colors of red, green, and blue, the pixel value shall determine the brightness of that particular color with the combination of the three providing the designated color image for the chosen band combination.

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
ISO 19115 Topic Category imageryBaseMapsEarthCover
None Barrow
None Digital Mapping Camera
None Digital Ortho rectified Image
None Ortho Rectification
None Village

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
Geographic Names Information System AK
Geographic Names Information System Alaska

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: Irregular
Data Presentation Form: Image (digital)
Entity Attribute Overview:

8-bit pixels, 4 band color(RGBIR) values 0 - 255

Entity Attribute Detail Citation:

None

Distribution Liability:

This data consists of four bands of information with data values ranging from 0-255 with 0 being black and 255 for white. When 3 of the 4 bands is assigned to the appropriate colors of red, green, and blue, the pixel value shall determine the brightness of that particular color with the combination of the three providing the designated color image for the chosen band combination.

Users must assume responsibility to determine the appropriate use of these data. DATA SHOULD NOT BE USED FOR LEGALLY BINDING APPLICATIONS.

Support Roles

Data Steward

CC ID: 1176074
Date Effective From: 2022-06-13
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: 1176076
Date Effective From: 2022-06-13
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: 1176077
Date Effective From: 2022-06-13
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: 1176075
Date Effective From: 2022-06-13
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: 1176089
W° Bound: -156.925
E° Bound: -156.24027777778
N° Bound: 71.40444444444
S° Bound: 71.18777777778

Extent Group 1 / Time Frame 1

CC ID: 1176088
Time Frame Type: Discrete
Start: 2021-08-04

Spatial Information

Spatial Representation

Representations Used

Grid: No

Reference Systems

Reference System 1

CC ID: 1176092

Coordinate Reference System

CRS Type: Projected
EPSG Code: EPSG:26904
EPSG Name: NAD83 / UTM zone 4N
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Access Policy:

Data is available for online custom download.

Data Access Constraints:

There are no limitations for access.

Distribution Information

Distribution 1

CC ID: 1176078
Start Date: 2022-08-22
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=9531
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2022-06-13 - Present)

Distribution 2

CC ID: 1176079
Start Date: 2022-08-22
End Date: Present
Download URL: https://coast.noaa.gov/htdata/raster2/imagery/BarrowAK_2021_9531
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2022-06-13 - Present)

Technical Environment

Description:

Unknown

Data Quality

Horizontal Positional Accuracy:

44 check point coordinates were measured to compare the aerotriangulated value of the points to their observed position in the mosaic to ensure the data meets horizontal accuracy requirement. The reported horizontal accuracy is 0.039 meter RMSE.

Completeness Report:

None

Lineage

Process Steps

Process Step 1

CC ID: 1176086
Description:

The imagery was acquired by Quantum Spatial Inc.

Aerial Photography Capture: A twin-engine aircraft with an on-board Intergraph frame-based digital mapping camera (DMC) was used to capture individual frames of imagery. The position and orientation of the aircraft was recorded at each exposure with the on-board global positioning system (GPS) and inertial measuring unit (IMU).

Aerotriangulation Process: The aerotriangulation was performed using the initial GPS/IMU data and was refined using conventional photogrammetric methods.

Orthorectification Process: Inpho OrthoMaster software was used to process the imagery to remove systematic and terrain distortions while also georeferencing it. The resulting output files were output with a ground sample distance (GSD) of 0.075 m.

Mosaic Process: Inpho OrthoVista software was used to color-balance, automatically generate seamlines, and mosaic the individual orthophotos into user defined mosaic tiles.

Tile Review: The mosaicked tiles were each individually panned through and errors/blemishes in seamline generation and color balance are removed by manual methods. This data set was also compared to imagery previously collected, processed, and delivered to the client in order to shift the overall color cast of the current imagery to better resemble the legacy data.

Header Creation and Horizontal Checks: The mosaic tiles have their georeferencing information assigned into the headers of the tiles creating full geotiffs. The tiles are then checked for horizontal positioning utilizing ground control.

Process Date/Time: 2021-10-07 00:00:00

Catalog Details

Catalog Item ID: 67391
GUID: gov.noaa.nmfs.inport:67391
Metadata Record Created By: Erik Hund
Metadata Record Created: 2022-06-13 18:27+0000
Metadata Record Last Modified By: Erik Hund
Metadata Record Last Modified: 2022-08-22 18:10+0000
Metadata Record Published: 2022-08-22
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-08-22
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-08-22