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Short Citation:
National Centers for Coastal Ocean Science, 2022: Estimated Depth Maps of the Northwestern Hawaiian Islands Derived from High Resolution IKONOS Satellite Imagery, https://www.fisheries.noaa.gov/inport/item/39306.

Item Identification

Title: Estimated Depth Maps of the Northwestern Hawaiian Islands Derived from High Resolution IKONOS Satellite Imagery
Short Name: est_depth_nwhi
Status: Completed
Publication Date: 2002-12-31
Abstract:

Estimated shallow-water, depth maps were produced using rule-based, semi-automated image analysis of high-resolution satellite imagery for nine locations in the Northwestern Hawaiian Islands. This project is a cooperative effort among the National Oceanic and Atmospheric Administration, State of Hawaii Department of Land and Natural Resources, and the U.S. Fish and Wildlife Service to produce benthic habitat maps and georeferenced imagery for the Northwestern Hawaiian Islands. This project was conducted in support of the U.S. Coral Reef Task Force.

Purpose:

This project was conducted in support of the U.S. Coral Reef Task Force http://www.coris.noaa.gov

Notes:

564

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
ISO 19115 Topic Category environment
ISO 19115 Topic Category oceans
None bathymetry/topography
None coral
None environmental monitoring
None estimated depth
None oceans
None reef
None satellite imagery

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None French Frigate Shoals
None Gardner Pinnacles
None Kure Atoll
None Laysan Island
None Lisianski Island
None Maro Reef
None Midway Atoll
None Necker Island
None Nihoa Island
None Northwestern Hawaiian Islands
None Pearl and Hermes Atoll
None United States

Physical Location

Organization: National Centers for Coastal Ocean Science
City: Silver Spring
State/Province: MD

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: raster digital data
Entity Attribute Overview:

Estimated depth (estimated water depths in feet) were assigned either a range of numeric values or a single numeric value representative of (but not equal to) depth. These individual numeric values or ranges of numeric values were used to apply a ramped RGB color palette. Because the environment in the NWHI is very complex, two profiles of estimated depth were generated. Deep-water locations (Lisianski Island, Laysan Island, Maro Reef, Necker Island, and Nihoa Island). RESULTS = min_depth,max_depth,red_color_value,green_color_value,blue_color_value_,0,255,255,2551,2,243,251,2553,4,227,244,2555,6,211,238,2557,8,195,231,2559,10,179,225,25511,12,162,219,25513,14,146,212,25515,16,130,206,25517,18,118,201,255_,19,102,195,25520,21,85,188,25522,23,69,182,25524,25,53,175,25526,27,37,169,25528,29,21,162,25530,31,5,156,25532,33,0,151,25534,35,0,145,25236,37,0,138,246_,38,0,132,24139,40,0,126,23641,42,0,119,23043,44,0,113,22545,46,0,106,21947,48,0,102,21549,50,0,95,21051,52,0,89,20453,54,0,82,199_,55,0,76,19356,57,0,69,18858,59,0,63,18360,61,0,57,17762,63,0,50,17264,65,0,45,16866,67,0,39,16268,69,0,33,15770,71,0,26,15172,73,0,20,146_,74,0,13,14175,76,0,7,13577,78,0,0,13079,80,0,0,12681,82,0,0,12083,84,0,0,11585,92,0,0,10993,99,0,0,100100,109,0,0,100110,111,0,0,95112,116,0,0,95117,127,0,0,90128,138,0,0,90139,143,0,0,90144,200,0,0,90201,240,0,0,0241,241,40,0,100242,249,0,0,0_,250,167,133,119251,255,0,0,0. Shallow-water locations (Kure Atoll, Midway Atoll, Pearl and Hermes Atoll, and French Frigate Shoals). RESULTS = min_depth,max_depth,red_color_value,green_color_value,blue_color_value,_,0,255,255,255,_,1,243,251,255,_,2,227,244,255,_,3,211,238,255,_,4,195,231,255,_,5,179,225,255,_,6,162,219,255,_,7,146,212,255,_,8,130,206,255,_,9,118,201,255,_,10,102,195,255,_,11,85,188,255,_,12,69,182,255,_,13,53,175,255,_,14,37,169,255,_,15,21,162,255,_,16,5,156,255,_,17,0,151,255,_,18,0,145,252,_,19,0,138,246,_,20,0,132,241,_,21,0,126,236,_,22,0,119,230,_,23,0,113,225,_,24,0,106,219,_,25,0,102,215,_,26,0,95,210,_,27,0,89,204,_,28,0,82,199,_,29,0,76,193,_,30,0,69,188,_,31,0,63,183,_,32,0,57,177,_,33,0,50,172,_,34,0,45,168,_,35,0,39,162,_,36,0,33,157,_,37,0,26,151,_,38,0,20,146,_,39,0,13,141,_,40,0,7,135,_,41,0,0,130,_,42,0,0,126,_,43,0,0,120,_,44,0,0,115,45,48,0,0,109,49,52,0,0,100,53,57,0,0,92,58,62,0,0,85,63,68,0,0,80,69,75,0,0,72,76,80,0,0,65,81,85,0,0,60,86,92,0,0,55,93,200,0,0,50,201,240,0,0,0,241,241,40,0,100,242,249,0,0,0,250,167,133,119,251,255,0,0,0

Distribution Liability:

Not to be used for navigation.

Data Set Credit: NOAA, University of Hawaii, U.S. Fish and Wildlife Service

Support Roles

Data Steward

CC ID: 465143
Date Effective From: 2002-12-31
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Distributor

CC ID: 465145
Date Effective From: 2002-12-31
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Metadata Contact

CC ID: 465146
Date Effective From: 2002-12-31
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Point of Contact

CC ID: 465144
Date Effective From: 2002-12-31
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Principal Investigator

CC ID: 465147
Date Effective From: 2002-12-31
Date Effective To:
Contact (Person): Stumpf, Richard
Email Address: richard.stumpf@noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 465150
W° Bound: -179
E° Bound: -160
N° Bound: 29
S° Bound: 22

Extent Group 1 / Time Frame 1

CC ID: 465149
Time Frame Type: Range
Start: 2000
End: 2002

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Access Information

Security Class: Unclassified
Data Access Constraints:

None

Data Use Constraints:

These maps are NOT to be used for navigation. These estimated depth maps of the Northwestern Hawaiian Islands have been reviewed by numerous decision makers and scientists familiar with the Northwestern Hawaiian Islands region.

Distribution Information

Distribution 1

CC ID: 465151
Download URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi/
Distributor:
Description:

Downloadable Data

File Type: geotiff

URLs

URL 1

CC ID: 465142
URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi/
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 465174
Activity Date/Time: 2013-10-21
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 465173
Activity Date/Time: 2017-04-05
Description:

Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 584379
Activity Date/Time: 2017-09-13
Description:

Partial upload of Spatial Info section only.

Activity Log 4

CC ID: 601000
Activity Date/Time: 2017-11-01
Description:

Replaced entire Lineage section to populate new Source Contribution field.

Activity Log 5

CC ID: 716636
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Data Quality

Accuracy:

Once maps were positioned, validation was performed by comparison to independently-acquired, trackline LIDAR data from Kure Atoll, Midway Atoll, and Pearl and Hermes Atoll. Validation also was performed by comparison to NOS nautical charts. The draft estimated depth maps were reviewed by scientists in Hawaii who have first-hand local knowledge of the Northwestern Hawaiian Islands. Comments were received and incorporated into draft maps.The absolute accuracy of estimated depth varies with water depth. The error is generally 0.3 meters for water less than 1 meter deep, + or - 15 percent in water up to 15 meters deep, and + or - 30 percent in water greater than 15 meters deep.

Horizontal Positional Accuracy:

Spatial data meets or exceeds national map accuracy standards for fixed features. Kure Atoll, Midway Atoll, Pearl and Hermes Atoll, Lisianski Island, Laysan Island, French Frigate Shoals, and Nihoa Island are positioned to within five (5) meters at sea level. Necker Island is positioned to within 15 meters at sea level. Maro Reef is positioned to within eight (8) meters at sea level.

Vertical Positional Accuracy:

none reported

Completeness Report:

High-resolution satellite imagery was analyzed to produce estimated depth maps of the North Western Hawaiian Islands. Estimated depth can be determined from imagery for clear water to between 20 m and 35 m, depending on the bottom type and absolute water clarity. Because the water surrounding Gardner Pinnacles is too deep, no estimated depth was generated there. No satellite imagery was available for Gambia Shoal.

Conceptual Consistency:

Multispectral satellite imagery was positioned using National Geodetic Survey ground control data for Kure Atoll, Midway Atoll, Pearl and Hermes Atoll, Lisianski Island, Laysan Island, French Frigate Shoals, and Nihoa Island. Satellite imagery of Necker Island was positioned using satellite ephemeris data. Satellite imagery of Maro Reef was positioned using a combination of satellite ephemeris data and supplemental depth transect data.

Lineage

Sources

IKONOS Panchromatic and Multispectral Imagery for the Northwestern Hawaiian Islands

CC ID: 601001
Contact Name: Space Imaging
Publish Date: 2002-01-01
Extent Type: Range
Extent Start Date/Time: 2000
Extent End Date/Time: 2001
Scale Denominator: 4
Citation URL: http://www.spaceimaging.com/
Source Contribution:

High resolution satellite imagery was analyzed to produce estimated depth maps of the Northwestern Hawaiian Island | Type of Source Media: IKONOS high-resolution satellite imagery

Process Steps

Process Step 1

CC ID: 601002
Description:

Estimated depth was produced using a band-ratio procedure (see Stumpf et al., Limnology and Oceanography, 2003). The procedure uses two multispectral bands and requires very little tuning. Using this method, estimated depth can be determined in clear water to between 20 - 35 meters, depending on the bottom type and water clarity. Estimated depth (estimated water depths in feet) were assigned either a range of numeric values or a single numeric value representative of (but not equal to) depth. These individual numeric values or ranges of numeric values were used to apply a ramped RGB color palette. Because the environment in the NWHI is very complex, two profiles of estimated depth were generated. The "shallow-water" RGB depth profile was applied to Kure Atoll, Midway Atoll, Pearl and Hermes Atoll, and French Frigate Shoals. The "deep-water" RGB depth profile was applied to Lisianski Island, Laysan Island, Maro Reef, Necker Island, and Nihoa Island. Because the water surrounding Gardner Pinnacles is too deep, no estimated depth was generated there.

Process Date/Time: 2001-01-01 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Blue_color_value
Entity Green_color_value
Entity Red_color_value
Entity max_depth
Entity min_depth

Catalog Details

Catalog Item ID: 39306
GUID: gov.noaa.nmfs.inport:39306
Metadata Record Created By: Tyler Christensen
Metadata Record Created: 2017-04-05 12:51+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2018-02-08
Owner Org: NCCOS
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-02-08
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-02-08