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Estimated Depth Maps of the Northwestern Hawaiian Islands Derived from High Resolution IKONOS Satellite Imagery (Draft)

Identification_Information:

Citation:

Citation_Information:

Originator:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Remote Sensing Team

Publication_Date: 20021231

Title:: Estimated Depth Maps of the Northwestern Hawaiian Islands Derived from High Resolution IKONOS Satellite Imagery (Draft)

Edition: 1

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Silver Spring, MD

Publisher:: NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS)

Online_Linkage:: http://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi_mapping.html

Description:

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 between 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.coralreef.gov

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates_Times:

Beginning_Date: 2000

Ending_Date: 2002

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -179.00

East_Bounding_Coordinate: -160.00

North_Bounding_Coordinate: 29.00

South_Bounding_Coordinate: 22.00

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: coral

Theme_Keyword: reef

Theme_Keyword: satellite imagery

Theme_Keyword: estimated depth

Theme_Keyword: oceans

Theme_Keyword: coral reef conservation

Theme_Keyword: coastal ecosystem science

Theme_Keyword: marine navigation

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: United States

Place_Keyword: Northwestern Hawaiian Islands

Place_Keyword: Kure Atoll

Place_Keyword: Midway Atoll

Place_Keyword: Gardner Pinnacles

Place_Keyword: Pearl and Hermes Atoll

Place_Keyword: Lisianski Island

Place_Keyword: Laysan Island

Place_Keyword: Maro Reef

Place_Keyword: French Frigate Shoals

Place_Keyword: Necker Island

Place_Keyword: Nihoa Island

Access_Constraints: none

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 makes and scientists familiar with the Northwestern Hawaiian Islands region. Although they represent the best available characterizations of the shallow-water ecosystems of this regions the maps should be considered DRAFT versions.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Remote Sensing Team

Contact_Position: Remote Sensing Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 1305 East West Highway, N/SCI-1

City: Silver Spring

State_or_Province: Maryland

Postal_Code: 20910

Contact_Voice_Telephone: 301-713-3028

Contact_Facsimile_Telephone: 301-713-4384

Contact_Electronic_Mail_Address: Richard.Stumpf@noaa.gov

Hours_of_Service: Monday to Friday, 0800 - 1700, EST

Data_Set_Credit: NOAA, University of Hawaii, U.S. Fish and Wildlife Service

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: 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.

Logical_Consistency_Report:: 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.

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.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: 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:

Vertical_Positional_Accuracy_Report: none reported

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Space Imaging

Publication_Date: 2002

Title:: IKONOS Panchromatic and Multispectral Imagery for the Northwestern Hawaiian Islands

Edition: 1

Publication_Information:

Publication_Place: Thornton, CO

Publisher: Space Imaging

Other_Citation_Details:

Acquisition_Date: Gardner Pinnacles (2 swaths; 20001014)

Acquisition_Date: Kure Atoll (2 swaths; first acquisition; 20001120)

Acquisition_Date: Kure Atoll (2 swaths; second acquisition; 20010926)

Acquisition_Date: Laysan Island (swaths 1 and 3; 20010124)

Acquisition_Date: Laysan Island (swath 2; 20010215)

Acquisition_Date: French Frigate Shoals (first acquisition; 4 swaths; 20001011)

Acquisition_Date: French Frigate Shoals (second acquisition; swaths 1, 2, and 3; 20010911)

Acquisition_Date: French Frigate Shoals (second acquisition; swath 4; 20010919)

Acquisition_Date: Midway Atoll (swath 1; 20010122)

Acquisition_Date: Midway Atoll (swath 2; 20010318)

Acquisition_Date: Lisianski Island (3 swaths; 20001012)

Acquisition_Date: Nihoa (swath 1; 20010109)

Acquisition_Date: Nihoa (swath 2; 20010120)

Acquisition_Date: Nihoa (swath 3; 20010418)

Acquisition_Date: Pearl and Hermes Atoll (3 swaths; 20010119)

Acquisition_Date: Maro Reef (3 swaths; 20010724)

Acquisition_Date: Necker Island (2 swaths; 20010126)

Online_Linkage:: http://www.spaceimaging.com/

Source_Scale_Denominator: 4-meter multispectral satellite imagery

Type_of_Source_Media: IKONOS high-resolution satellite imagery

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates_Times:

Beginning_Date: 2000

Ending_Date: 2001

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: NOAA/NOS/benthic characterization data

Source_Contribution:: High resolution satellite imagery was analyzed to produce estimated depth maps of the Northwestern Hawaiian Island

Process_Step:

Process_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: 2001

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Remote Sensing Team

Contact_Position: Remote Sensing Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 1305 East West Highway, N/SCI-1

City: Silver Spring

State_or_Province: Maryland

Postal_Code: 20910

Contact_Voice_Telephone: 301-713-3028

Contact_Facsimile_Telephone: 301-713-4384

Contact_Electronic_Mail_Address: Richard.Stumpf@noaa.gov

Hours_of_Service: Monday to Friday, 0800 - 1700, EST

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: Northwestern Hawaiian Islands

Direct_Spatial_Reference_Method: raster

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 1

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -177

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: 4

Ordinate_Resolution: 4

Planar_Distance_Units: meters

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 2

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -171

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: 4

Ordinate_Resolution: 4

Planar_Distance_Units: meters

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 3

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -165

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: 4

Ordinate_Resolution: 4

Planar_Distance_Units: meters

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 4

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -159

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: 4

Ordinate_Resolution: 4

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80, WGS84

Semi_major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.25

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: min_depth

Entity_Type_Definition: The minimum depth (in feet) in this depth range.

Entity_Type_Definition_Source: NOS - Remote Sensing Team

Detailed_Description:

Entity_Type:

Entity_Type_Label: max_depth

Entity_Type_Definition: The maximum depth (in feet) in this depth range.

Entity_Type_Definition_Source: NOS - Remote Sensing Team

Detailed_Description:

Entity_Type:

Entity_Type_Label: Red_color_value

Entity_Type_Definition:: A numeric value ranging from 0-255 assigned to
the red channel of the RGB color palette.

Entity_Type_Definition_Source: NOS - Remote Sensing Team

Detailed_Description:

Entity_Type:

Entity_Type_Label: Green_color_value

Entity_Type_Definition:: A numeric value ranging from 0-255 assigned to
the green channel of the RGB color palette.

Entity_Type_Definition_Source: NOS - Remote Sensing Team

Detailed_Description:

Entity_Type:

Entity_Type_Label: Blue_color_value

Entity_Type_Definition:: A numeric value ranging from 0-255 assigned to
the blue channel of the RGB color palette

Entity_Type_Definition_Source: NOS - Remote Sensing Team

Overview_Description:

Entity_and_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.

Entity_and_Attribute_Detail_Citation:

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

_,0,255,255,255

1,2,243,251,255

3,4,227,244,255

5,6,211,238,255

7,8,195,231,255

9,10,179,225,255

11,12,162,219,255

13,14,146,212,255

15,16,130,206,255

17,18,118,201,255

_,19,102,195,255

20,21,85,188,255

22,23,69,182,255

24,25,53,175,255

26,27,37,169,255

28,29,21,162,255

30,31,5,156,255

32,33,0,151,255

34,35,0,145,252

36,37,0,138,246

_,38,0,132,241

39,40,0,126,236

41,42,0,119,230

43,44,0,113,225

45,46,0,106,219

47,48,0,102,215

49,50,0,95,210

51,52,0,89,204

53,54,0,82,199

_,55,0,76,193

56,57,0,69,188

58,59,0,63,183

60,61,0,57,177

62,63,0,50,172

64,65,0,45,168

66,67,0,39,162

68,69,0,33,157

70,71,0,26,151

72,73,0,20,146

_,74,0,13,141

75,76,0,7,135

77,78,0,0,130

79,80,0,0,126

81,82,0,0,120

83,84,0,0,115

85,92,0,0,109

93,99,0,0,100

100,109,0,0,100

110,111,0,0,95

112,116,0,0,95

117,127,0,0,90

128,138,0,0,90

139,143,0,0,90

144,200,0,0,90

201,240,0,0,0

241,241,40,0,100

242,249,0,0,0

_,250,167,133,119

251,255,0,0,0

Entity_and_Attribute_Detail_Citation:

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_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Remote Sensing Team

Contact_Position: Remote Sensing Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 1305 East West Highway, N/SCI-1

City: Silver Spring

State_or_Province: Maryland

Postal_Code: 20910

Contact_Voice_Telephone: 301-713-3028

Contact_Facsimile_Telephone: 301-713-4384

Contact_Electronic_Mail_Address: Richard.Stumpf@noaa.gov

Hours_of_Service: Monday to Friday, 0800 - 1700, EST

Resource_Description: Downloadable Data

Distribution_Liability: Not to be used for navigation.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: geotiff

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:: http://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi/welcome.html

Digital_Form:

Digital_Transfer_Information:

Format_Name: geotiff

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO-9660

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20060810

Metadata_Review_Date: 20031215

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Remote Sensing Team

Contact_Position: Remote Sensing Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 1305 East West Highway, N/SCI-1

City: Silver Spring

State_or_Province: Maryland

Postal_Code: 20910

Contact_Voice_Telephone: 301-713-3028

Contact_Facsimile_Telephone: 301-713-4384

Contact_Electronic_Mail_Address: Richard.Stumpf@noaa.gov

Hours_of_Service: Monday to Friday, 0800 - 1700, EST

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998