gov.noaa.nmfs.inport:39306 eng UTF8 dataset National Centers for Coastal Ocean Science resourceProvider NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov pointOfContact 2025-05-15T19:16:07 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Estimated Depth Maps of the Northwestern Hawaiian Islands Derived from High Resolution IKONOS Satellite Imagery est_depth_nwhi 2002-12-31 publication NOAA/NMFS/EDM 39306 https://www.fisheries.noaa.gov/inport/item/39306 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Stumpf, Richard richard.stumpf@noaa.gov principalInvestigator https://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi/ WWW:LINK-1.0-http--link Citation URL Online Resource download 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. This project was conducted in support of the U.S. Coral Reef Task Force http://www.coris.noaa.gov NOAA, University of Hawaii, U.S. Fish and Wildlife Service completed NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov pointOfContact NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov custodian notPlanned bathymetry/topography coral environmental monitoring estimated depth oceans reef satellite imagery theme French Frigate Shoals Gardner Pinnacles Kure Atoll Laysan Island Lisianski Island Maro Reef Midway Atoll Necker Island Nihoa Island Northwestern Hawaiian Islands Pearl and Hermes Atoll United States place DOC/NOAA/NOS/NCCOS > National Centers for Coastal Ocean Science, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian NWHI_Benthic project InPort otherRestrictions Cite As: National Centers for Coastal Ocean Science, [Date of Access]: Estimated Depth Maps of the Northwestern Hawaiian Islands Derived from High Resolution IKONOS Satellite Imagery [Data Date Range], https://www.fisheries.noaa.gov/inport/item/39306. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions 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. otherRestrictions Distribution Liability: Not to be used for navigation. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 39306 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/nccos/dmp/pdf/39306.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference grid eng; US environment oceans -179 -160 22 29 | Currentness: Ground Condition 2000 2002 false eng false min_depth 2017-04-17 publication max_depth 2017-04-17 publication Red_color_value 2017-04-17 publication Green_color_value 2017-04-17 publication Blue_color_value 2017-04-17 publication GeoTIFF NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov distributor https://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi/ WWW:LINK-1.0-http--link https://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi/ Downloadable Data download dataset 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. 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. 2001-01-01T00:00:00 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 4 IKONOS Panchromatic and Multispectral Imagery for the Northwestern Hawaiian Islands 2002-01-01 publication Space Imaging http://www.spaceimaging.com/ WWW:LINK-1.0-http--link Source Citation URL Source Citation URL information 2000 2001