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    • Derived bathymetry from IKONOS satellite imagery of nearshore benthic habitats

    Metadata Updated: October 19, 2024

    Methods used were adapted from a "cookbook" of instructions developed by Kyle Hogref for using IKONOS imagery data to derive seafloor elevations in optically clear water. This dataset was derived from high-resolution (2 m) imagery from DigitalGlobe's WorldView-2 sensor of the Kaanapali area of Maui, Hawaii. Sensor bands 1,2 and 5 (coastal, blue and near IR respectively) were used to derive depth information. The method assumes uniform water clarity but deviations from that condition made extraction difficult in water greater than 30 m depth in the Kaanapali scene used. Results show that biotic material or sediment in the water column skewed results shallower if the material has a high albedo and deeper if the material has a low albedo. Nearshore areas were significantly less impacted in the Kaanapali area, due to the geomorphology of the area and the hi resolution and quality of the imagery, allowing visual descrimination of apparent sediment in the water column. For presentation purposes the map product shows an Inverse Distance Weighted interpolated bathymetry surface, restricted to data within 600 m of the shoreline.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date February 29, 2024
    Metadata Created Date October 19, 2024
    Metadata Updated Date October 19, 2024
    Reference Date(s) 2016 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NMFS PIFSC

    Other Data Resources

    Graphic Preview

    Layout of data on original satellite imagery

    Additional Metadata

    Resource Type Dataset
    Metadata Date February 29, 2024
    Metadata Created Date October 19, 2024
    Metadata Updated Date October 19, 2024
    Reference Date(s) 2016 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:25280
    Access Constraints Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: Derived bathymetry from IKONOS satellite imagery of nearshore benthic habitats [Data Date Range], https://www.fisheries.noaa.gov/inport/item/25280., Access Constraints: none, Use Constraints: These data are not to be used for navigation purposes. Please acknowledge the NOAA Pacific Islands Fisheries Science Center, and the Joint Institute for Marine and Atmospheric Research (JIMAR) and Hawaii Mapping Research Group (HMRG) at the University of Hawaii as the sources of this information., Distribution Liability: These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
    Bbox East Long -156.647
    Bbox North Lat 20.9839
    Bbox South Lat 20.8357
    Bbox West Long -156.776
    Coupled Resource
    Frequency Of Update notPlanned
    Graphic Preview Description Layout of data on original satellite imagery
    Graphic Preview File http://www.soest.hawaii.edu/pibhmc/MHI_images/KaanapaliDerivedBathy_445.jpg
    Graphic Preview Type JPEG
    Harvest Object Id 54388ec4-30f6-473a-becf-92104e5fd1d6
    Harvest Source Id c0beac72-5f43-4455-8c33-1b345fbc2dfe
    Harvest Source Title NMFS PIFSC
    Licence 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.
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-156.776, 20.8357], [-156.647, 20.8357], [-156.647, 20.9839], [-156.776, 20.9839], [-156.776, 20.8357]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2010-04-06
    Temporal Extent End 2010-04-06

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