Derived bathymetry from IKONOS satellite imagery of nearshore benthic habitats

Description

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.

Resources

Name Format Description Link
57 DD2_Depth2_filtermin4x4_10m.zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/mhi/bathymetry/DD2_Depth2_filtermin4x4_10m.zip
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/25280
0 Pacific Island Fisheries Science Center homepage https://www.pifsc.noaa.gov
21 Online Resource http://www.soest.hawaii.edu/pibhmc/pibhmc_mhi_mai_bathy.htm
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/25280.pdf

Tags

  • crep
  • doc/noaa/nmfs/pifsc
  • pacific remote islands marine national monument
  • north pacific ocean
  • coral reef ecosystem division
  • pifsc
  • equatorial pacific ocean
  • 467
  • pacific remote island areas
  • bathymetry
  • oceans
  • coral reef conservation program
  • mapping and ecospatial information products to support coral reef ecosystem management in the pacifi
  • noaa
  • nmfs
  • us doc
  • pacific islands fisheries science center
  • u.s. department of commerce
  • earth science
  • national marine fisheries service
  • bathymetry/seafloor topography
  • pria
  • cred
  • sea floor
  • surface measurements
  • ecosystem sciences division
  • benthic habitat mapping and characterization in the pacific islands region
  • coastal processes
  • coral reefs
  • geographic information
  • south pacific ocean
  • coral reef ecosystem program

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