Derived bathymetry from IKONOS satellite imagery of nearshore benthic habitats

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.

Data and Resources

Additional Info

Field Value
Last Updated June 21, 2019, 23:57
Created June 21, 2019, 23:57
access_constraints ["Access Constraints: none | Use Constraints: These data are not to be used for navigation purposes. Please acknowledge the NOAA Pacific Islands Fisheries Science Center,\nand the Joint Institute for Marine and Atmospheric Research (JIMAR) and Hawaii\nMapping Research Group (HMRG) at the University of Hawaii as the sources of\nthis information. | Distribution Liability: These data are not to be used for navigational purposes.\nNOAA makes no warranty regarding these data, expressed or\nimplied, nor does the fact of distribution constitute such a\nwarranty. NOAA cannot assume liability for any damages caused by\nany errors or omissions in these data, nor as a result of the\nfailure of these data to function on a particular system."]
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bbox-north-lat 20.9839
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contact-email john.rooney@noaa.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2016"}]
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
guid gov.noaa.nmfs.inport:25280
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."]
metadata-date 2019-06-04T13:14:25
metadata-language eng
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