38719 421-0824-IKONOS Data Set Published / External 37187 Hawaii_images_2000 Project Completed 2000 This project is a cooperative effort among the National Ocean Service, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment; the University of Hawaii; and Analytical Laboratories of Hawaii, LLC. The goal of the work was to develop coral reef mapping methods and compare benthic habitat maps generated by photointerpreting georeferenced color aerial photography, hyperspectral and IKONOS satellite imagery.The enhanced spectral resolution of hyperspectral and control of bandwidths of multispectral data yield an advantage over color aerial photography particularly when coral health and time series analysis of coral reef community structure are of interest. Multispectral (blue/green/red/near-infrared) IKONOS imagery was obtained at a four meter pixel resolution. The IKONOS imagery was processed to minimize atmospheric and water column effects. Photointerpreters can accurately and reliably delineate boundaries of features in the imagery as they appear on the computer monitor using a software interface such as the Habitat Digitizer. The National Ocean Service is conducting research to digitally map biotic resources and coordinate a long-term monitoring program that can detect and predict change in U.S. coral reefs, and their associated habitats and biological communities. 543 Theme ISO 19115 Topic Category environment Theme ISO 19115 Topic Category imageryBaseMapsEarthCover Theme NOS Data Explorer Topic Category Environmental Monitoring Theme NOS Data Explorer Topic Category Remotely Sensed Imagery/Photos Theme IKONOS Theme IKONOS imagery Theme SAV Theme benthic Theme coral Theme habitat Theme mangrove Theme oceans Theme reef Theme seagrass Spatial Hawaii Spatial Kona Spatial U.S. Exclusive Economic Zone Spatial United States National Centers for Coastal Ocean Science Silver Spring MD Data Set None Planned remote sensing image The National Oceanic and Atmospheric Administration (NOAA), National Centers for Coastal Ocean Science (NCCOS), Biogeography Program produced this data CD-ROM. NCCOS Biogeography Program does not guarantee the accuracy of the geographic features or attributes. Data Steward 2000 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Distributor 2000 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Metadata Contact 2000 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Point of Contact 2000 Position NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov Principal Investigator 2000 Person Battista, Tim tim.battista@noaa.gov Ground Condition -155.8633 -155.8188 20.0557 20.0115 Discrete 2000 Yes Unclassified Project Information is available online, or on CD-ROM through the NCCOS Biogeography Program.; None None https://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/mosaics/421-0824-Ikonos.zip Downloadable Data MrSID SID-MrSID/Multiresolution Seamless Image DB https://ccma.nos.noaa.gov/products/biogeography/hawaii_cd/data/ Online Resource https://ccma.nos.noaa.gov/products/biogeography/hawaii_cd/data/hawaiifl.aspx Online Resource https://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/mosaics/421-0824-Ikonos.zip Online Resource 2013-12-24 Date that the source FGDC record was last modified. 2017-04-05 Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. 2017-09-13 Partial upload of Spatial Info section only. 2017-11-01 Replaced entire Lineage section to populate new Source Contribution field. 2018-02-08 Partial upload of Positional Accuracy fields only. All of the IKONOS imagery was purchased in National Imagery Transmission Format (NTIF) with the associated Rational Polynomial Coefficients (RPCs). When using image analysis software capable of reading NITF files with associated RPCs, the horizontal positioning error never exceeded 15 m (for locations where there is little or no vertical relief to affect image pixel displacement. The IKONOS imagery swaths, were mosaicked to within one pixel width, and were processed to minimize atmospheric effects and compensate for water column effects. The IKONOS imagery were optimized to maximize true color and during the map preparation the color was strategically manipulated to extract the most habitat information. The IKONOS satellite imagery were processed to remove atmospheric effects and compensate for water column effects. All of the IKONOS images were collected with collection angles of less than 20 degrees from nadir. Constraining the collection angle is important because positioning features on the seabed using satellite imagery is affected by refraction of light through the water column. When the collection angle is limited to less than 20 degrees, the maximum offset of seabed features would be less than 4 m in water less than 15 m deep and less than 8 m in water less than 30 meters deep. IKONOS Satellite Imagery Space Imaging Inc. 2000-01-01 Discrete 2000 http://www.geoeye.com Used to identify and digitize benthic habitats for the eight main Hawaiian Islands. | Source Geospatial Form: remote-sensing image | Type of Source Media: IKONOS Imagery 1 The IKONOS imagery was purchased in National Imagery Transmission Format (NITF) with the associated Rational Polynomial Coefficients (RPCs) in 11-km-wide swaths. NOS mosaicked the IKONOS imagery swaths to produce complete images of locales to within one pixel width.The IKONOS satellite imagery was processed to minimize atmospheric and water column effects. First, the raw satellite images were converted from Digital Numbers (DNs) to normalized reflectance. Normalized reflectance converts DNs into standardized, satellite-independent, comparable values. The acquisition angles (ephemeris data) of the satellite relative to the ground at the time of image acquisition were also used. Calibration coefficients for the satellite, provided by Space Imaging, were used to calculate at-satellite radiance, which was then transformed to reflectance.The normalized reflectance imagery was then transformed into water reflectance (or the signal less than 10 cm above the water surface). Water reflectance uses the near-infrared band to remove radiance attributable to atmospheric and surface effects. 2002-01-01T00:00:00 gov.noaa.nmfs.inport:38719 Tyler Christensen 2017-04-05T12:48:25 SysAdmin InPortAdmin 2025-05-15T19:16:10 2018-02-08 National Centers for Coastal Ocean Science NCCOS 1002 Public No No 2018-02-08 1 Year 2019-02-08