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Gridded bathymetry and IKONOS estimated depths of the shelf and slope environments of the Northwestern Hawaiian Islands, USA within UTM Zone 3. Bottom coverage was achieved in depths between 0 and 5200 meters. The ASCII includes multibeam bathymetry from the Simrad EM300, Simrad EM3002d, and Reson 8101 multibeam sonars collected as of October 2006 by the NOAA Coral Reef Ecosystem Division in depths between 20 and 5000 meters. The ASCII grid also includes multibeam bathymetry from the SeaBeam 3012 phase 1 hybrid multibeam sonar system installed on the R/V Kaimikai-o-Kanaloa provided by the Hawaii Undersea Research Laboaratory for this data synthesis. The ASCII grid also includes estimated depths derived from high resolution IKONOS satellite imagery by the NOAA/NOS/NCCOS/CCMA Remote Sensing Team in shallow water between 0 and 16 meters.