Bathymetric and Related Benthic Data Susan Vogt, GIS Specialist, NOAA Pacific Islands Science Center, Coral Reef Ecosystem Division Joyce Miller, Oceanographer, NOAA Pacific Islands Science Center, Coral Reef Ecosystem Division Robert O’Conner, Fisheries Information Specialist, NOAA Pacific Islands Region Office
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Bathymetric and Related Benthic Data
Susan Vogt, GIS Specialist, NOAA Pacific Islands Science Center, Coral Reef Ecosystem Division
•The Pacific Islands Benthic Habitat Mapping Center (PIBHMC)
Data Exploration - Microsoft's Virtual Earth
MHI Multibeam Bathymetric Synthesis• available for download at www.soest.hawaii.edu/HMRG• GMT netCDF and ArcGIS ASCII format
Great, but how was it created???
www.ldeo.columbia.edu/res/pi/MB-System• open source software package for the processing and display of bathymetry data• widely used in the seafloor mapping community
1. Two years of SOEST money allocated to create a data synthesis starting in 2004
2. Compile all existing multibeam bathymetry for the MHI• Contact all PI’s who have collected multibeam data • Permission to release these data in an online synthesis
3. Master list of all data in MB-System format
4. Quality control - which files are “good” enough to include?• Time intensive and still not complete• Troublesome data edited in XYZ space using SAIC’s SABER
5. Data broken down into 1x1 degree boxes to grid them at 50 m resolution
6. Ongoing data addition and quality control
Let’s do it for this small area off of the windward coast of Oahu!
22 N
21.5 N
158 W 157.5 W
Coordinates
Use MB-System to parse master list file based on coordinates:
62200 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051590626.d01.fbt55800 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051590641.d01.fbt30982 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051590656.d01.fbt65829 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051591400.d01.fbt11479 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051591415.d01.fbt69254 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051591418.d01.fbt68793 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051591433.d01.fbt67351 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051591448.d01.fbt65939 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051591503.d01.fbt24686 data points processed in KM-em1002/km0512/jd159/gsf/KMmba051591518.d01.fbt
…………Outputs a GMT netCDF grid file and a postscript image……….
interpolation grid sizenegativebathymetry
…………convert netCDF grid to ASCII and import to ArcGIS……….
…download DEM’s and imagery from www.soest.hawaii.edu/coasts...