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

Data Sources – Lots!USGS 20-meter Main Hawaiian Islands bathy datahttp://wrgis.wr.usgs.gov/dds/dds-55/pacmaps/hw_index.htm

USGS - US Pacific Territories DRGshttp://hbmp.hawaii.edu/website/pacific/

SOPAC Map Servershttp://www.sopac.org/tiki/tiki-index.php?page=Maps

Currents, SST, SSH, Opendap, etchttp://apdrc.soest.hawaii.edu/w_data/ocean3.htm

Shorelines and Habitat for US Pacific Territorieshttp://ccma.nos.noaa.gov/products/biogeography/us_pac_terr/htm/data.htm

NWHI IKONOS, bathy, habitathttp://ccma.nos.noaa.gov/ecosystems/coralreef/nwhi/welcome.html

CORIS - bathy and IKONOShttp://coris.noaa.gov/

Hawaii Bathy Grids (seamless) - ngdchttp://www.ngdc.noaa.gov/mgg/coastal/grddas10/grddas10.htm

Global Bathy Grids (etopo2 - smith and sandwell) - ngdchttp://www.ngdc.noaa.gov/mgg/fliers/01mgg04.html

NOAA DEMs http://www.ngdc.noaa.gov/mgg/inundation/

NOAA Real Time Satellite Data IMShttp://nowcoast.noaa.gov/

UH Coastal Geology Data- LIDAR, aerial photos, LANDSAT, DEMshttp://www.soest.hawaii.edu/coasts/

Everything Nautical Charts - ENCs and RNCshttp://www.csc.noaa.gov/products/enc/http://chartmaker.ncd.noaa.gov/mcd/enc/download.htmhttp://nauticalcharts.noaa.gov/mcd/Raster/Index.htm

NMFS GIS Committee Datahttp://www.nmfs.noaa.gov/gis/data/index.htm

BioGeo - habitat and imagery datahttp://ccma.nos.noaa.gov/about/biogeography/

NOS - bathy and remotely sensed datahttp://www.coralreef.noaa.gov/http://nosdataexplorer.noaa.gov/nosdataexplorer/

Data Sources – Even More!

How to make sense of it all? • Links will be up on HIGICC

web site

• Highlight three useful sites today

– Electronic Navigational Charts– NGDC GEODAS – HMRG Main Hawaiian Island

Multibeam Synthesis

• Keep partnership opportunities in mind when scoping new projects

• Produced by the Office of Coast Survey

• IHO S-57 international exchange format (non-proprietary, publicly available)

• Not the same as a raster chart

Electronic Navigational Charts (ENC®s)

Two step process:

Accessing and Using ENC®s

Select and download ENC

data

Download ENC Data Handler extension for

ArcGIS

• Download ENCsfrom the Office of Coast Survey web site: http://nauticalcharts.noaa.gov/mcd/enc/download.htm

• Select graphically or by text

• Place, then collect order by downloading

Accessing and Using ENC®s

Accessing and Using ENC®s• ENC Data Handler

extension from Coastal Services Center

http://www.csc.noaa.gov/products/enc/

• Easy to download

• Comes with easy to follow instruction PDF

• Follow ENC Data Handler instructions to import downloaded data into geodatabase

• Use ENC Data Handler extension in Arc to apply special nautical chart symbology to each of the subtypes

• Please note that these data are Not For Navigational Purposes!

Accessing and Using ENC®s

National Geophysical Data Center (NGDC)

Global Bathy Data - ETOPO2v2Data Sources:• Smith & Sandwell• GLOBE (Global Land

One-kilometer Base Elevation)

• IBCAO (International Bathymetric Chart of the Arctic Ocean)

• NGDC Coastal Relief Model

• NGDC Great Lakes Bathymetric Data

• Caspian Sea Bathymetry

GEODAS (GEOphysical DAtaSystem)

http://www.ngdc.noaa.gov/mgg/bathymetry/relief.html

Create Custom Grid

GEODAS - Create Custom Grid

Main Hawaiian Islands MultibeamSynthesis

•The Hawai‘i Undersea Research Laboratory (HURL)

•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:

mbdatalist –Rcoordinates –Imasterlist >! parsed_list

A few examples from the parsed_list:

KM-em1002/km0302/jd070/gsf/KMMmbb030700356.d01 121 200.00000Lidar/shoals/Oahu/Oahu01.pos.xyz 162 250.00000JAMSTEC-nuuanu99/sb1999908131531.mb41 41 9.00000USGS98/oahu_98/gsf/OA03-980330759.d01 121 250.00000

FILE PATH AND NAME FILE FORMAT WEIGHT

The list for the small area off of windward Oahu contains:• 460 files • 10 different file format types

Format 121 = SAIC’s Generic Sensor FormatFormat 162 = Longitude, Latitude, Positive Depth FormatFormat 41 = SeaBeam 2100 series Format

Gaussian Weighted Mean Gridding Alogrithm in MB-System

mbgrid –F1 –Rcoordinates –A2 –G3 –C2 –E50/50/meters –Iparse_list –Ooutput_file

Put computer processors to work:

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...

Issues – Filling in the Gaps

Issues – Filling in the Gaps