Derived bathymetry of nearshore benthic habitats near Kaanapali, Maui, Hawaii
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator:
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Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
- Publication_Date: 20111012
- Title:
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Derived bathymetry of nearshore benthic habitats near Kaanapali, Maui, Hawaii
- Online_Linkage:
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http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/main-hawaiian-islands/maui/bathymetry/
- Description:
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- Abstract:
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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.
- Purpose:
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DG WorldView-2 data are used as the base imagery to derived pseudobathymetry of the
Kaanapali area of Maui. This area has both SHOALS and multi-beam acoustic derived
bathymetry coverage and will provide an example case of the strengths and
weaknesses of pseudobathymetry extraction from high resolution satellite imagery methods.
- Supplemental_Information:
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LiDAR bathymetry of Kaanapali, Maui from Scanning Hydrographic Airborne Operational
LiDAR data from the United States Army Corps of Engineers Joint Airborne LiDAR
Bathymertry Technical Center for Expertise. Multibeam sonar data from the
Main Hawaiian Islands Bathymetry synthesis maintained by the Hawaii Mapping Research Group
at the University of Hawaii, School of Ocean and Earth Science and Technology.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 20100406
- Ending_Date: 20100406
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -156.7760
- East_Bounding_Coordinate: -156.6470
- North_Bounding_Coordinate: 20.9839
- South_Bounding_Coordinate: 20.8357
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: NCEI Geoportal Filter
- Theme_Keyword: CoRIS_Metadata
- Theme:
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- Theme_Keyword_Thesaurus: CRCP Project
- Theme_Keyword:
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M218 Benthic Habitat Mapping and Characterization in the Pacific Islands Region
- Theme_Keyword: 1217
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
- Theme_Keyword:
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EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
- Theme:
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- Theme_Keyword_Thesaurus: None
- Theme_Keyword: Bathymetry
- Theme_Keyword: Multibeam sonar
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: elevation
- Theme_Keyword: 006
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
- Theme_Keyword: Geographic Information > Bathymetry
- Place:
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- Place_Keyword_Thesaurus: None
- Place_Keyword: Maui
- Place_Keyword: Main Hawaiian Islands
- Place_Keyword: United States of America
- Place:
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- Place_Keyword_Thesaurus: CoRIS Place Thesaurus
- Place_Keyword:
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OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Maui Island > Maui Island (20N156W0004)
- Place_Keyword:
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COUNTRY/TERRITORY > United States of America > Hawaii > Maui > Maui Island (20N156W0004)
- Place:
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- Place_Keyword_Thesaurus: CoRIS Region
- Place_Keyword: MHI
- Access_Constraints: none
- Use_Constraints:
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These data are not to be used for navigation purposes. Please acknowledge the NOAA Pacific Islands Fisheries Science Center,
and the Joint Institute for Marine and Atmospheric Research (JIMAR) and Hawaii
Mapping Research Group (HMRG) at the University of Hawaii as the sources of
this information.
- Point_of_Contact:
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- Contact_Information:
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- Contact_Organization_Primary:
-
- Contact_Organization:
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Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Contact_Voice_Telephone: 808 725-5360
- Contact_Facsimile_Telephone: 808 725-5429
- Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
- Contact_Instructions: e-mail preferred
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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http://www.soest.hawaii.edu/pibhmc/MHI_images/KaanapaliDerivedBathy_445.jpg
- Browse_Graphic_File_Description: Layout of data on original satellite imagery
- Browse_Graphic_File_Type: JPEG
- Data_Set_Credit: PIBHMC, CRED, PIFSC, NOAA, JIMAR and HMRG
- Security_Information:
-
- Security_Classification_System: Not applicable
- Security_Classification: Unclassified
- Security_Handling_Description: Not applicable
- Native_Data_Set_Environment:
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netCDF file created using the Generic
Mapping Tools (GMT) and ArcGIS ASCII file, both created in a
LINUX environment
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
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Data are collected for resource
management and research purposes and are examined for internal
consistency; however, no effort is made to compare these data to
external references or to other published data.
- Logical_Consistency_Report:
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These data are believed to be logically
consistent though no tests were performed
- Completeness_Report: Complete
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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Horizontal positioning system: GPS (SPS)
Horizontal position accuracy: 25 m
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report:
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1 m
Raw sounding resolution: Variable
- Lineage:
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- Process_Step:
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- Process_Description:
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Multiple tools in ENVI 4.8 were used to complete the following processing
steps: Data conversion from digital number to radiance, correction for
atmosphere and water surface reflection, linearization of spectral decay
as function of depth, masking of non-applicable values, and bathymetric
derivation using variables from multiple linear regression analysis. Multiple
tools in ArcGIS 10.0 were used for dataset integration and to extract values
for the multiple linear regression analysis and subsequent error analyses.
The statisitcs program Matlab was used for the multiple linear regression
analysis to provide original variables for depth derivation. The multivariate
slope intercept formula used to derive depth was D = a + (bi)(xi) + (bj)(xj)
Where: D = depth a = intercept b = slope x = the linearized spectral value
resulted in 7.8491 - 2.8696(b1) + 7.9593(b2) b1 is the output masked linearized
pictral value of each pixel of Coastal band b2 is the output masked linearized
pictral value of each pixel of Blue band More information on this integration
process is provided in the product error analysis, availble from PIBHMC upon
request. This mosaiced derived bathymetry product (JohDBall3) was then integrated
with the multibeam sonar data, with sonar data prioritized over derived data,
to create the final product (JohDB3MB). A detailed description of all processing
steps is available at: ftp://ftp.soest.hawaii.edu/pibhmc/website/webdocs/documentation/Cookbook_042108.pdf
An error analysis of each derived bathymetry grid used is available from PIBHMC upon request.
To produce the interpolated surface shown in the map, the floating point grid was
converted to a point shapefile in Arc GIS 9.3 using the 'float to raster' and 'raster
to point' tools in the Arc Toolbox. A buffer of 600m from the shoreline was created
and the derived bathymetry points were clipped to exclude data outside this buffer.
This distance was chosen to exclude areas of deeper water that were erroneously
returning shallow depth values, due to characteristics of the water column. An
Inverse Distance Weighted interpolation was run using 3D Analyst, to produce an
interpolated surface, with a grid cell size of 10 m, a variable search radius
with a maximum distance of 60 m, and using the coastline as a barrier. All other
settings used were default. The interpolated surface was clipped using the coastline
and a small number of isolated cells were manually deleted.
- Process_Date: 20111012
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Grid Cell
- Row_Count: 5445
- Column_Count: 5920
- Vertical_Count: 1
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: Universal Transverse Mercator
- Universal_Transverse_Mercator:
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- UTM_Zone_Number: 4
- Transverse_Mercator:
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- Scale_Factor_at_Central_Meridian: 0.9996
- Longitude_of_Central_Meridian: -159
- Latitude_of_Projection_Origin: 0.0
- False_Easting: 500000
- False_Northing: 0.0
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: Row and Column
- Coordinate_Representation:
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- Abscissa_Resolution: 5
- Ordinate_Resolution: 5
- Planar_Distance_Units: meters
- Geodetic_Model:
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- Horizontal_Datum_Name: D_WGS_1984
- Ellipsoid_Name: WGS_1984
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257224
- Vertical_Coordinate_System_Definition:
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- Depth_System_Definition:
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- Depth_Datum_Name: mean lower low water
- Depth_Resolution: 0.01
- Depth_Distance_Units: meters
- Depth_Encoding_Method: Attribute Values
- Entity_and_Attribute_Information:
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- Overview_Description:
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- Entity_and_Attribute_Overview:
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Depth values are real values based on the average of the
soundings that fell within the extracted grid cells. The number
of soundings per grid cell range from >1000 soundings in shallow
depths to as few as 20 soundings in deeper areas. A total error
budget for these data have not been developed. Therefore, the
accuracy of depth measurements should be considered to be within
1 meter.
- Entity_and_Attribute_Detail_Citation: none
- Distribution_Information:
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- Distributor:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization:
-
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Contact_Voice_Telephone: 808 725-5360
- Contact_Facsimile_Telephone: 808 725-5429
- Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
- Contact_Instructions: e-mail preferred
- Resource_Description: Downloadable Data
- Distribution_Liability:
-
These data are not to be used for navigational purposes.
NOAA makes no warranty regarding these data, expressed or
implied, nor does the fact of distribution constitute such a
warranty. NOAA cannot assume liability for any damages caused by
any errors or omissions in these data, nor as a result of the
failure of these data to function on a particular system.
- Standard_Order_Process:
-
- Digital_Form:
-
- Digital_Transfer_Information:
-
- Format_Name: netCDF or Arc ASCII
- Format_Information_Content:
-
These data can be downloaded as either a 2-D binary netCDF raster
grid or an ArcGIS ASCII text file. The netCDF grid
is the default grid file format used by GMT (Generic Mapping
Tools), which created this file. More information can be located
at http://www.soest.hawaii.edu/gmt/and
http://www.unidata.ucar.edu/software/netcdf/. The Arc ASCII file,
for use in ESRI's (http://www.esri.com) GIS software, can be
converted to an Arc Raster Grid using ArcToolbox ASCII to Raster
conversion tool.
- Digital_Transfer_Option:
-
- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name:
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ftp://ftp.soest.hawaii.edu/pibhmc/website/data/mhi/bathymetry/DD2_Depth2_filtermin4x4_10m.zip
- Fees: None
- Metadata_Reference_Information:
-
- Metadata_Date: 20190605
- Metadata_Review_Date: 20111025
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization:
-
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Contact_Voice_Telephone: 808 725-5360
- Contact_Facsimile_Telephone: 808 725-5429
- Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
- Contact_Instructions: e-mail preferred
- Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: Universal Time
- Metadata_Access_Constraints: None
- Metadata_Use_Constraints: None
- CoRIS:
-
- CoRIS_ID: 20111019020735
- CoRIS_Children: None
- CoRIS_Beginning_Date: 20100406
- CoRIS_Ending_Date: 20100406
- CoRIS_Metadata_Link:
-
https://www.coris.noaa.gov/metadata/records/html/dd2_depth2_filtermin4x4_10m.html
- CoRIS_Tracking_ID: 6379
Generated by mp version 2.9.48 on Thu Apr 25 10:42:42 2024