Mosaic of gridded multibeam bathymetry and bathymetry derived from multispectral IKONOS satellite imagery of Tau Island, Territory of American Samoa, USA
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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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Hogrefe Natural Systems Analysis in collaboration with
Davey Jones Locker GIS Laboratory, Oregon State Universtiy for
Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries
Science Center, Pacific Islands Benthic Habitat Mapping Center
- Publication_Date: 20081028
- Title:
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Mosaic of gridded multibeam bathymetry and bathymetry derived
from multispectral IKONOS satellite imagery of Tau Island, Territory
of American Samoa, USA
- Geospatial_Data_Presentation_Form: raster digital data
- Online_Linkage: http://www.soest.hawaii.edu/pibhmc/
- Online_Linkage: http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tau_bathy.htm
- Description:
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- Abstract:
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Gridded multibeam bathymetry is integrated with bathymetry
derived from multispectral IKONOS satellite data. Gridded (10 m cell
size) multibeam bathymetry collected aboard NOAA Ship Hiialaka'i and
R/V AHI. Bathymetry values shallower than 15 m were derived by
gauging the reletive attenuation of blue and green spectral radiance
as a function of depth. A multiple linear regression analysis of
linearized blue and green spectral values against depth determined
the variables of y-intercept, blue slope and green slope values.
Variables then used in multivariate slope intercept formula to derive
depth. Variables were adjusted to improve the statistical accuracy of
the final derived bathymetry product. Digital image processing to derive
depths conducted with the ENVI 4.3 software program while data editing
and integration was performed using ArcGIS 9.3. This data set is for
the shelf environment of Tau Island, American Samoa.
- Purpose:
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The data were derived in support of NOAA Coral Reef Conservation
Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems.
This data set specifically addresses Objective 1 and 4: to develop
high-resolution benthic maps and to characterize priority deep
water reefs and associated habitats. This integration of derived
bathymetry with multibeam sonar data provides a GIS layer with
expanded spatial coverage that may be used for benthic and essential
fish habitat characterization, and for the study of geologic features.
By combining the dataset with other bathymetry, backscatter, derivatives,
and in situ data, they collectively compose benthic habitat maps
designed to be used to understand and predict shallow depth (0m to 150m)
benthic habitats for organisms that inhabit coral reef ecosystems.
- Supplemental_Information:
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Gridded multibeam data were collected aboard the Hi'ialakai, a 218'
United States National Oceanographic and Atmospheric Administration
(NOAA) research ship, and aboard the R/V AHI (Acoustic Habitat
Investigator), a 25' survey launch owned and operated by the NOAA
Pacific Islands Fisheries Science Center in Honolulu, HI. The
metadata for the bathymetry is documented in the product metadata,
tau_10m.txt. (http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tau_bathy.htm)
Original IKONOS imagery was purchased to support the Pacific Islands
Geographic Information System (GIS) project and National Ocean Service's
(NOS) coral mapping activities. Orthographically corrected IKONOS Imagery
was provided by NOAA's National Centers for Coastal Ocean Science, Center
for Coastal Monitoring and Assessment. The metadata for this IKONOS
imagery is documented in the product metadata, tau_msi_metadata_2003.txt.
(http://www.soest.hawaii.edu/pibhmc/)
- 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: 20021107
- Ending_Date: 20040212
- 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: -169.597758
- East_Bounding_Coordinate: -169.410175
- North_Bounding_Coordinate: -14.186811
- South_Bounding_Coordinate: -14.286236
- 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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Benthic Habitat Mapping and Characterization - American Samoa and the U.S. Pacific Remote Island Area
- Theme_Keyword: 1084
- 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_Keyword:
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EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
- Theme_Keyword:
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EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > IKONOS
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
- Theme_Keyword: Geographic Information > Bathymetry
- 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: None
- Theme_Keyword: Slope
- Theme_Keyword: Bathymetry
- Theme_Keyword: Multibeam sonar
- Place:
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- Place_Keyword_Thesaurus: None
- Place_Keyword: Tau Island
- Place_Keyword: American Samoa
- Place_Keyword: United States of America
- Place:
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- Place_Keyword_Thesaurus: CoRIS Place Thesaurus
- Place_Keyword:
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COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Ta'u Island (14S169W0012)
- Place_Keyword:
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OCEAN BASIN > Pacific Ocean > Manu'a Group > Ta'u Island (14S169W0012)
- Place:
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- Place_Keyword_Thesaurus: CoRIS Region
- Place_Keyword: AmSam
- Access_Constraints: None
- Use_Constraints:
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These data are not to be used for navigation purposes. Please acknowledge NOAA Pacific Islands Fisheries
Science Center, the Joint Institute for Marine and
Atmospheric Research (JIMAR) University of Hawaii and Davey
Jones Locker GIS Laboratory Oregon State University as the
sources of this information.
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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http://www.soest.hawaii.edu/pibhmc/amsamoa_images/Tau_bathymetry_5m_mb&IKONOS_445.jpg
- Browse_Graphic_File_Description: Gridded Bathymetry
- Browse_Graphic_File_Type: jpeg
- Data_Set_Credit:
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NOAA PIFSC CRED, the Pacific Islands Benthic Habitat
Mapping Center and Davey Jones Locker GIS Laboratory
Oregon State University
- Security_Information:
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- Security_Classification_System: Not applicable
- Security_Classification: Unclassified
- Security_Handling_Description: Not applicable
- Native_Data_Set_Environment:
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ArcGIS ASCII file or ArcGIS Grid file,
bathymetry derived from 4x4m multispectral satellite imagery (IKONOS)
using ENVI 4.3, multibeam and derived bathymetry were integrated using
ArcGIS 9.3
- 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 tested 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 C/A
Horizontal position accuracy: 25 meters
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report:
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Range resolution of sonar: varies with depth
Raw sounding resolution: varies with depth
Vertical accuracy of gridded sonar product: ~ 1% of water depth
Vertical accuracy of derived bathymetry product: 5 meter range
- Lineage:
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- Process_Step:
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- Process_Description:
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Multiple tools in ENVI 4.3 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 9.3 were used for dataset integration and to extract values
for the multiple linear regression analysis and subsequent error
analyses. The statisitcs program S-Plus 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 Depth=Yint+(Mblue)(Xblue)+(Mgreen)(Xgreen). Three
derived products, two from the same image (Tau02) and one from an
additional image (Tau00) were integrated to expand coverage. The
original variables for Tau02 were Yint=8.5332, Mblue=-7.9868, and
Mgreen= 23.6889. For the first product used in the mosaic (BD12),
the slope values were reduced to Mblue=-6.9868 and Mgreen=22.6889
to increase depth estimates in shallow areas. In an attempt to
improve accuracy, the spectral data were re-linearized and new
multiple linear regression produced the variables Yint=1.8707,
Mblue=-4.2392 and Mgreen=12.9777. These variables resulted in
the second product (DB14) used in the mosaic. The third product
(DB12) was derived from Tau00 to fill a gap in the NW corner of the
island not covered by Tau02. The original MLR variables were Yint=
19.6442, Mblue=-7.8246 and Mgreen=27.4854. The slope values were
changed to Mblue=-2.8246 and Mgreen=22.4854 to increase depth
estimates in shallow areas. While compiling the derived bathymetry
mosaic, Tau02-DB12 values were prioritized over Tau02-DB14 values
and Tau02 values (DB12/14) were prioritized over Tau00-DB12 values.
When the derived bathymetry mosaic was integrated with multibeam
bathymetry to create the final procuct, sonar depth values were
prioritized over derived depths. A detailed description of all
processing steps is available at:
http://oregonstate.edu/~hogrefek/Cookbook/Cookbook_042108.pdf
- Process_Date: 20100501
- 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: 2187
- Column_Count: 4001
- 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: -2
- Transverse_Mercator:
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- Scale_Factor_at_Central_Meridian: 0.999600
- Longitude_of_Central_Meridian: -171.000000
- Latitude_of_Projection_Origin: 0.000000
- False_Easting: 500000.000000
- False_Northing: 10000000.000000
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: Row and Column
- Coordinate_Representation:
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- Abscissa_Resolution: 5.000000
- Ordinate_Resolution: 5.000000
- 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
- Distribution_Information:
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- Distributor:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: NOAA PIFSC CRED PIBHMC and DJLab OSU
- Contact_Person: Kyle Hogrefe
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: 104 Wilkinson Hall, Oregon State University
- City: Corvallis
- State_or_Province: Oregon
- Postal_Code: 97331
- Country: USA
- Contact_Voice_Telephone: 541-737-2397
- Contact_Electronic_Mail_Address: hogrefek@geo.oregonstate.edu
- Resource_Description: Downloadable Data
- Distribution_Liability:
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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:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: Arc Grid
- Format_Information_Content:
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Arc Grid can be opened directly using
ArcMap or ArcCatalog.
- Digital_Transfer_Option:
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- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name: http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tau_bathy.htm
- Fees: None
- Metadata_Reference_Information:
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- Metadata_Date: 20200329
- Metadata_Review_Date: 20100823
- Metadata_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Kyle Hogrefe
- Contact_Organization: NOAA PIFSC CRED PIBHMC and DJLab OSU
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: 104 Wilkinson Hall, Oregon State University
- City: Corvallis
- State_or_Province: Oregon
- Postal_Code: 97331
- Country: USA
- Contact_Voice_Telephone: 541-740-8444
- Contact_Electronic_Mail_Address: hogrefek@geo.oregonstate.edu
- 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:
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- CoRIS_ID: 20100823032620
- CoRIS_Children: None
- CoRIS_Beginning_Date: 20021107
- CoRIS_Ending_Date: 20040212
- CoRIS_Metadata_Link:
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https://www.coris.noaa.gov/metadata/records/html/tau_dbmb_mos_metadata.html
- CoRIS_Tracking_ID: 4951
Generated by mp version 2.9.48 on Thu Apr 25 10:45:37 2024