Mosaic of gridded multibeam bathymetry and bathymetry derived from multispectral IKONOS satellite imagery of Tutuila Island, American Samoa, USA

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
Gaia Geo-Analytical 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: 20090807
Title:
Mosaic of gridded multibeam bathymetry and bathymetry derived from multispectral IKONOS satellite imagery of Tutuila Island, American Samoa, USA
Geospatial_Data_Presentation_Form: raster digital data
Online_Linkage:
<http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tutuila_bathy.htm>
Description:
Abstract:
Gridded multibeam bathymetry is integrated with bathymetry derived from multispectral IKONOS satellite data. Gridded (5 m cell size) multibeam bathymetry collected aboard NOAA Ship Hiialaka'i and R/V AHI. Bathymetry values shallower than 25 m were derived by gauging the relative attenuation of blue and green spectral radiance as a function of depth. A multiple linear regression analysis of linearized blue and green band 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 and spatial coverage of the final derived bathymetry product. Digital image processing to derive depths conducted with the ENVI 4.5 software program while data editing and integration was performed using ArcGIS 9.3. This dataset is for the shelf environment of Tutuila Island, American Samoa, USA.
Purpose:
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:
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, Tutuila_5m.asc.txt <http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tutuila.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 original product metadata, po_60736_metadata.txt, po_61091_metadata.txt, PO_65904_METADATA.txt, PO_65907_METADATA.txt and PO_65909_METADATA.txt. (<http://www.soest.hawaii.edu/pibhmc/>)
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20001126
Ending_Date: 20060313
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -170.928197
East_Bounding_Coordinate: -170.484814
North_Bounding_Coordinate: -14.195351
South_Bounding_Coordinate: -14.384053
Keywords:
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword:
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
Theme_Keyword:
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
Theme_Keyword:
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > IKONOS
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Slope
Theme_Keyword: Bathymetry
Theme_Keyword: Multibeam sonar
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: 006
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Bathymetry
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Tutuila Island
Place_Keyword: American Samoa
Place_Keyword: United States of America
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
OCEAN BASIN > Pacific Ocean > American Samoa > Tutuila Island (14S170W0016)
Place_Keyword:
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Tutuila Island (14S170W0016)
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: AmSam
Access_Constraints: None
Use_Constraints:
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:
Browse_Graphic_File_Name:
<http://www.soest.hawaii.edu/pibhmc/amsamoa_images/Tut_bathymetry_mb&IKONOS_445.jpg>
Browse_Graphic_File_Description: Gridded Bathymetry
Browse_Graphic_File_Type: jpeg
Data_Set_Credit:
NOAA PIFSC CRED, the Pacific Islands Benthic Habitat Mapping Center and Davey Jones Locker GIS Laboratory Oregon State University
Security_Information:
Security_Classification_System: Not applicable
Security_Classification: Unclassified
Security_Handling_Description: Not applicable
Native_Data_Set_Environment:
ArcGIS ASCII file or ArcGIS Grid file, bathymetry derived from 4x4m multispectral satellite imagery (IKONOS) using ENVI 4.5, multibeam and derived bathymetry were integrated using ArcGIS 9.3

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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:
These data are believed to be logically consistent though no tests were performed
Completeness_Report: Complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal positioning system: GPS C/A Horizontal position accuracy: 25 meters
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
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:
Process_Step:
Process_Description:
Multiple tools in ENVI 4.5 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). Seventeen derived products, four from the image otutu_msi_61091.img (Tut091), two from the image otutu_msi_60736.img (Tut736), four from the image otutu_msi_65904.img (Tut904), three from the image otutu_msi_65907 (Tut907) and four from the image otutu_msi_65909.img (Tut909), were integrated to expand spatial coverage. The original MLR variables for Tut091 were Yint=19.7602, Mblue=-1.6871, and Mgreen=12.3928. The product derived from these variables (Tut091_DB) was mosaiced with three additional products derived using increasingly reduced Y-intercept values as follows: Yint=15.7602 (Tut091_DB4), Yint=11.7602 (Tut091_DB8), Yint=7.7602 (Tut091_DB12). This was done to increase coverage in shallow areas. More information on this integration process is provided in the product error analysis, availble from PIBHMC upon request. The original MLR variables for Tut736 were Yint=-4.3919, Mblue=-8.6422, and Mgreen=12.2726. The product derived from these variables (Tut736_DB) was mosaiced with one additional product (Tut736_DB4) with a decreased Y-intercept value of -8.3919. This was done to increase coverage in shallow areas. More information on this integration process is provided in the product error analysis, availble from PIBHMC upon request. The original MLR variables for Tut904 were Yint=2.8541, Mblue=-18.3048, and Mgreen=25.7446. The product derived from these variables (Tut904_DB) was mosaiced with three additional products derived using increasingly reduced Y-intercept values as follows: Yint=-1.1459 (Tut904_DB4), Yint=-5.1459 (Tut904_DB8) and Yint=-9.1459 (Tut904_DB12). This was done to increase coverage in shallow areas. More information on this integration process is provided in the product error analysis, availble from PIBHMC upon request. The original MLR variables for Tut907 were Yint=-5.4039, Mblue=-13.7452, and Mgreen=18.3747. The product derived from these variables (Tut907_DB) was mosaiced with two additional products derived using increasingly reduced Y-intercept values as follows: Yint=-9.4039 (Tut907_DB4), Yint=-13.4039 (Tut907_DB8). This was done to increase coverage in shallow areas. More information on this integration process is provided in the product error analysis, availble from PIBHMC upon request. The original MLR variables for Tut909 were Yint=17.1093, Mblue=-1.2295, and Mgreen=11.0006. The product derived from these variables (Tut909_DB) was mosaiced with three additional products derived using increasingly reduced Y-intercept values as follows: Yint=13.1093 (Tut909_DB4), Yint=9.1093 (Tut909_DB8) and Yint=5.1093 (Tut909_DB12). This was done to increase coverage in shallow areas. More information on this integration process is provided in the product error analysis, availble from PIBHMC upon request. The derived bathymetry from each image was in turn mosaiced prioritizing image data in the following order (highest to lowest): Tut091, Tut909, Tut907, Tut736 and Tut904. Data with better statistical accuracy was given higher "priority" so that they replaced concurrent data with lower accuracy during the mosaic process. This mosaiced derived bathymetry product (Tut_DBall) was then resampled to a 5 meter grid and integrated with the multibeam sonar data, with sonar data prioritized over the derived data, to create the final product (Tut_DBMB). A detailed description of all processing steps is available at: <http://dusk.geo.orst.edu/djl/theses/kyle/Cookbook_042108.pdf> An error analysis of each derived bathymetry grid used is available upon request.
Process_Date: 20090805

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 4162
Column_Count: 9559
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: -2
Transverse_Mercator:
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:
Planar_Coordinate_Encoding_Method: Row and Column
Coordinate_Representation:
Abscissa_Resolution: 5.000000
Ordinate_Resolution: 5.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA PIFSC CRED PIBHMC and DJLab OSU
Contact_Person: Kyle Hogrefe
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
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: Arc Grid
Format_Information_Content:
Arc Grid can be opened directly using ArcMap or ArcCatalog.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tutuila_bathy.htm>
Fees: None

Metadata_Reference_Information:
Metadata_Date: 20140312
Metadata_Review_Date: 20091222
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
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:
CoRIS_ID: 20091222065020
CoRIS_Children: None
CoRIS_Beginning_Date: 20001126
CoRIS_Ending_Date: 20060313
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/tut_dbmb_metadata.html>
CoRIS_Tracking_ID: 4384

Generated by mp version 2.9.13 on Tue Sep 16 10:43:19 2014