Identification_Information:
Citation:
Citation_Information:
Originator: 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: 20090123
Title: Mosaic of 10 m gridded multibeam bathymetry and bathymetry derived
from multispectral IKONOS satellite imagery of Asuncion Island,
Commonwealth of the Northern Marianas Islands, USA
Geospatial_Data_Presentation_Form: raster digital data
Online_Linkage: http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_asu_bathy.htm
Description:
Abstract: Gridded multibeam bathymetry is integrated with bathymetry
derived from multpectral 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 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 Asuncion Island, Commonwealth of
the Northern Marianas Islands, 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,
Asuncion_10m.txt.
http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_asu.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_107144_metadata
(https://www.soest.hawaii.edu/pibhmc/cms)
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20030403
Ending_Date: 20070608
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 145.361576
East_Bounding_Coordinate: 145.437089
North_Bounding_Coordinate: 19.727122
South_Bounding_Coordinate: 19.646644
Keywords:
Theme:
Theme_Keyword_Thesaurus: NCEI Geoportal Filter
Theme_Keyword: CoRIS_Metadata
Theme:
Theme_Keyword_Thesaurus: CRCP Project
Theme_Keyword: Benthic Habitat Mapping and Characterization - Commonwealth of the Northern Mariana Islands and Guam
Theme_Keyword: 1398
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: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: 006
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Bathymetry
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Slope
Theme_Keyword: Bathymetry
Theme_Keyword: Multibeam sonar
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Asuncion Island
Place_Keyword: Commonwealth of the Northern Marianas Islands
Place_Keyword: United States of America
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword: OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Asuncion Island > Asuncion Island (19N145E0001)
Place_Keyword: COUNTRY/TERRITORY > Northern Mariana Islands > Asuncion Island > Asuncion Island (19N145E0001)
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: CNMI
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: https://www.soest.hawaii.edu/pibhmc/CNMI_images/asu_bathymetry_mb&IKONOS_10m_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). Two
derived products from the image asuncion_107144_msi_rat.pix (Asu144),
were integrated to enhance statistical accuracy and expand spatial
coverage. The original MLR variables for Asu144 were Yint=-12.6994,
Mblue=-8.1453, and Mgreen=10.8586. Two additional products were
derived to enhance accuracy and expand coverage. The first
(Asu144_5m_DB9) was derived using increased linearized blue and green
band slope values of -16.1453 and 18.8586 to increase statistical
accuracy. The second (Asu144_5m_DB11) was derived using a increased
slope value of -8.6994 with the original linearized blue and green
band slope values. Data from Asu144_5m_DB9 replaced concurrent data
from Asu144_5m_DB11 during integration due to better statistical
accuracy.
The derived bathymetry mosaic was (Asu_DBall_mos) was then integrated
with the multibeam sonar data 10m grid, with sonar data prioritized over
derived data, to create the final product (Asu_10m_DBMB).
A detailed description of all processing steps is available at:
http://oregonstate.edu/~hogrefek/Cookbook/Cookbook_042108.pdf
An error analysis of each derived bathymetry grid used is available
upon request.
Process_Date: 20090121
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 932
Column_Count: 783
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: 55
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: 147.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and Column
Coordinate_Representation:
Abscissa_Resolution: 10.000000
Ordinate_Resolution: 10.000000
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: 541-737-2397
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_cnmi_asu_bathy.htm
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20241215
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: 20091222064604
CoRIS_Children: None
CoRIS_Beginning_Date: 20030403
CoRIS_Ending_Date: 20070608
CoRIS_Metadata_Link: https://www.coris.noaa.gov/metadata/records/html/asu_10m_dbmb_metadata.html
CoRIS_Tracking_ID: 4383