Mosaic of 5 m gridded multibeam bathymetry and bathymetry derived from multispectral IKONOS satellite imagery of Alamagan Island, Commonwealth of Northern Mariana Islands, 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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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: 20090818
- Title:
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Mosaic of 5 m gridded multibeam bathymetry and bathymetry derived from
multispectral IKONOS satellite imagery of Alamagan Island, Commonwealth of
Northern Mariana Islands, USA
- Geospatial_Data_Presentation_Form: raster digital data
- Online_Linkage: http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_ala_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 (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 Alamagan Island, Commonwealth of
Northern Mariana Islands, USA.
- 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,
alamagan_10m.txt
http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_ala.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_107146_metadata.txt
and po_135475_metadata.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: 20030331
- Ending_Date: 20070608
- 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: 145.802157
- East_Bounding_Coordinate: 145.859205
- North_Bounding_Coordinate: 17.624929
- South_Bounding_Coordinate: 17.567343
- 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 - Commonwealth of the Northern Mariana Islands and Guam
- Theme_Keyword: 1398
- 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: 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
- 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: Alamagan Island
- Place_Keyword: Commonwealth of Northern Mariana Islands
- Place_Keyword: United States of America
- Place:
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- Place_Keyword_Thesaurus: CoRIS Region
- Place_Keyword: CNMI
- Place:
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- Place_Keyword_Thesaurus: CoRIS Place Thesaurus
- Place_Keyword:
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OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Alamagan Island > Alamagan Island (17N145E0002)
- Place_Keyword:
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COUNTRY/TERRITORY > Northern Mariana Islands > Alamagan Island > Alamagan Island (17N145E0002)
- 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/CNMI_images/ala_bathymetry_mb&IKONOS_5m_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 4.5, 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 4.5 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). Eight derived
products, four from the image alamagan_107146_msi_rat.pix (Ala146) and four from
the image alamagan_135475_msi_rat.pix (Ala475), were integrated to expand spatial
coverage.
The original MLR variables for Ala146 were Yint=15.1542, Mblue=-10.3798, and
Mgreen=24.3859. The product derived from these variables (Ala146_DB) was mosaiced
with three additional products derived using increasingly reduced Y-intercept values
as follows: Yint=11.1542 (Ala146_DB4), Yint=7.1542 (Ala146_DB8), Yint=3.1542
(Ala146_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 Ala475 were Yint=12.0276, Mblue=-6.3664, and
Mgreen=16.1327. The product derived from these variables (Ala475_DB) was mosaiced
with three additional products derived using increasingly reduced Y-intercept values
as follows: Yint=8.0276 (Ala475_DB4), Yint=4.0276 (Ala475_DB8), Yint=0.0276
(Ala475_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 the data from
Ala146 over Ala475. 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 (Ala_DBall) was then resampled to a 5 meter
grid and integrated with 5m resolution multibeam sonar data, with sonar data prioritized
over the derived data, to create the final product (Ala_DBMB_5m).
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: 20090814
- 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: 1267
- Column_Count: 1203
- 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: 55
- Transverse_Mercator:
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- 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:
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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: 541-740-8444
- 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_cnmi_ala_bathy.htm
- Fees: None
- Metadata_Reference_Information:
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- Metadata_Date: 20200329
- Metadata_Review_Date: 20091222
- 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:
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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: 541-740-8444
- 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: 20091222053918
- CoRIS_Children: None
- CoRIS_Beginning_Date: 20030331
- CoRIS_Ending_Date: 20070608
- CoRIS_Metadata_Link:
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https://www.coris.noaa.gov/metadata/records/html/ala_dbmb_5m_metadata.html
- CoRIS_Tracking_ID: 4374
Generated by mp version 2.9.48 on Tue Oct 3 11:02:29 2023