Preliminary hard and soft bottom seafloor substrate map derived from an supervised classification of bathymetry derived from multispectral World View-2 satellite imagery of Ni'ihau Island, Territory of Main Hawaiian 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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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: 20130404
- Title:
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Preliminary hard and soft bottom seafloor substrate map
derived from an supervised classification of bathymetry derived
from multispectral World View-2 satellite imagery of Ni'ihau Island,
Territory of Main Hawaiian Islands, USA
- Geospatial_Data_Presentation_Form: digital data
- Online_Linkage: http://www.soest.hawaii.edu/pibhmc/
- Online_Linkage:
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http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/main-hawaiian-islands/nihau/geomorphology/
- Description:
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- Abstract:
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Preliminary hard and soft seafloor substrate map derived
from a supervised classification from multispectral World View-2 satellite
imagery of Ni'ihau Island, Territory of Main Hawaiian Islands, USA.
The dataset was derived using multipectral World View-2 satellite data.
Limited groundtruthing data are available for Ni'ihau Island and therefore
we are unable to evaluate the accuracy of the supervised
classification seafloor substrate map.
- Purpose:
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The hard and soft seafloor map is being used to improve
sampling techniques for long-term ecosystem monitoring, to guide
future ground-truthing operations and to identify coral-rich and
species specific environments. This is a preliminary product and
the methods used to generate the map are currently being evaluated
for their accuracy.
- Supplemental_Information:
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Geographic Information System (GIS) projects and National Ocean Service's
(NOS) coral mapping activities. Orthographically corrected World View-2 Imagery
was provided by USGS, State of Hawaii and USDA. The metadata for this World View-2
imagery is documented in the original product metadata,
10JAN02213954-M3XM-052386144080_01_P001.(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: 20050613
- Ending_Date: 20130315
- 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: -160.254655
- East_Bounding_Coordinate: -155.254655
- North_Bounding_Coordinate: 22.0298068
- South_Bounding_Coordinate: 17.0298068
- 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 in the Pacific Islands Region
- Theme_Keyword: 467
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
- Theme_Keyword:
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EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats
- Theme_Keyword:
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EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Rugosity
- Theme_Keyword:
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EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping
- Theme_Keyword:
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EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping
- Theme_Keyword:
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EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping
- Theme_Keyword:
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EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > WorldView-2
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: imageryBaseMapsEarthCover
- Theme_Keyword: 010
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
- Theme_Keyword: Geographic Information > Habitats
- Place:
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- Place_Keyword_Thesaurus: None
- Place_Keyword: Niihau
- Place_Keyword: Hawaii
- 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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COUNTRY/TERRITORY > United States of America > Hawaii > Kauai > Niihau Island (21N160W0001)
- Place_Keyword:
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OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Niihau Island > Niihau Island (21N160W0001)
- 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 (PIFSC) Coral Reef Ecosystem Division (CRED) and
the Pacific Islands Benthic Habitat Mapping Center (PIBHMC), and
the Joint Institute for Marine and Atmospheric Research (JIMAR)
and School of Ocean and Earth Science and Technology (SOEST),
University of Hawaii as the sources of this information.
- Point_of_Contact:
-
- Contact_Information:
-
- 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), NOAA National Marine Fisheries Service (NMFS)
- Contact_Address:
-
- Address_Type: mailing and physical
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Country: USA
- Contact_Voice_Telephone: 808 725-5360
- 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/Niihau_WV2_hs_445.jpg
- Browse_Graphic_File_Description: Hard and Soft Seafloor Substrate
- Browse_Graphic_File_Type: JPEG, PDF
- Data_Set_Credit: PIBHMC, CRED, PIFSC, NOAA, and JIMAR
- Security_Information:
-
- Security_Classification_System: Not applicable
- Security_Classification: Unclassified
- Security_Handling_Description: Not applicable
- 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 (SPS)
Horizontal position accuracy: 25 meters
- Vertical_Positional_Accuracy:
-
- Vertical_Positional_Accuracy_Report:
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1 m
Range resolution of sonar ~1.25 cm
Raw sounding resolution: Variable
Vertical accuracy of gridded product: 1% of water depth
- Lineage:
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- Process_Step:
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- Process_Description:
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Image preporcessing steps are described in the metadata file for WV-2 derived depths and
can be found at www.soest.hawaii.edu/pibhmc.
The pre-processed and de-glinted image was loaded into ENVI 4.8.software.
Six different types of regions of interest (ROI's) were created in ENVI 4.8. The ROI's are classified as followed:
1. shallow soft/sand
2. medium deep soft/sand
3. deep soft/sand
4. shallow hard
5. medium deep hard
6. deep hard
The Image classification was performed seperately on the multi-band image using three different methods. The MahalanobisDistance Classification,
which is a direction sensitive distance classifier. J.A.Richards, 1999, Remote Sensing Digital Image Analysis, Springer-Verlag, Berlin, p. 240.
The Maximum Likelihood Distance, which assumes that the statistics for each class in each band are normally distributed and the
Minimum Distance, which uses the mean vectors for each class and calculates the distance from ech unknowkn pixel the the mean vector for ech class.
More information about the MahalanobisDistance, Maximum LiklihoodDistance and the Minimum Distance algorithm can be found in the ENVI documentation available at
http://www.exelisvis.com/ProductsServices/ENVI/ENVI.aspx.
THe results of each of the three classifications were compiled into an ENVI standard image. The outputs were exported in a geotiff format and loaded in ArcGIS 10.1.
All land and NoData values were removed using the Arc10.1 toolbox "extracting by mask" tool. The outputs were the same six classes as previously when creating the ROI's.
THe results were reclassified using the Arc10.1 toolbox into "hard" and "soft" classes only.
- Process_Date: 20130310
- 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: 14420
- Column_Count: 9821
- 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:
-
- Scale_Factor_at_Central_Meridian: 0.9996
- Longitude_of_Central_Meridian: -159
- Latitude_of_Projection_Origin: 0
- False_Easting: 500000
- False_Northing: 0
- Planar_Coordinate_Information:
-
- Planar_Coordinate_Encoding_Method: row and column
- Coordinate_Representation:
-
- Abscissa_Resolution: 2
- Ordinate_Resolution: 2
- 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
- Vertical_Coordinate_System_Definition:
-
- 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:
-
- Overview_Description:
-
- Entity_and_Attribute_Overview: none
- Entity_and_Attribute_Detail_Citation: none
- Distribution_Information:
-
- 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), NOAA National Marine Fisheries Service (NMFS)
- Contact_Address:
-
- Address_Type: mailing and physical
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Country: USA
- Contact_Voice_Telephone: 808 725-5360
- 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: Arc ASCII
- Format_Information_Content:
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Arc ASCII can be converted to Arc Raster
using ArcToolbox Conversion Tools (ASCIItoRaster).
- Digital_Transfer_Option:
-
- Online_Option:
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- Computer_Contact_Information:
-
- Network_Address:
-
- Network_Resource_Name:
-
ftp://ftp.soest.hawaii.edu/pibhmc/website/data/mhi/benthichabitatlayers/NII_wv2_hs.zip
- Fees: None
- Metadata_Reference_Information:
-
- Metadata_Date: 20200329
- 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), NOAA National Marine Fisheries Service (NMFS)
- Contact_Address:
-
- Address_Type: mailing and physical
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Country: USA
- Contact_Voice_Telephone: 808 725-5360
- 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_Metadata_Link:
-
https://www.coris.noaa.gov/metadata/records/html/NII_wv2_hs.html
- CoRIS_Tracking_ID: 6664
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