Identification_Information: Citation: Citation_Information: Originator: 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: 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: http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/main-hawaiian-islands/nihau/geomorphology/ Description: Abstract: 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: 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: Original World View-2 imagery was purchased to support the Pacific Islands 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: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20050613 Ending_Date: 20130315 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -160.254655 East_Bounding_Coordinate: -155.254655 North_Bounding_Coordinate: 22.0298068 South_Bounding_Coordinate: 17.0298068 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 in the Pacific Islands Region Theme_Keyword: 467 Theme: Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus Theme_Keyword: EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats Theme_Keyword: EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Rugosity Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > WorldView-2 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: imageryBaseMapsEarthCover Theme_Keyword: 010 Theme: Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus Theme_Keyword: Geographic Information > Habitats Place: Place_Keyword_Thesaurus: None Place_Keyword: Niihau Place_Keyword: Hawaii Place_Keyword: Main Hawaiian Islands Place_Keyword: United States of America Place: Place_Keyword_Thesaurus: CoRIS Place Thesaurus Place_Keyword: COUNTRY/TERRITORY > United States of America > Hawaii > Kauai > Niihau Island (21N160W0001) Place_Keyword: OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Niihau Island > Niihau Island (21N160W0001) Access_Constraints: None Use_Constraints: 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: 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: Browse_Graphic_File_Name: 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: 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 (SPS) Horizontal position accuracy: 25 meters Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: 1 m Range resolution of sonar ~1.25 cm Raw sounding resolution: Variable Vertical accuracy of gridded product: 1% of water depth Lineage: Process_Step: Process_Description: 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: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 14420 Column_Count: 9821 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: 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: 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: Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCIItoRaster). Digital_Transfer_Option: Online_Option: 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