Identification_Information: Citation: Citation_Information: Originator: NOAA Pacific Island Fisheries Science Center Coral Reef Ecosystem Division Benthic Habitat Mapping Group Publication_Date: 20051231 Title: Gridded bathymetry of Nihoa Island, Hawaii, USA Geospatial_Data_Presentation_Form: digital data Online_Linkage: http://www.soest.hawaii.edu/pibhmc Description: Abstract: Gridded bathymetry of the shelf environment of Nihoa Island, Hawaii, USA. Bottom coverage was achieved in depths between 20 and 200 meters. The bathymetry dataset includes Simrad EM300 and EM3002d multibeam data collected as of December 2005. Purpose: This grid was created using data gathered from multibeam soundings for use as a planning and reference document. The data are also being used for benthic habitat mapping, for locating Essential Fish Habitat, and for studying geologic features of the area. Refer to supplemental information for description of instrument and survey. Supplemental_Information: Data were collected aboard the NOAA Ship Hi’ialakai, a 218’ United States National Oceanographic and Atmospheric Agency research ship. The NOAA Ship Hiialakai's survey sensors include a 30 kHz Simrad EM300 sonar and a 300 kHz Simrad EM3002d sonar, which provide bathymetry and imagery data, a TSS/Applanix POS/MV Model 320, which measures position, velocity, attitude and heading, and a Seabird SBE 9/11 plus CTD used to measure sound velocity profiles. Specific equipment configurations are documented in cruise metadata from the following cruises: HI0501 Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20050404 Ending_Date: 20050428 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -162.028895 East_Bounding_Coordinate: -161.723391 North_Bounding_Coordinate: 23.192274 South_Bounding_Coordinate: 22.998581 Keywords: Theme: Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus Version 1.0 Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Bathymetry Theme_Keyword: Multibeam sonar Place: Place_Keyword_Thesaurus: None Place_Keyword: Nihoa Island Place_Keyword: Hawaii Place_Keyword: Northwestern Hawaiian Islands Place_Keyword: United States of America Place: Place_Keyword_Thesaurus: CoRIS Place Thesaurus Version 1.0 Place_Keyword: OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Nihoa Island Place_Keyword: COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu Access_Constraints: Use_Constraints: These data are not to be used for navigation purposes. Please acknowledge NOAA (Office of Ocean Exploration and the Pacific Islands Fisheries Science Center) and the Joint Institute for Marine and Atmospheric Research (JIMAR) University of Hawaii as the sources of this information. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA and the Joint Institute for Marine and Atmospheric Research (JIMAR) Contact_Person: Jonathan Weiss Contact_Address: Address_Type: mailing and physical address Address: 1680 East-West Road POST 833 City: Honolulu State_or_Province: HI Postal_Code: 96822 Country: USA Contact_Voice_Telephone: 808-956-5239 Contact_Electronic_Mail_Address: jonathan.weiss@noaa.gov Browse_Graphic: Browse_Graphic_File_Name: Nihoa_5m.jpg Browse_Graphic_File_Description: Multibeam Bathymetry Browse_Graphic_File_Type: JPG Data_Set_Credit: Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA and the Joint Institute for Marine and Atmospheric Research (JIMAR) Native_Data_Set_Environment: Generic Sensor Format multibeam data processed with SAIC SABER processing software on LINUX operating system computers 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: Variable, see process description Horizontal position accuracy: Variable, see process description Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Variable, see process description Raw sounding resolution: Variable, see process description Lineage: Process_Step: Process_Description: Specifics of data processing are recorded in cruise metadata. Process_Date: 20051231 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 6183 Column_Count: 4172 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Coordinate_Representation: Abscissa_Resolution: 5 Ordinate_Resolution: 5 Planar_Distance_Units: meters 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 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 meters Depth_Distance_Units: meters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Depth values are real values based on the average of the soundings that fell within the extracted grid cells. The number of soundings per grid cell range from >1000 soundings in shallow depths to as few as 20 soundings in deeper areas. A total error budget for this survey has not been developed. Therefore, the accuracy of depth measurements should be considered to be within 1 meter. Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA and the Joint Institute for Marine and Atmospheric Research (JIMAR) Contact_Person: John Rooney Contact_Position: Coastal Geomorphologist Contact_Address: Address_Type: mailing and physical address Address: 1680 East-West Road, POST 833 City: Honolulu State_or_Province: Hawaii Postal_Code: 96822 Country: USA Contact_Voice_Telephone: 808-956-9729 Contact_Electronic_Mail_Address: john.rooney@noaa.gov Contact_Person: Joyce Miller Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical address Address: 1680 East-West Road, POST 833 City: Honolulu State_or_Province: Hawaii Postal_Code: 96822 Country: USA Contact_Voice_Telephone: 808-956-5239 Contact_Electronic_Mail_Address: joyce.miller@noaa.gov 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: Arc ASCII Digital_Transfer_Information: Format_Name: Arc ASCII Format_Information_Content: Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.soest.hawaii.edu/pibhmc Fees: None Metadata_Reference_Information: Metadata_Date: 200603 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA and the Joint Institute for Marine and Atmospheric Research (JIMAR) Contact_Person: Emily Lundblad Contact_Position: GIS Specialist Contact_Address: Address_Type: mailing and physical address Address: 1680 East-West Road POST 833 City: Honolulu State_or_Province: Hawaii Postal_Code: 96822 Country: USA Contact_Voice_Telephone: 808-592-2698 Contact_Electronic_Mail_Address: emily.lundblad@noaa.gov Contact_Person: Jonathan Weiss Contact_Position: Seafloor Mapping Specialist Contact_Address: Address_Type: mailing and physical address Address: 1680 East-West Road POST 833 City: Honolulu State_or_Province: Hawaii Postal_Code: 96822 Country: USA Contact_Voice_Telephone: 808-592-2192 Contact_Electronic_Mail_Address: jonathan.weiss@noaa.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None