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: 20110304 Title: Mosaic of gridded multibeam and lidar bathymetry of the US Territory of Guam Online_Linkage: http://www.soest.hawaii.edu/pibhmc Online_Linkage: http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/cnmi-guam/guam-island/bathymetry/ Description: Abstract: Gridded multibeam bathymetry is integrated with gridded lidar bathymetry. Gridded (5 m cell size) multibeam bathymetry were collected aboard NOAA Ship Hiialaka'i and R/V AHI and by the Naval Oceanographic Office and NOAA Office of Coast Survey in Apra Harbor. Lidar bathymetry were collected by the Naval Oceanographic Office and by the Joint Airborne Lidar Bathymetry Technical Center of Expertise. This dataset is for the shelf environment of the US Territory of Guam Island 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 by CRED in 2003 and 20007 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 these bathymetry is documented in the product metadata, guam_5m.txt on ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/bathymetry Multibeam data were also collected by the Naval Oceanographic Office and NOAA Office of Coast Survey in 2008, in Apra Harbor. These data are also presented in a 1-m resolution grid online, and metadata for these data are documented in the product metadata apra_bty_1m.txt on http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_apra_bathy.htm. Lidar data were provided by the Naval Oceanographic Office, and were obtained using a SHOALS airborne system during January-March 2001. Additional lidar data were collected by the Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX). These data were collected using the CHARTS system between February 18 and May 20 2007. These data are available on NGDC and more detailed metadata for these data can be found on https://coast.noaa.gov/digitalcoast//data/index.html Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20010301 Ending_Date: 20080504 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 144.608 East_Bounding_Coordinate: 145.009 North_Bounding_Coordinate: 13.727 South_Bounding_Coordinate: 13.220 Keywords: Theme: Theme_Keyword_Thesaurus: NCEI Geoportal Filter Theme_Keyword: CoRIS_Metadata Theme: Theme_Keyword_Thesaurus: CRCP Project Theme_Keyword: M218 Benthic Habitat Mapping and Characterization in the Pacific Islands Region Theme_Keyword: 1217 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: 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 Place: Place_Keyword_Thesaurus: CoRIS Place Thesaurus Place_Keyword: OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000) Place_Keyword: COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000) Place: Place_Keyword_Thesaurus: CoRIS Region Place_Keyword: Guam Access_Constraints: None Use_Constraints: These data are not to be used for navigation purposes. Please acknowledge NOAA Pacific Islands Fisheries Science Center (PIFSC) Coral Reef Ecosystem Division (CRED), the Joint Institute for Marine and Atmospheric Research (JIMAR) University of Hawaii, the NOAA Office of Coast Survey (NOAA OCS), the Naval Oceanographic Office (NAVO), and the Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX). Browse_Graphic: Browse_Graphic_File_Name: http://www.soest.hawaii.edu/pibhmc/CNMI_images/Guam_5m_bathymetry_mb&lidar_445.jpg Browse_Graphic_File_Description: Gridded Bathymetry Browse_Graphic_File_Type: JPG Data_Set_Credit: NOAA PIFSC CRED, PIBHMC, NOAA OCS, NAVO, JALBTCX Security_Information: Security_Classification_System: Not applicable Security_Classification: Unclassified Security_Handling_Description: Not applicable Native_Data_Set_Environment: ArcGIS ASCII file created in ESRI ArcMap 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: Multibeam data processing is described in the relevant metadata products (guam_5m.txt and metadata apra_bty_1m.txt) on ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/bathymetry and http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_apra_bathy.htm respectively. Lidar xyz data from the two sources (2001 data from Naval Oceanographic Office and 2007 data from the Joint Airborne Lidar Bathymetry Technical Center of Expertise) were gridded using nearneighbor, a Generic Mapping Tools (GMT) algorithm. GMT is an open source collection of tools for manipulating geographic data sets. Additional information about GMT can be found at: http://www.soest.hawaii.edu/gmt and additional information about the multibeam data processing is recorded in the cruise metadata. This results in a netCDF grid file format, which is then converted to an ArcGIS ASCII file format using LINUX/UNIX commands in combination with GMT. ArcGIS ASCII files can then be converted into raster format using ArcToolbox (Conversion Tools > To Raster > ASCII to Raster). For both lidar data sets, positive values (i.e. those on land), were removed, leaving only depth values. The four bathymetry grids were combined in ESRI ArcMap using the Mosaic Tool (ArcToolbox > Data Management Tools > Raster > Raster Dataset > Mosaic). The Mosaic Method used was "First" which allows the user to prioritize which values are used for overlapping pixels. The four bathymetry data sets were prioritized in the following order, based on the perceived accuracy of the four data sets: Apra Harbor multibeam, CRED multibeam, JALBTCX lidar, NAVO lidar. This resulted in the final combined bathymetry grid (gua_mb_ld.asc). Process_Date: 20110301 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 11155 Column_Count: 8574 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: 5.000000 Ordinate_Resolution: 5.000000 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: 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) Contact_Address: Address_Type: mailing and physical address Address: NOAA IRC Address: NMFS/PIFSC/CRED Address: 1845 WASP Blvd., Building 176 City: Honolulu State_or_Province: HI Postal_Code: 96818 Contact_Voice_Telephone: 808 725-5360 Contact_Facsimile_Telephone: 808 725-5429 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 (ASCII to Raster). Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/bathymetry/Guam_5m_Bathymetry_mb&lidar.zip Fees: None Metadata_Reference_Information: Metadata_Date: 20190605 Metadata_Review_Date: 20110906 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), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) Contact_Address: Address_Type: mailing and physical address Address: NOAA IRC Address: NMFS/PIFSC/CRED Address: 1845 WASP Blvd., Building 176 City: Honolulu State_or_Province: HI Postal_Code: 96818 Contact_Voice_Telephone: 808 725-5360 Contact_Facsimile_Telephone: 808 725-5429 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_ID: 20110906050159 CoRIS_Children: None CoRIS_Beginning_Date: 20010301 CoRIS_Ending_Date: 20080504 CoRIS_Metadata_Link: https://www.coris.noaa.gov/metadata/records/html/guam_5m_bathymetry_mb_and_lidar.html CoRIS_Tracking_ID: 6361