Regional Bathymetry - Samoa

Table of Contents



IDENTIFICATION_INFORMATION

Citation: Citation_Information: Originator: Dawn Wright, from Smith and Sandwell marine gravity Publication_Date: 200110422 Title: Regional Bathymetry - Samoa Edition: 1.0 Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Corvallis, OR Publisher: Dawn Wright Other_Citation_Details: Online_Linkage: HTTP://dusk.geo.orst.edu/djl/samoa Larger_Work_Citation: Citation_Information: Originator: Smith, W.H.F. and Sandwell, D.T. Publication_Date: 1997 Title: Global Seafloor Topography from Satellite Altimetry Publication_Information: Publication_Place: Scripps Publisher: Science, 277:1957-1962, 26 Sept, 1997 Online_Linkage: HTTP://topex.ucsd.edu/cgi-bin/get_data.cgi Description: Abstract: This grid was derived ASCII xyzs made available from the Smith and Sandwell estimated bathymetry. The data were gridded in MbSystem and then converted to Arc format with ArcGMT. The grid resolution is 1 km. Purpose: The grid should provide a very rough idea of the regional bathymetry, supplemental to detailed multibeam surveys for the Fagatele Bay National Marine Sanctuary, American Samoa. Supplemental_Information: Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20010422 Ending_Date: 20010422 Currentness_Reference: publication data Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -174.0045 East_Bounding_Coordinate: -166.9910 North_Bounding_Coordinate: -12.9955 South_Bounding_Coordinate: -15.0045 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: bathymetry Theme_Keyword: DEM Theme_Keyword: altimetry Place: Place_Keyword_Thesaurus: None Place_Keyword: Pacific Place_Keyword: American Samoa Place_Keyword: Western Samoa Place_Keyword: Samoa Access_Constraints: none Use_Constraints: none Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Fagatele Bay National Marine Sanctuary Contact_Person: Dawn Wright Contact_Position: collaborator Contact_Address: Address_Type: mailing and physical address Address: 104 Wilkinson Hall, Oregon State University Geosciences City: Corvallis State_or_Province: OR Postal_Code: 97331-5506 Country: USA Contact_Voice_Telephone: 541-737-1229 Contact_Facsimile_Telephone: 541-737-1200 Contact_Electronic_Mail_Address: dawn@dusk.geo.orst.edu Hours_of_Service: noon to 5 p.m. (email is best) Native_Data_Set_Environment: ESRI Grid format c:\workspace\samoa_bathy Top

DATA_QUALITY_INFORMATION

Attribute_Accuracy: Attribute_Accuracy_Report: Logical_Consistency_Report: Completeness_Report: Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Publication_Date: Title: Edition: Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Publisher: Other_Citation_Details: Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: Publication_Date: Title: Publication_Information: Publication_Place: Publisher: Online_Linkage: Source_Scale_Denominator: Type_of_Source_Media: Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Ending_Date: Source_Currentness_Reference: Source_Citation_Abbreviation: Source_Contribution: Process_Step: Process_Description: -13 186 193 -174 -167 -15 Download xyz data from Scripps: http: HTTP://topex.ucsd.edu/cgi-bin/get_data.cgi Smith, W. H. F., and D. T. Sandwell, Global seafloor topography from satellite altimetry and ship depth soundings, Science, v. 277, p. 1957-1962, 26 Sept., 1997.) awk '{print $1, $2, -1*$3}' < samoa.xyz > samoa_pos.xyz Grid in MBSystem: mbgrid -Idatalist -E1000/1000/m -R186/193/-15/-13 -Osamoanew -A1 -N -C5 -X0.1 -V "datalist" = samoa_pos.xyz 0 MBGRID Parameters: List of input files: datalist Output fileroot: samoanew2 Input Data Type: Bathymetry Gridding algorithm: Gaussian Weighted Mean Grid projection: Geographic Grid dimensions: 757 222 Grid bounds: Longitude: 186.0000 193.0000 Latitude: -15.0000 -13.0000 Working grid dimensions: 907 266 Working Grid bounds: Longitude: 185.3056 193.6944 Latitude: -15.1991 -12.8009 Longitude interval: 0.009259 degrees or 1000.314434 m Latitude interval: 0.009050 degrees or 1001.260503 m Specified Longitude interval: 1000.000000 meters Specified Latitude interval: 1000.000000 meters Input data bounds: Longitude: 176.9167 202.0833 Latitude: -17.5973 -10.4027 Gaussian filter 1/e length: 1.000000 grid intervals Spline interpolation applied with clipping dimension: 5 Spline tension (range 0.0 to infinity): 10000000000.000000 Grid format 3: GMT version 2 grd (netCDF) NaN values used to flag regions with no data MBIO parameters: Ping averaging: 1 Longitude flipping: 0 Speed minimum: 0.0 km/hr 13122 data points processed in samoa_pos.xyz 13122 total data points processed Making raw grid... Doing spline interpolation with 13122 data points... Total number of bins: 241262 Bins set using data: 13122 Bins set using interpolation: 162506 Bins not set: 65634 Maximum number of data in a bin: 1 Minimum value: -2829.34 Maximum value: 7745.83 Minimum sigma: 0.00006 Maximum sigma: 23.74090 Outputting results... executing mbm_grdplot... mbm_grdplot -Isamoanew2.grd -G1 -C -D -V -L"File samoanew2.grd - Bathymetry Grid :Depth (m)" grdedit samoanew.grd -R-174/-167/-15/-13 grdinfo samoanew2.grd samoanew2.grd: Title: Bathymetry Grid samoanew2.grd: Command samoanew2.grd: Remark Projection: Geographic This grid created by program MBGRID MB-system Version 4.3 Run by user on cpu at 7 y_min: -15 y_max: -13 y_inc: 0.00904977 units: Latitude ny: 222 samoanew2.grd: zmin: -2829.34 zmax: 7745.83 units: Depth (m) samoanew2.grd: scale_factor: 1 add_offset: 0 cp samoanew2.grd ../samoa.grd cd .. gmt2arc samoa.grd samoa_bathy Arc: samoa_bathy.ascii samoa_bathy float export grid samoa_bathy samoa_bathy Source_Used_Citation_Abbreviation: Process_Date: Source_Produced_Citation_Abbreviation: Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Organization: Contact_Person: Contact_Position: Contact_Address: Address_Type: mailing and physical address Address: City: State_or_Province: Postal_Code: Country: Contact_Voice_Telephone: Contact_Facsimile_Telephone: Contact_Electronic_Mail_Address: Hours_of_Service: Top

SPATIAL_DATA_ORGANIZATION_INFORMATION

Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 222 Column_Count: 775 Top

SPATIAL_REFERENCE_INFORMATION

Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: Longitude_Resolution: Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: Denominator_of_Flattening_Ratio: Top

ENTITY_AND_ATTRIBUTE_INFORMATION

Overview_Description: Entity_and_Attribute_Overview: Entity_and_Attribute_Detail_Citation: Top

DISTRIBUTION_INFORMATION

Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Fagatele Bay National Marine Sanctuary Contact_Person: Dawn Wright Contact_Position: collaborator Contact_Address: Address_Type: mailing and physical address Address: 104 Wilkinson Hall, Oregon State University Geosciences City: Corvallis State_or_Province: OR Postal_Code: 97331-5506 Country: USA Contact_Voice_Telephone: 541-737-1229 Contact_Facsimile_Telephone: 541-737-1200 Contact_Electronic_Mail_Address: dawn@dusk.geo.orst.edu Hours_of_Service: noon to 5 p.m. (email is best) Resource_Description: Distribution_Liability: Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name:ArcInfo export interchange file (.e00) Digital_Transfer_Option: Offline_Option: Offline_Media: none Recording_Format: N/A Compatibility_Information: ArcInfo, ArcView, ArcExplorer Fees: none Ordering_Instructions: email dawn@dusk.geo.orst.edu or Fagatele Bay National Marine Sanctuary office (Nancy.Daschbach@noaa.gov) Top

METADATA_REFERENCE_INFORMATION

Metadata_Date: 20010504 Metadata_Review_Date: 20010504 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Fagatele Bay National Marine Sanctuary Contact_Person: Dawn Wright Contact_Position: collaborator Contact_Address: Address_Type: Mailing and physical address Address: 104 Wilkinson Hall, Oregon State University Geosciences City: Corvallis State_or_Province: OR Postal_Code: 97331-5506 Country: USA Contact_Voice_Telephone: 541-737-1229 Contact_Facsimile_Telephone: 541-737-1200 Contact_Electronic_Mail_Address: dawn@dusk.geo.orst.edu Hours_of_Service: noon to 5 p.m. (email is best) Metadata_Standard_Name: FGDC CSDGM Metadata_Standard_Version: FGDC-STD-001-1998 Top