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
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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:
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SPATIAL_DATA_ORGANIZATION_INFORMATION
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 222
Column_Count: 775
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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:
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ENTITY_AND_ATTRIBUTE_INFORMATION
Overview_Description:
Entity_and_Attribute_Overview:
Entity_and_Attribute_Detail_Citation:
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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)
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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
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