Simrad EM-3000 Multibeam Bathymetry Grid (1 m), Taema Bank 2001, American Samoa

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Dawn Wright, Oregon State Univ.

Originator: Brian Donahue, Univ. of S. Florida

Publication_Date: 20040607

Title:

Simrad EM-3000 Multibeam Bathymetry Grid (1 m), Taema Bank 2001, American Samoa

Edition: 1

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Tutuila, American Samoa

Publisher: Fagatele Bay National Marine Sanctuary Office

Online_Linkage:

\\wilk204-pc4\TerraCognita4\lundblade\AmSamoa\Projects\Benthic_habitat\UTM84_final\tae01_utm\tae01_new\ntae01_1m_utm

Larger_Work_Citation:

Citation_Information:

Originator: NOAA National Ocean Service (NOS) Special Projects

Publication_Date: same as above

Publication_Time: same as above

Title: same as above

Publication_Information:

Publication_Place: same as above

Publisher: same as above

Online_Linkage: same as above

Description:

Abstract:

This is a 1-m bathymetric grid with negative depth values of high-resolution multibeam echo-soundings gathered in May 2001 by the Kongsberg Simrad EM-3000 system on a boat owned by the America Samoa Government (ASG), Dept. of Marine Wildlife Resources (DMWR). Simrad EM-3000 is a 300 kHz system that fans out up to 121 beams at a 130 deg. angle, yielding swaths that are up to 4 times the water depth. The system can capture depths in the 3-150 m range at survey speeds of 3-12 knots. With differential GPS, the system is capable of centimeter resolution with an accuracy of 10-15 cm. Grid size spacing may be 30 cm to 15 m for depths in the 3-150 m range. An AML (Applied Microsystems LTD.) sound velocity probe was used to measure sound velocities at the transducer interface in real time and conduct sound velocity casts. Velocity casts were done by lowering the sensor to a maximum of 30 meters in one meter intervals.

Purpose:

This grid is a base layer for the purposes of visual overlay and comparison with other data sets around Tutuila and subsequent spatial analyses.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20010510

Ending_Date: 20010520

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -170.676365

East_Bounding_Coordinate: -170.649497

North_Bounding_Coordinate: -14.307551

South_Bounding_Coordinate: -14.327478

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: bathymetry

Theme_Keyword: echosounding

Theme_Keyword: grid

Theme_Keyword: seafloor

Theme_Keyword: multibeam

Theme_Keyword: base layer

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: SW Pacific

Place_Keyword: Samoa

Place_Keyword: American Samoa

Place_Keyword: Tutuila

Place_Keyword: island

Place_Keyword: Pacific Islands GIS

Place_Keyword: Taema Bank

Access_Constraints: none

Use_Constraints: NOT for navigational purposes!!!

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dawn Wright

Contact_Organization: Fagatele Bay National Marine Sanctuary

Contact_Position: Collaborator

Contact_Address:

Address_Type: mailing and physical address

Address: 104 Wilkinson Hall, Oregon State University Geosciences

City: Corvallis

State_or_Province: Oregon

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 (email is best)

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700

Cross_Reference:

Citation_Information:

Originator: Emily Lundblad, Oregon State Univ.

Publication_Date: June 7, 2004

Title:

The Development and Application of Benthic Classifications for Coral Reef Ecosystems Below 30 m Depth using Multibeam Bathymetry: Tutuila, American Samoa

Series_Information:

Series_Name: Masters Thesis

Publication_Information:

Publication_Place: Oregon State University

Publisher: Department of Geosciences

Online_Linkage: <http://dusk.geo.orst.edu/djl/rogues.html>

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Depth soundings have an accuracy of ~24 m (i.e., points fall within a circle of radius 24 m). Soundings have been "cleaned" with a 2nd standard deviation filter to flag outliers (i.e., points beyond the 2nd standard deviation in Simrad bin stat post processing were flagged or removed). Tidal corrections: NOAA, verified, downloaded tide data, preliminary pressure water level data (N1) data are in meters above MLLW datum from station 1770000, Pago Pago, AS. Data have not yet been corrected with differential GPS.

Logical_Consistency_Report:

These data are believed to be logically consistent, though no tests were performed.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: 24 m

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Tidal corrections: NOAA, verified, downloaded tide data, preliminary pressure water level data (N1) data are in meters above MLLW datum from station 1770000, Pago Pago, AS.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Emily Lundblad, Oregon State Univ.

Originator: Brian Donahue, Univ. of S. Florida

Originator: Dawn Wright, Oregon State Univ.

Publication_Date: 20040607

Title:

Simrad EM-3000 Multibeam Bathymetry Grid (1m), Taema Bank 2001, American Samoa

Edition: 1

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Tutuila, American Samoa

Publisher: Fagatele Bay National Marine Sanctuary Office

Online_Linkage: <http://dusk.geo.orst.edu/djl/samoa>

Larger_Work_Citation:

Citation_Information:

Originator: NOAA National Ocean Service (NOS) Special Projects

Publication_Date: same as above

Title: same as above

Publication_Information:

Publication_Place: same as above

Publisher: same as above

Online_Linkage: same as above

Process_Step:

Process_Description:

The data were post-processed by Brian Donahue using the Caris post-processing software package. Post-processing included navigation correction, attitude editor, tide correction, and hand editing via the swath editor in Caris. Navigation editing included a linear interpolation of the points which were automatically queried for spikes in speed and time jumps. Speed jumps were set at one knot and time jumps were set at one second. The point(s) that were found to be outside these parameters were rejected and an interpolated was done from the previous point and the next point.

The Caris attitude editor was used to examine the heave, pitch, roll, and gyro information. The data was found to be very good so there was no smoothing or editing of the data. After gridding at 0.5 meters the data was analyzed line by line with the Caris swath editor. Depth spikes or points that were believed to be anomalous were flagged and rejected. The data was then regridded at 0.5 meters and exported all the accepted points in XYZ format, latitude, longitude and depth. A total of 20,734,132 points were exported. Post-processed XYZ data were gridded in Fledermaus, exported as an ArcView ascii file and converted to a raster grid with ArcToolbox.

Source_Used_Citation_Abbreviation: <http://dusk.geo.orst.edu/djl/samoa>

Process_Date: 20030624

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dawn Wright

Contact_Organization: Fagatele Bay National Marine Sanctuary

Contact_Position: Collaborator

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\LUNDBL~1\LOCALS~1\Temp\xml21B.tmp

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\Emily\LOCALS~1\Temp\xmlC.tmp

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\Emily\LOCALS~1\Temp\xml15.tmp

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\Emily\LOCALS~1\Temp\xml17.tmp

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\Emily\LOCALS~1\Temp\xml36.tmp

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 2014

Column_Count: 2650

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: -2

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -171.000000

Latitude_of_Projection_Origin: 0.000000

False_Easting: 500000.000000

False_Northing: 10000000.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 1.092212

Ordinate_Resolution: 1.092212

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

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: ntae01_1m_utm

Attribute:

Attribute_Label: ObjectID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Value

Attribute:

Attribute_Label: Count

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dawn Wright

Contact_Organization: Fagatele Bay National Marine Sanctuary

Contact_Position: Collaborator

Contact_Address:

Address_Type: mailing and physical address

Address: 104 Wilkinson Hall, Oregon State University Geosciences

City: Corvallis

State_or_Province: Oregon

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 (email is best)

Resource_Description: Downloadable Data

Distribution_Liability: NOT for navigational purposes!!!

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcInfo Interchange Export (*.e00) files

Transfer_Size: 21.737

Digital_Transfer_Option:

Offline_Option:

Offline_Media: DVD-ROM

Recording_Format: none

Compatibility_Information: ArcInfo, ArcView, ArcExplorer, ArcGIS

Ordering_Instructions: <http://dusk.geo.orst.edu/djl/samoa>

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: July 2004

Metadata_Reference_Information:

Metadata_Date: 20040605

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Oregon State University

Contact_Person: Emily Lundblad

Contact_Position: Collaborator

Contact_Address:

Address_Type: mailing and physical address

Address: 104 Wilkinson Hall, Oregon State University Geosciences

City: Corvallis

State_or_Province: Oregon

Postal_Code: 97331-5506

Country: USA

Contact_Voice_Telephone: 541-737-8818

Contact_Facsimile_Telephone: 541-737-1200

Contact_Electronic_Mail_Address: lundblae@geo.oregonstate.edu

Hours_of_Service: noon to 5 (email is best)

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile