rugged: Terrain Ruggedness Index for the Stellwagen Bank Mapping Project

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator: Page C. Valentine

Publication_Date: 2005

Title:

rugged: Terrain Ruggedness Index for the Stellwagen Bank Mapping Project

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Woods Hole, MA

Publisher: U.S. Geological Survey

Online_Linkage:

\\SGRIFFEE\C$\Documents and Settings\Sarah Griffee\My Documents\Page\dataforcd\rugged

Larger_Work_Citation:

Citation_Information:

Originator: Page C. Valentine

Publication_Date: 2005

Title:

Sea Floor Image Maps Showing Topography, Sun-illuminated Topography, Backscatter Intensity, Ruggedness and Slope, and the Distribution of Boulder Ridges and Bedrock Outcrops in the Stellwagen Bank National Marine Sanctuary Region off Boston, Massachusetts

Edition: 1.0

Geospatial_Data_Presentation_Form: CD-ROM

Series_Information:

Series_Name: U.S. Geological Survey Scientific Investigations Series Map

Issue_Identification: SI-2840

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Description:

Abstract:

The Terrain Ruggedness Index (TRI) calculates the average difference in elevation between a small area (a center pixel of 13 x 13 m) and its surrounding area (neighboring pixels). The TRI was applied to the digital bathymetric grids of the seafloor of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts.

Purpose:

The Terrain Ruggedness Index provides an interpretation of the seabed features in the highly variable geomorphology of the Stellwagen Bank National Marine Sanctuary region. The seabed geometry is variable due to its glacial origin and is important to the region's wide range of habitats and high biodiversity.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2005

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.600077

East_Bounding_Coordinate: -70.033436

North_Bounding_Coordinate: 42.800106

South_Bounding_Coordinate: 42.083366

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: Geographic Information Systems

Theme_Keyword: GIS

Theme_Keyword: Woods Hole Field Center

Theme_Keyword: United States Geological Survey

Theme_Keyword: USGS

Theme_Keyword: topographic data

Theme_Keyword: sea floor topography

Theme_Keyword: bathymetry

Theme_Keyword: ruggedness

Theme_Keyword: terrain ruggedness index

Theme_Keyword: TRI

Theme_Keyword: sea floor features

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Massachusetts

Place_Keyword: MA

Place_Keyword: Stellwagen Bank National Marine Sanctuary

Place_Keyword: SBNMS

Place_Keyword: Shallow EEZ

Place_Keyword: EEZ

Place_Keyword: Gulf of Maine

Place_Keyword: Atlantic Ocean

Place_Keyword: Boston

Access_Constraints: none

Use_Constraints: none

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Page C. Valentine

Contact_Organization: U.S. Geological Survey

Contact_Position: Research Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: U.S. Geological Survey

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2239

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: pvalentine@usgs.gov

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535

Data_Quality_Information:

Lineage:

Process_Step:

Process_Description:

The Terrian Ruggedness Index is based on an elevation index described by Riley and others (1999) where the sum change in elevation between a grid cell and its eight neighboring grid cells is calculated by squaring the eight differences in elevation, summing the squared differences, and taking the square root of the sum. Here, the index has been modified to calculate the average of the absolute values of the eight differences in elevation. The TRI was applied to the bathymetric grids by running a macro in ArcMap's Visual Basic editing environment. Artifacts of data collection were removed by hand editing and applying a mean filter (the Neighborhood Statistics function in Spatial Analyst was used to calculate a mean TRI for a 3x3 pixel template of TRI values centered over each pixel in the image).

Source_Used_Citation_Abbreviation: M:\Ruggedness\Rugged_Clipped\allruggedgrid

Process_Step:

Process_Description: Dataset copied.

Source_Used_Citation_Abbreviation: K:\Ruggedness\rugged_sbnms_clipped\allruggedgrid

Process_Step:

Process_Description: Dataset copied.

Source_Used_Citation_Abbreviation:

C:\Documents and Settings\Sarah Griffee\My Documents\Page\rugged

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 6201

Column_Count: 3631

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Mercator

Mercator:

Standard_Parallel: 41.650000

Longitude_of_Central_Meridian: -70.316667

False_Easting: 0.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 13.000000

Ordinate_Resolution: 13.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Distribution_Information:

Resource_Description: Downloadable Data

Distribution_Liability:

This publication was prepared by members of the US Geological Survey. Neither USGS or the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 85.860

Metadata_Reference_Information:

Metadata_Date: 20050721

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Page C. Valentine

Contact_Position: Research Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: U.S. Geological Survey

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-457-2239

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: pvalentine@usgs.gov

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