Draft Shallow Sediment Model

Metadata:


Identification Information:
Citation:
Citation Information:
Originator: Eastern Division Conservation Science office of The Nature Conservancy
Publication Date: REQUIRED: The date when the data set is published or otherwise made available for release.
Title:
Draft Shallow Sediment Model
Edition: Draft
Geospatial Data Presentation Form: raster digital data
Online Linkage: file:///N:/GIS/data/ecoregional/carolinian_marine/iteration2/sediment/March2013Kriging/sednopebs
Description:
Abstract:
Draft - Interpolated grid of sediment size for the South Atlantic Bight Marine Assessment near shore (to 200 meter depth) area.  The interpolation was done using point data from U.S. Seabed and other sources (see Supplemental Information).
Purpose:
Provide a model of the sediment size throughout the South Atlantic Bight shallow (to 200 meter depth) sea floor.
Supplemental Information:
U.S. Seabed data points for the Atlantic and Gulf areas both Parsed and Extracted data types.
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.
Currentness Reference:
publication date
Status:
Progress: In work
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: 1223868.67389925
East Bounding Coordinate: 1941708.67389925
North Bounding Coordinate: 1756460.00422245
South Bounding Coordinate: 193790.004222455
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: Sediment
Theme Keyword: Phi
Place:
Place Keyword Thesaurus: None
Place Keyword: South Atlantic Bight
Place Keyword: South Atlantic
Place Keyword: Sea Floor
Access Constraints: Draft
Use Constraints:
The Nature Conservancy (TNC) compiled this data set from publicly available data sources and this data is freely distributable without permission from this TNC office. This data set must be cited on all electronic and hard copy products using the language of the Data Set Credit. The Nature Conservancy shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any sale, distribution, loan, or offering for use of these digital data, in whole or in part, is prohibited without the approval of the Nature Conservancy. The use of these data to produce other GIS products and services with the intent to sell for a profit is prohibited without the written consent of the Nature Conservancy. All parties receiving these data must be informed of these restrictions. The Nature Conservancy shall be acknowledged as data contributors to any reports or other products derived from these data.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Eastern Division Conservation Science office of The Nature Conservancy
Contact Person: John Prince
Contact Voice Telephone: 919.794.6545
Contact Electronic Mail Address: jprince@tnc.org
Data Set Credit:
The Nature Conservancy reserves all rights in data provided. All data are provided as is. This is not a survey quality dataset. The Nature Conservancy makes no warranty as to the currency, completeness, accuracy or utility of any specific data. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data.
Native Data Set Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143
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Data Quality Information:
Attribute Accuracy:
Quantitative Attribute Accuracy Assessment:
Attribute Accuracy Value: millimeters
Attribute Accuracy Explanation:
Sediment grain size is in millimeters
Lineage:
Source Information:
Source Citation Abbreviation:
usSeabed
Source Contribution:
U.S. Seabed Coastal & Marine Geology Program

Originator: U.S. Geological Survey 
Originator: University of Colorado 
Publication Date: 2005 
Title: 
ATL_EXT: usSEABED EXTracted data for the entire U.S. Atlantic Coast 
Edition: 1.0 
Geospatial Data Presentation Form: vector digital data 
Online Linkage: http://pubs.usgs.gov/ds/2005/118/data/atl_ext.zip 
Online Linkage: http://pubs.usgs.gov/ds/2005/118/htmldocs/data_cata.htm 
Larger Work Citation: 
Citation Information: 
Originator: J.M. Reid 
Originator: J.A. Reid 
Originator: C.J. Jenkins 
Originator: M.E. Hastings 
Originator: S.J. Williams 
Originator: L.J. Poppe 
Publication Date: 2005 
Title: 
usSEABED: Atlantic Coast Offshore Surficial Sediment Data Release 
Series Information: 
Series Name: Data Series 
Issue Identification: 118 
Publication Information: 
Publication Place: Woods Hole Science Center, Woods Hole, MA 
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program 
Online Linkage: http://pubs.usgs.gov/ds/2005/118/ 

Originator: U.S. Geological Survey 
Originator: University of Colorado 
Publication Date: 2005 
Title: 
ATL_PRS: usSEABED PaRSed data for the entire U.S. Atlantic Coast 
Edition: 1.0 
Geospatial Data Presentation Form: vector digital data 
Online Linkage: http://pubs.usgs.gov/ds/2005/118/data/atl_prs.zip 
Online Linkage: http://pubs.usgs.gov/ds/2005/118/htmldocs/data_cata.htm 
Larger Work Citation: 
Citation Information: 
Originator: J.M. Reid 
Originator: J.A. Reid 
Originator: C.J. Jenkins 
Originator: M.E. Hastings 
Originator: S.J. Williams 
Originator: L.J. Poppe 
Publication Date: 2005 
Title: 
usSEABED: Atlantic Coast Offshore Surficial Sediment Data Release 
Edition: 1.0 
Series Information: 
Series Name: Data Series 
Issue Identification: 118 
Publication Information: 
Publication Place: Woods Hole Science Center, Woods Hole, MA 
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program 
Online Linkage: http://pubs.usgs.gov/ds/2005/118/ 

Citation Information: 
Title: usSEABED EXTracted data for the Gulf of Mexico and Caribbean
gmx_ext 
Online Linkage: file: http://pubs.usgs.gov/ds/2006/146/


Citation Information: 
Title: usSEABED EXTracted data for the Gulf of Mexico and Caribbean
gmx_prs 
Online Linkage: file: http://pubs.usgs.gov/ds/2006/146/
Source Information:
Source Citation Abbreviation:
FL FWC
Source Contribution:
Florida
Title: Florida Fish and Wildlife Conservation Commission (FWC) Fish and Wildlife Research Institute‘s (FWRI) Fisheries-Independent Monitoring (FIM) program data. 2009
Source Information:
Source Citation Abbreviation:
NC Carteret County
Source Contribution:
Title: Carteret Sand Search Cores - 2011
Online Linkage: file: http://maps2.roktech.net/carteret_gomaps/index.html#
Source Information:
Source Citation Abbreviation:
SC DNR
Source Contribution:
Originator: South Carolina Department of Natural Resources 
Publication Date: October 2011 
Title: 
OceanSedimentPtData 
Geospatial Data Presentation Form: vector digital data 
Online Linkage: \\Mrdnas\shellmap\Work\Wind\FileDB\GISData\Habitat.gdb
Process Step:
Process Description:
usSeabed
Add "Source" field to document the origin of each record.
Extracted points within 10 Kilometers of the South Atlantic Bight Marine Assessment area from the Atlantic Extracted and Parsed and the Gulf & Caribbean Extracted and Parsed records.
Combine all four datasets into one ShapeFile (Atlantic Extracted, Atlantic Parsed, Gulf & Caribbean Extracted, Gulf & Caribbean Parsed).
Removed hard bottom records (ShepherfCode = Solid and records with no grain size (grainsize = -99).
Created a LatLong field and populate it with the concatinated values of the Latitude and Longitude values for each point location record.  Summarize on the LatLong field to identify locations that were represented by multiple records.  That identified 6,188 records that had from two up to 49 records representing one location.  For each location that had multiple records, the following rules were used to consistently identify a point from the duplicate records to represent each of the locations, all of the multiple points records for a location were examined to tag the appropriate point to keep in the interpolation set along with the other already unique points.  The rules:
I.	FIRST priority given to Extracted data  - and if there are multiple Extracted points then a record with the most identical grain size values (mode) is tagged
II.	If there is no mode in the extracted value records then the lowest Extracted grain size value is tagged
III.	If there are no Extracted data points for a location then the same selection process is used with the Parsed data; mode of grain size values is tagged
IV.	If no mode then the lowest Parsed grain size value is tagged
With the representative point tagged for all the locations that have multiple points I created a new ShapeFile of all the unique data points (Extracted & Parsed), 10,435 points in all.
Phi size was converted to millimeters for all records.
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person: John Prince
Contact Organization: Eastern Division Conservation Science office of The Nature Conservancy
Process Step:
Process Description:
Florida Fish and Wildlife Conservation Commission
Data was provided as an Excel spreadsheet which was added to ArcGIS as an Event Theme then saved to a ShapeFile
Remove records with Latitude and/or Longitude value of zero.
Add "Source" field to document the origin of each record.
Hard bottom records were removed as well as all other records where the BottomType attriute was other than S (sand) or M (mud).  The sand records were assigned a value of 0.239251 millimeters which is the average sand value of usSeabed sand points within 1 Kilometer of these points.  The mud records were assigned 0.0025 millimeters.  Mud, a mixture of clay and silt was given this value as the break point between the two classes in the wentworth scale.
Created a LatLong field and populate it with the concatinated values of the Latitude and Longitude values for each point location record.  Summarize on the LatLong field to identify locations that were represented by multiple records.  All locations with multiple records that had conflicting Bottom Type values (sand and mud) were removed and those that agreed were reduced to one record/location and used along with the other unique records for a unique location.  These locations were also checked against the usSeabed data to verify there were no duplicate points between the two sets.
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person: John Prince
Process Step:
Process Description:
Carteret Sand Search Cores - 2011
Data was provided as an Excel spreadsheet which was added to ArcGIS as an Event Theme then saved to a ShapeFile
Add "Source" field to document the origin of each record.
Visual inspection confirmed there were no duplicate points with the usSeabed data.
No sediment size field was in the attrbutes but a geology description field provided some indication of the nature of the bottom environment for most records.  Where there was no "geology" description that gave an indication of the nature of the seabed those records were removed.  The records with some descriptive information of the seabed were assigned a sediment size based on the average usSeabed value for that Shepardcode type of sediment (eg. sand or silt).
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person: John Prince
Process Step:
Process Description:
South Carolina Department of Natural Resources 
Add "Source" field to document the origin of each record.
Visual inspection confirmed there were no duplicate points with the usSeabed data.
Phi size was converted to millimeters for all records.
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person: John Prince
Process Step:
Process Description:
INTERPOLATION/KRIGING
Several Kriging test runs were made with different parameters.  
Inputs to the interpolation;
Number of points from each source included in the sediment interpolation: 30,409 Total.
usSEABED 10,435
Florida Fish and Wildlife Conservation Commission 15,994
Carteret Sand Search Cores  159
South Carolina Department of Natural Resources 3,821
Point ShapeFiles for the four sets; usSEABED, Florida Fish and Wildlife Conservation Commission, Carteret Sand Search Cores, and South Carolina Department of Natural Resources were merged into one set with 30,409 points.
In ArcGIS version 10.0 Spatial Analyst these points were interpolated using the Kriging method with the following parameters:
Kriging Method = Ordinary
Semivariogram model = Spherical
Output cell size = 90 (meters)
Search radius = variable
Number of points = 3
A mask of the shallow portion (to 200 meters depth) of the South Atlantic Bight Marine Assessment area was used in the processing.  An Output variance of prediction raster was produced.
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Spatial Data Organization Information:
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Grid Cell
Row Count: 17363
Column Count: 7976
Vertical Count: 1
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Spatial Reference Information:
Horizontal Coordinate System Definition:
Planar:
Planar Coordinate Information:
Planar Coordinate Encoding Method: row and column
Coordinate Representation:
Abscissa Resolution: 90.000000
Ordinate Resolution: 90.000000
Planar Distance Units: meters
Geodetic Model:
Horizontal Datum Name: D_North_American_1983
Ellipsoid Name: GRS_1980
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.257222
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Distribution Information:
Resource Description: Downloadable Data
Distribution Liability:
Neither The Nature Conservancy nor any of the ecoregional planning team participants makes any warranty, expressed or implied as to the use or appropriateness of use of the enclosed data, nor are there warranties of merchantability or fitness for a particular purpose or use.  No representation is made as to the currency, accuracy or completeness of the information in this dataset or of the data sources on which it is based.  Neither The Nature Conservancy nor any of the ecoregional planning team participants shall be liable for any lost profits or consequential damages, or claims against the user by third parties.
Standard Order Process:
Digital Form:
Digital Transfer Information:
Transfer Size: 535.675
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Metadata Reference Information:
Metadata Date: 20130328
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: The Nature Conservancy
Contact Person: John Prince
Contact Position: Conservation Information Manager
Contact Address:
Address Type: REQUIRED: The mailing and/or physical address for the organization or individual.
City: REQUIRED: The city of the address.
State or Province: REQUIRED: The state or province of the address.
Postal Code: REQUIRED: The ZIP or other postal code of the address.
Contact Voice Telephone: 919.794.6545
Contact Electronic Mail Address: jprince@tnc.org
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
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