Bathymetric Elevation Contours Offshore of New Jersey (Ten-Foot Interval)

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
New Jersey Department of Environmental Protection, (NJDEP) New Jersey Geological Survey, (NJGS)
Publication_Date: 20060301
Title:
Bathymetric Elevation Contours Offshore of New Jersey (Ten-Foot Interval)
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Digital Geodata Series
Issue_Identification: DGS06-1
Publication_Information:
Publication_Place: Trenton, New Jersey
Publisher: New Jersey Department of Environmental Protection
Online_Linkage: <http://www.state.nj.us/dep/njgs/geodata/dgs06-1.htm>
Description:
Abstract:
This DGS consists of bathymetric elevation contour lines at ten foot intervals off the New Jersey shore including parts of Delaware Bay, New York Bay, Raritan Bay and Sandy Hook Bay.  The bathymetric-elevation contour lines range from -10 feet to -220 feet and extend 20 miles offshore. "Bathymetry" data represents the water depth relative to sea level. The shapefile was created from xyz ASCII grid data obtained from The National Ocean & Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC), Coastal Relief Model Development Program. The data originated from a vast compilation of hydrographic soundings collected by the National Ocean Service (NOS) and various academic institutions.        
Purpose:
The New Jersey Geological Survey created this shapefile to assess offshore resources such as sand for beach replenishment programs.
Supplemental_Information:
This data is not to be used for navigation. Although this data are of high quality and useful for planning and modeling purposes, they do not necessarily reflect current conditions, nor do they depict data which are on a nautical chart. For navigation please refer to the NOS nautical chart series.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20051205
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.327293
East_Bounding_Coordinate: -73.604722
North_Bounding_Coordinate: 40.585499
South_Bounding_Coordinate: 38.636410
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: bathymetry
Theme_Keyword: contours
Theme_Keyword: ocean
Theme_Keyword: elevation
Theme_Keyword: offshore
Theme_Keyword: topographic map
Theme_Keyword: relief
Theme_Keyword: coast
Theme_Keyword: interval
Theme_Keyword: line
Theme_Keyword: depth
Theme_Keyword: geology
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Place:
Place_Keyword_Thesaurus: USGS Place Names Gazetteer
Place_Keyword: State of New Jersey
Place_Keyword: New Jersey
Stratum:
Stratum_Keyword_Thesaurus: none
Stratum_Keyword: seafloor
Access_Constraints: None
Use_Constraints:
New Jersey Department of Environmental Protection (NJDEP) Data Distribution Agreement

I. Description of Data to be Provided.

The data provided herein are distributed subject to the following conditions and restrictions:

SUBJECT DATA LAYERS

For all data contained herein, NJDEP makes no representations of any kind, including, but not limited to, the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. NJDEP assumes no responsibility to maintain them in any manner or form.

II. Terms of Agreement

1. Digital data received from the NJDEP are to be used solely for internal purposes in the conduct of daily affairs.

2. The data are provided, as is, without warranty of any kind and the user is responsible for understanding the accuracy limitations of all digital data layers provided herein, as documented in the accompanying cross-reference files (see Section 1.14 CROSS-REFERENCE). Any reproduction or manipulation of the above data must ensure that the coordinate reference system remains intact.

3. Digital data received from the NJDEP may not be reproduced or redistributed for use by anyone without first obtaining written permission from the NJDEP. This clause is not intended to restrict distribution of printed mapped information produced from the digital data.

4. Any maps, publications, reports, or other documents produced as a result of this project that utilize NJDEP digital data will credit the NJDEP's Geographic Information System (GIS) as the source of the data with the following credit/disclaimer:

"This (map/publication/report) was developed using New Jersey Department of Environmental Protection Geographic Information System digital data, but this secondary product has not been verified by NJDEP and is not state-authorized."

5. Users shall require any independent contractor, hired to undertake work that will utilize digital data obtained from the NJDEP, to agree not to use, reproduce, or redistribute NJDEP GIS data for any purpose other than the specified contractual work.

All copies of NJDEP GIS data utilized by an independent contractor will be required to be returned to the original user at the close of such contractual work. Users hereby agree to abide by the use and reproduction conditions specified above and agree to hold any independent contractor to the same terms. By using data provided herein, the user acknowledges that terms and conditions have been read and that the user is bound by these criteria.

Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ted Pallis
Contact_Organization:
New Jersey Department of Environmental Protection, New Jersey Geological Survey
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: PO Box 427
Address: 29 Arctic Parkway
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625-0427
Country: US
Contact_Voice_Telephone: (609) 984-6587
Contact_Facsimile_Telephone: (609) 633-1004
Contact_Electronic_Mail_Address: ted.pallis@dep.nj.gov
Hours_of_Service: 9-5
Browse_Graphic:
Browse_Graphic_File_Name: <http://www.state.nj.us/dep/njgs/geodata/dgs06-1.htm#image>
Browse_Graphic_File_Description:
Web page with image of Bathymetric Elevation Contours Offshore of New Jersey (10 Foot Interval)
Browse_Graphic_File_Type: GIF
Security_Information:
Security_Classification_System: none
Security_Classification: Unclassified
Security_Handling_Description: none
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Attribute accuracy was tested by printing a map of the bathymetric elevation contour lines on mylar at a scale of 1:80,000 and overlaying the mylar on a NOS nautical chart with bathymetry at the scale of 1:80,000.
Logical_Consistency_Report:
The file is created as a line shapefile with attributes. These bathymetric elevation contours were edited by heads up (on-screen) digitizing in ArcGIS v. 9 to correct obvious errors.
Completeness_Report: There are no known omissions.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The shapefile accuracy reflects the accuracy of the data sources. The following excerpt was taken from the on-line NGDC Coastal Relief Model Development for the grid data:

The horizontal accuracy of the soundings is within a radius of 1.5 mm of the sounding location at the scale at which the soundings are recorded. NOS surveys are plotted at map scales that range from 1/10,000 for harbors and channels to 1/50,000 for open ocean surveys, with 1/20,000 being the most commonly used scale. The horizontal accuracy of the soundings is generally 30 m, but it can vary from as fine as 15 m in ports and estuaries to as coarse as 75 m in the offshore areas. Differential GPS has improved this level of accuracy considerably for the most recent survey data.

Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The shapefile accuracy reflects the accuracy of the data sources. The following excerpt was taken from the on-line NGDC Coastal Relief Model Development for the grid data:

The vertical accuracy of the soundings is 0.3 m in 0 - 20 m of water, 1.0 m in 20 - 100 m of water, and 1% of the water depth in 100 m of water.

Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: National Oceanic and Atmospheric Administration (NOAA)
Publication_Date: Unknown
Title: NGDC Coastal Relief Model Development
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: NOAA
Online_Linkage: <http://www.ngdc.noaa.gov/mgg/coastal/coastal.html>
Source_Scale_Denominator: 50000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: (NGDC) Coastal Relief Model Development
Source_Contribution:
(NOAA) National Geophysical Data Center (NGDC), Coastal Relief Model Development Program.
Process_Step:
Process_Description:
The New Jersey Geological Survey obtained the source data used to create this shapefile from the National Ocean & Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC), Coastal Relief Model Development Program as an xyz, ASCII grid data set by downloading it from the internet. The data selected for downloaded from the NOAA web site contained a table of ID, longitude, latitude and elevations in meters with an elevation less than zero for the New Jersey coastal area.

The xyz ASCII table was processed at NJGS by converting the longitude and latitude locations to easting, northing, NJ State Plane Feet NAD83 by using the New Jersey Geological Survey, Coordinate Conversion Utility program available at <http://www.state.nj.us/dep/njgs/geodata/dgs03-1.htm>. The NJGS Coordinate Conversion Utility accepts only ID, x and y fields. A subset table was created with ID, x and y fields for the conversion. After the conversion from longitude and latitude to easting and northing the table contained the fields ID, easting and northing. This subset table was then joined with the original xyz ASCII table by the ID field. A new field called elevation was added to this table to convert the elevations from meters to feet. The feet were derived by multiplying the water depth in meters by 3.28083, the number of feet in a meter to populate the elevation column with values in feet. The conversion from meters to feet was done to allow for volumetric calculations in cubic yards. The field containing the elevations in meters was removed.

The ASCII table with the columns ID, northing, easting and elevation was imported into Surfer (Version, 8.02 Golden Software, Inc., <http://www.goldensoftware.com>). These bathymetric elevations in feet from the ASCII table were gridded (Kriging) in Surfer with a 100 by 100 foot cell size (evenly spaced samples). Kriging in Surfer with 100 by 100 foot cell size provided the most accurate representation of the ocean depth in NJGS trials. After the gridding process was complete a contour map was created in Surfer from the grid. The contour interval was set at ten feet and the smoothing level was set on low. This contour data was exported as an Autocad DXF file.

The DXF file was imported into ArcGIS and saved as a shapefile. In ArcGIS, a twenty mile buffer was created from a shapefile of the New Jersey coastline. The bathymetric elevation contours off New Jersey shapefile was then clipped to this buffer file. Heads up editng was used to remove obvious errors. The erase command was used to remove any contours crossing over from the ocean into the inlets.

Process_Date: 20050726
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ted Pallis
Contact_Organization:
New Jersey Department of Environmental Protection, New Jersey Geological Survey
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: PO Box 427
Address: 29 Arctic Parkway
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625-0427
Country: US
Contact_Voice_Telephone: (609) 984-6587
Contact_Facsimile_Telephone: (609) 633-1004
Contact_Electronic_Mail_Address: ted.pallis@dep.nj.gov
Hours_of_Service: 9-5
Cloud_Cover: 0

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 4827

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 2900
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999900
Longitude_of_Central_Meridian: -74.500000
Latitude_of_Projection_Origin: 38.833333
False_Easting: 492125.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001024
Ordinate_Resolution: 0.001024
Planar_Distance_Units: survey feet
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

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: bathymetry.shp
Entity_Type_Definition:
Bathymetric elevation contours offshore of New Jersey (Ten Foot Interval).
Entity_Type_Definition_Source: NJGS
Attribute:
Attribute_Label: FID
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: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: FID_
Attribute_Definition: ESRI ID field
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: unique
Attribute:
Attribute_Label: Elevation
Attribute_Definition: elevation value
Attribute_Definition_Source: NJGS
Attribute_Domain_Values:
Unrepresentable_Domain: Unique sea floor elevation value in feet below sea level.
Overview_Description:
Entity_and_Attribute_Overview: The database contains bathymetric elevation contours in feet.
Entity_and_Attribute_Detail_Citation: See detailed description of attributes.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ted Pallis
Contact_Organization:
New Jersey Department of Environmental Protection, New Jersey Geological Survey
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: PO Box 427
Address: 29 Arctic Parkway
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625-0427
Country: US
Contact_Voice_Telephone: (609) 984-6587
Contact_Facsimile_Telephone: (609) 633-1004
Contact_Electronic_Mail_Address: ted.pallis@dep.nj.gov
Hours_of_Service: 9-5
Resource_Description: Downloadable data.
Distribution_Liability:
This organization provides the geographic data as is. This organization makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Also, this organization makes no warranty either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these files have been processed successfully on computers at this organization, no warranty is made by this organization regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: AVSHP
Format_Version_Number: 9x
File_Decompression_Technique: WinZip
Transfer_Size: 0.361
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://www.state.nj.us/dep/njgs/geodata/dgs06-1.htm>
Offline_Option:
Offline_Media: none
Recording_Format: none
Fees: none
Ordering_Instructions: Downloadable data
Custom_Order_Process:
Contact: State Geologist, New Jersey Geological Survey, PO BOX 427, 29 Arctic Parkway Trenton, NJ 08625-0420
Technical_Prerequisites: Software capable of viewing ESRI shapefiles.

Metadata_Reference_Information:
Metadata_Date: 20051216
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
New Jersey Department of Environmental Protection, New Jersey Geological Survey
Contact_Person: Ted Pallis
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing address
Address: 29 Arctic Parkway
City: Trenton
State_or_Province: New Jersey
Postal_Code: 08625-0427
Country: US
Contact_Voice_Telephone: (609) 984-6587
Contact_Facsimile_Telephone: (609) 633-1004
Contact_Electronic_Mail_Address: ted.pallis@dep.nj.gov
Hours_of_Service: 9-5
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: none
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: none
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Tue Feb 28 09:45:11 2006