Nearshore Ocean Management Planning Area Boundary (NOMPAB) - Commonwealth of Massachusetts

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: Massachusetts Office of Coastal Zone Management (CZM).

Publication_Date: 20060210

Title:

Nearshore Ocean Management Planning Area Boundary (NOMPAB) - Commonwealth of Massachusetts

Geospatial_Data_Presentation_Form: map

Description:

Abstract:

This data set contains the nearshore boundary line, in ESRI shape file format, for the Ocean Management Planning Area pursuant to "An Act Relative to Oceans" for the Commonwealth of Massachusetts. The Nearshore Ocean Management Planning Area Boundary (NOMPAB) line defines the landward limit of the Ocean Management Planning Area and represents the merger of a line projected 0.3 nautical miles (nm) from an approximate mean high water (MHW) shoreline data set and closing lines digitized manually to ensure that most developed coastal embayments, ports, harbors, etc. are located landward of the nearshore boundary. GIS files for this boundary are available for download. Since GIS projection and topology functions can alter or generalize coordinates, however, calculated coordinate values (also available for download) and not GIS files are the official record for the exact NOMPAB.

Purpose:

The Nearshore Ocean Management Planning Area Boundary (NOMPAB) was developed to establish a fixed boundary (i.e., not associated with an ambulatory natural feature) defining the nearshore limit of the Ocean Management Planning Area set forth in "An Act Relative to Oceans" for the Commonwealth of Massachusetts.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: unknown

Ending_Date: unknown

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -71.121096

East_Bounding_Coordinate: -69.892949

North_Bounding_Coordinate: 42.873819

South_Bounding_Coordinate: 41.232817

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Nearshore Ocean Management Planning Area Boundary

Theme_Keyword: NOMPAB

Theme_Keyword: ocean

Theme_Keyword: ocean management

Theme_Keyword: boundaries

Theme_Keyword: coastal zone management

Theme_Keyword: coastal zone

Theme_Keyword: shoreline

Theme_Keyword: Mean Low Water

Theme_Keyword: Mean High Water

Theme_Keyword: nearshore

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: boundaries, 003

Theme_Keyword: oceans, 014

Theme_Keyword: planningCadastre, 015

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Massachusetts

Place_Keyword: New England

Place_Keyword: United States of America

Place_Keyword: Gulf of Maine

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 2006

Access_Constraints:

None. The Boundary data are in the public domain. GIS files and geographic coordinate values are available for download.

Use_Constraints:

The data were developed within the public domain by CZM for the Executive Office of Environmental Affairs (EOEA), agencies of the Commonwealth of Massachusetts and no proprietary rights may be attached to them.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: CZM Data Manager

Contact_Address:

Address_Type: Mailing Address

Address: 251 Causeway Street, Suite 800, Boston, MA 02114-2136

City: Boston

State_or_Province: MA

Postal_Code: 02114-2136

Country: USA

Contact_Voice_Telephone: 617-626-1200

Contact_Facsimile_Telephone: 617-626-1240

Contact_Electronic_Mail_Address: czm@state.ma.us

Hours_of_Service: 0900 hrs to 1600 hrs EST

Contact_Instructions: email only

Data_Set_Credit:

This boundary was created by the Massachusetts Office of Coastal Zone Management for the Massachusetts Executive Office of Energy and Environmental Affairs (EOEA).

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.0.0.535

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Not Applicable

Logical_Consistency_Report:

A goal of the methodology used to produce a nearshore boundary line for the Ocean Management Planning Area was to ensure that marinas and a majority of moorings within waters of the Commonwealth lie landward of the proposed boundary. To satisfy this goal in an efficient manner, prior to boundary delineation, a working line was overlaid onto contemporary MASSGIS, 1:5,000 color orthophotos and contemporary large-scale NOAA Nautical charts for assessment. To further substantiate that the proposed boundary line location achieved this goal, a 1:180,000 plot of the line and the mosaiced orthophotos was reviewed by the Massachusetts Maritime Trades Association prior to final compilation. Geographic coordinates for the Nearshore Ocean Management Planning Area Boundary (NOMPAB) are calculated quantities and have been determined to be correct to 3 decimal places of a meter.

Completeness_Report:

To facilitate the boundary delineation process, a shoreline model was created using the NOAA mean high water line data set clipped to Massachusetts state boundaries and edited to remove all closed inland hydrologic high water lines (e.g., ponds, etc.) Similarly, outlier (e.g., buffer lines around small islands, rocks, etc.) buffer lines were deleted to create a working line. After applying a line simplification algorithm, portions of the simplified line were deleted and merged with manually digitized closing lines. The entire Nearshore Ocean Management Planning Area Boundary (NOMPAB) for the Commonwealth of Massachusetts is shown.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Coordinates for points forming the Nearshore Ocean Management Planning Area Boundary (NOMPAB) of the Ocean Management Planning Area have been calculated to 3 decimal places of a meter. Although at smaller production scales the final boundary appears to consist of straight lines and arcs, the legal boundary line shall be that boundary line generated by connecting sequentially the published coordinate values, on file with EOEA, with geodesic line segments.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Not Applicable

Lineage:

Process_Step:

Process_Description:

The Nearshore Ocean Management Planning Area Boundary (NOMPAB) was developed to create a fixed landward boundary (i.e., not associated with an ambulatory natural feature) for the Ocean Management Planning Area that could be defined and subsequently reproduced using geographic coordinates connected with geodesic lines. Generally, boundary development began with the development of a mean high water shoreline model from which a 0.3 nm buffer line was generated for use as a working boundary. This working boundary was simplified and subsequently modified manually with closing lines and a final boundary line, defined by geographic coordinates produced. Specifically, delineation of this boundary line was accomplished using the following methodology. 1. An approximate mean high water shoreline was downloaded to be used as the basis for the development of a working boundary line. This mean high water line was the merged vector shoreline created by NOAA's Office of Coast Survey and represents a topologically clean mean high water (MHW) line, derived and merged from NOAA charts, published at the best available scale, for the conterminous U.S., Hawaii, Alaska, and U.S. territories. The GIS files for this vector shoreline were downloaded from the Office of Coast Survey website, <http://nauticalcharts.noaa.gov/csdl/ctp/cm_vs.htm>, (accessed 1/12/06.) The line was subsequently clipped to the boundaries of Massachusetts and residual inland features were edited out manually. 2. The resulting MHW line was buffered seaward a distance of 0.3 nm. [A distance of 0.3 nm (approximately 1,837 feet) from MHW was selected to ensure that the final nearshore boundary would in most cases lie seaward of the maximum extent of private ownership in Massachusetts tidelands areas (100 rods, or 1,650 feet, form MHW)]. 3. Discrete buffered lines associated with small offshore islands, rocks lying above the plane of reference, etc. were subsequently clipped to form a continuous line. 4. This working line was further simplified with the ARCGIS Simplify Tool using the BEND SIMPLIFY simplification algorithm, a simplification tolerance specifying a reference baseline length of 250 meters with topological error resolution specified. 5. The resulting working line was then overlaid onto MASSGIS, 1:5,000, medium resolution orthophotos (MASSGIS considers the images as the ?base map? for the Commonwealth and EOEA) and contemporary, large scale digital NOAA Nautical Charts for visual inspection. With the line overlaid, orthophotos and charts were inspected to ensure that the working boundary was seaward of developed coastal embayments, ports, harbors, etc. for the length of the Massachusetts Mainland and Islands coastline. 6. Where necessary, the working boundary line was manually adjusted and/or straightened through the use of hand digitized closing lines. (Closing lines represent straight line adjustments to the working line, to ensure, to the extent possible, that developed ports, marinas, etc. are located landward of the NOMPAB.) 7. In areas of closing lines, the working boundary line was clipped and working boundary and closing line shapefiles subsequently merged to produce a topologically clean nearshore boundary line. 9. The working boundary line was then intersected with lateral state boundary lines between Rhode Island and New Hampshire respectively. State boundaries between Massachusetts, Rhode Island, and New Hampshire were derived from the MassGIS datalayer entitled "Community Boundaries (Towns) without Coast " containing onshore and offshore boundaries for the 351 communities of Massachusetts and edited to include only the boundary lines associated with towns of interest. The northerly and southerly ends of the nearshore boundary line are intended to intersect with the state boundaries between New Hampshire and Rhode Island, respectively. These termini shall be adjusted, should it be necessary to reflect the results of any future surveys that more accurately establish the spatial position of these lateral state boundaries. 10. Geographic coordinate values for all vertices used to define the working line were then generated using a custom Arc script for final boundary line delineation. 11. Although at smaller production scales the Final Nearshore Boundary appears to consist of straight lines and arcs, the legal line shall be that boundary line generated by the geodesic lines connecting (beginning with point #1 and progressing sequentially) the published coordinate values on file with EOEA. Lines delineating the nearshore boundaries circumscribing the islands of Nantucket and Martha's Vineyard are discrete from that line defining the nearshore boundary of the Mainland and Cape Cod.

Process_Date: 20060208

Process_Step:

Process_Description:

The data were converted to the Massachusetts State Plane coordinate system (NAD83; Mass State Plane, Mainland Zone (Fipszone 2001)).

Process_Date: 20080710

Cloud_Cover: n/a

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

New Hampshire/Massachusetts state boundary to the Rhode Island/Massachusetts state boundary, including the islands of Martha's Vineyard and Nantucket.

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: 61

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: 2001

Lambert_Conformal_Conic:

Standard_Parallel: 41.716667

Standard_Parallel: 42.683333

Longitude_of_Central_Meridian: -71.500000

Latitude_of_Projection_Origin: 41.000000

False_Easting: 200000.000000

False_Northing: 750000.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000000

Ordinate_Resolution: 0.000000

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

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: nompab

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: Id

Overview_Description:

Entity_and_Attribute_Overview: Not Applicable

Entity_and_Attribute_Detail_Citation: Not Applicable

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: CZM Data Manager

Contact_Address:

Address_Type: Mailing Address

Address: 251 Causeway Street, Suite 800, Boston, MA 02114-2136

City: Boston

State_or_Province: MA

Postal_Code: 02114-2136

Country: USA

Contact_Voice_Telephone: 617-626-1200

Contact_Facsimile_Telephone: 617-626-1240

Contact_Electronic_Mail_Address: daniel.sampson@state.ma.us

Hours_of_Service: 0900 hrs to 1600 hrs EST

Contact_Instructions: email only

Resource_Description: Downloadable Data

Distribution_Liability:

GIS files are provided to facilitate display and use in a planning context. Since GIS projection and topology functions can change or generalize coordinates, these GIS files are not the official record for the exact Nearshore Ocean Management Planning Area Boundary (NOMPAB). The exact boundary is defined by the listing of geographic coordinates (North American Datum of 1983 (NAD83)), connected by geodesic lines. The user bears all responsibility for subsequent use in any further analyses or comparisons. No warranty expressed or implied is made regarding the accuracy or utility of the data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcGIS Shapefile (.shp)

Format_Version_Number: ArcGIS 9.0

Transfer_Size: 0.128

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://www.mass.gov/czm/czm.htm>

Fees:

GIS and coordinate files may be downloaded at no charge by following links on the Massachusetts Office of Coastal Zone Management website.

Metadata_Reference_Information:

Metadata_Date: 20060210

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: CZM Data Manager

Contact_Address:

Address_Type: Mailing Address

Address: 251 Causeway Street, Suite 800, Boston, MA 02114-2136

City: Boston

State_or_Province: MA

Postal_Code: 02114-2136

Country: USA

Contact_Voice_Telephone: 617-626-1200

Contact_Facsimile_Telephone: 617-626-1240

Contact_Electronic_Mail_Address: daniel.sampson@state.ma.us

Hours_of_Service: 0900 hrs to 1600 hrs EST

Contact_Instructions: email only

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