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Connecticut Mainland Polygon
SDE Feature Class - depgis.DEP.CONNECTICUT_MAINLAND_POLY
FGDC, ESRI Metadata
DescriptionGraphicSpatialData StructureData QualityData SourceData DistributionMetadata
+ Resource Description
Citation
Information used to reference the data.
Title: Connecticut Mainland Polygon
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 20050101
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The USGS is the collector of the data (compiler). The State of Connecticut, Department of Environmental Protection is the creator and maintainer of the data layer (editor) and producer (publisher) of this information for use. This layer was first created and published in 20050101 based on information published in 19940101. This layer includes information that is relatively static and does not change over time. Data is not updated. Data compiled at 1:24,000 scale.
Description
A characterization of the data, including its intended use and limitations.
Abstract:
Connecticut Mainland Polygon includes the polygon features of a layer named Connecticut Mainland. Connecticut Mainland is a 1:24,000-scale, polygon and line feature-based layer that depicts the geographic area encompassed by and the boundary for the State of Connecticut with an additional linear shoreline feature separating the Connecticut mainland from the waters of Long Island Sound. The layer includes a polygon feature representing the Connecticut mainland, a polygon feature representing Connecticut waters in Long Island Sound and approximately 700 polygon features representing Connecticut islands in Long Island Sound. The layer is based on information from USGS topographic quadrangle maps published between 1969 and 1984 and latitude and longitude coordinates that define the boundary between the states of Connecticut and New York in Long Island Sound. Feature length and geographic area are encoded for linear and polygon features, respectively. This layer was originally published in 2005.
Purpose:
Connecticut Mainland is 1:24,000-scale base map data. For base map purposes, use this layer with other 1:24,000-scale base map data such as Town, Hydrography, Waterbody, Named Waterbody, Roads and Trails, Railroads, and Airports. All of these layers include information for Connecticut. Use Connecticut Mainland as a backgound layer to cartographically distinguish areas of water from land. Connecticut Mainland may be used as a possible data source for other 1:24,000-scale layers having features that should coincide with the Connecticut State boundary shown on USGS topographic quadrangle maps. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.)
Supplemental information:
In 2004, the State of Connecticut, Department of Environmental Protection developed automated procedures to maintaining feature topology and attribute integrity for the Town Master from USGS layer and layers derived from the Town Master from USGS layer such as Connecticut Mainland. Using ArcInfo Workstation 8.3 software and Arc Macro Language (AML) scripting environment, the automated procedures were recorded in an AML file named MAKECOVER.AML for the political boundary category of data published by the State of Connecticut, Department of Environmental Protection. The MAKECOVER.AML maintains the features and feature attribute data for the Town Master from USGS, Town Master, Town, Connecticut, and Connecticut Mainland layers. Unlike the other derived layers, the Connecticut Mainland layer was first derived in 2005. For additional information related to the original source of data from the U.S. Geological Survey, refer to the Data User Guides and Standards for 1:24,000-Scale Digital Line Graphs and Quadrangle Maps available from the U.S. Geological Survey, National Mapping Program.
Language of dataset: en
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Phone: 860-424-3540
Fax: 860-424-4058
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Data Type
How the data are represented, formatted and maintained by the data producing organization.
File or table name: depgis.DEP.CONNECTICUT_MAINLAND_POLY
Data type: vector digital data
Data format: SDE Feature Class
Native dataset environment: These data are maintained by the State of Connecticut using ArcGIS software developed by Environmental Systems Research Institute (ESRI) in a Microsoft Windows operating system environment.
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: None planned
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: DLG, large scale, political boundary, state
Keyword thesaurus: None
Theme:
Keywords: boundaries
Keyword thesaurus: ISO 19115 Topic Category
Place:
Keywords: Connecticut, CT
Keyword thesaurus: U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, DC, National Institute of Standards and Technology.
Place:
Keywords: United States of America, USA
Keyword thesaurus: U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
None. The data is in the public domain and may be redistributed.
Use constraints:
No restrictions or legal prerequisites for using the data. The data is suitable for use at appropriate scale, and is not intended for maps printed at scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet). Although this data set has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata. When printing this data on a map or using it in a software application, analysis, or report, please acknowledge the State of Connecticut, Department of Environmental Protection and the U.S. Geological Survey, National Mapping Program as the source for this information. For example, include the following data source description when printing this layer on a map: Political Boundaries - From the Connecticut Mainland layer, compiled and published by CT DEP and USGS. Source map scale is 1:24,000.
+ Graphic Example
Browse Graphic
Graphic illustration of the data.
Browse graphic 1
Open - Full view of Connecticut Mainland polygon and line features
Graphic Image
+ Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Projected coordinate system:
Name: NAD 1983 StatePlane Connecticut FIPS 0600 Feet
Map units: survey feet
Geographic coordinate system:
Name: GCS North American 1983
Coordinate System Details
Map projection
Map projection name: Lambert Conformal Conic
Standard parallel: 41.200000
Standard parallel: 41.866667
Longitude of central meridian: -72.750000
Latitude of projection origin: 40.833333
False easting: 999999.999996
False northing: 499999.999998
Planar Coordinate Information
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.000250
Ordinate resolution: 0.000250
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
Vertical Coordinate System
Reference system from which vertical distances (altitudes or depths) are measured.
Altitude system definition:
Altitude resolution: 1.000000
Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Projected or local coordinates
NAD 1983 StatePlane Connecticut FIPS 0600 Feet
BoundaryCoordinate
Left730512.188000 (survey feet)
Right1263094.375000 (survey feet)
Top944279.125000 (survey feet)
Bottom544018.813000 (survey feet)
In Unprojected coordinates (geographic)
GCS North American 1983
BoundaryCoordinate
West-73.742172 (longitude)
East-71.781365 (longitude)
North42.052612 (latitude)
South40.949970 (latitude)
+ Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Entity and attribute overview:
The Connecticut Mainland layer includes polygonal and linear features for the state of Connecticut boundary, the Connecticut shoreline and island features in Long Island Sound, as published on the U.S. Geological Survey 7.5 minute topographic quadrangle maps. Information encoded about features includes standard symbology classification schemes, feature area in acres and square miles, and feature length in miles. Use the AV_LEGEND attribute to symbolize polygon and line features by type on a map. Use the IMS_LEGEND attribute to more generally symbololize line features on a map.
Entity and attribute detailed citation:
For additional information related to the original source of data from the U.S. Geological Survey, refer to the Data User Guides and Standards for 1:24,000-Scale Digital Line Graphs and Quadrangle Maps available from the U.S. Geological Survey, National Mapping Program.
Direct spatial reference method: Vector
Indirect spatial reference method: State of Connecticut, United States of America
Attributes of Connecticut Mainland Polygon
Detailed descriptions of entity type, attributes, and attribute values for the data.
Name: depgis.DEP.CONNECTICUT_MAINLAND_POLY
Type of object: Feature Class
Geometry type: Polygon
Number of records: 603
Description:
Polygon features depict the geographic areas for the state of Connecticut, Connecticut islands in Long Island Sound and the waters of Long Island Sound in Connecticut along the coast.
Source:
State of Connecticut, Department of Environmental Protection and U.S. Geological Survey, National Mapping Program
Attributes
OBJECTID
Definition:
Internal feature number.
Alias: OBJECTID Type: OID Width: 4 Precision: 10 Scale: 0
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
SHAPE
Definition:
Feature geometry.
Alias: SHAPE Type: Geometry Width: 4 Precision: 0 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
TBPOLY_COD
Definition:
Town Boundary Polygon Code - Numeric values that identify town polygon area feature types. Differentiates town polygon features on land verses in open water, in Connecticut and out of state.
Alias: TBPOLY_COD Type: Double Width: 8 Precision: 16 Scale: 5Output width: 10
Attribute domain values
ValueDefinition
100
Connecticut Town. (The Connnecticut Mainland polygon feature is a merging and combination of all contiguous polygon features from the Connecticut Town with TBPOLY_COD attribute equal to 100)
Definition Source:
CT DEP
101
Connecticut Waters
Definition Source:
CT DEP
Attribute definition source:
State of Connecticut, Department of Environmental Protection
TOWN_POLY
Definition:
Town Boundary Polygon Type - Text values that correspond to numeric TBPOLY_COD attribute values. TOWN_POLY is the English language equivalent of (decodes) the TBPOLY_COD field.
Alias: TOWN_POLY Type: String Width: 20 Precision: 0 Scale: 0Output width: 20
Attribute values: See Enumerated Domain Value Definitions for TBPOLY_COD attribute.
Attribute definition source:
State of Connecticut, Department of Environmental Protection
AV_LEGEND
Definition:
ArcView Legend. A text field for symbolizing different feature types on a map.
Alias: AV_LEGEND Type: String Width: 30 Precision: 0 Scale: 0Output width: 30
Attribute domain values
ValueDefinition
Connecticut
Includes features with TBPOLY_COD attribute value 100.
Definition Source:
CT DEP
Water
Includes features with TBPOLY_COD attribute value 101.
Definition Source:
CT DEP
Attribute definition source:
State of Connecticut, Department of Environmental Protection
COASTP_COD
Definition:
Coastal Polygon Code. Identifies polygon features that are landward and seaward of a series of connecting hydrography line features that define a shoreline along the coast. These connecting hydrography line features that define the shoreline along the coast are referred to as Coastline Arcs and have a COASTA_COD value of 2. Coastline Arc features from the Hydrography layer have been incorporated into the Town Master layer to enclose town polygon features along the coast. Coastline Arcs define a cartographic boundary that separates inland (landward) features from coastal (seaward) features. This shoreline boundary does not represent a line of demarcation between tidal and non-tidal waters or between fresh, saline and brackish waters. Rather, these features define a standard shoreline boundary that is often incorporated into other layers compiled at 1:24,000 scale for consistency.
Alias: COASTP_COD Type: SmallInteger Width: 2 Precision: 5 Scale: 0Output width: 1
Attribute domain values
ValueDefinition
1
Inland Polygons - Polygon features that represent the mainland. These polygon features are inland (landward) line features that define the Coastline Arcs, which have a COASTA_COD value of 2.
Definition Source:
CT DEP
2
Coastal Island Polygons - Polygon features that represent islands along the Connecticut coastline. These polygon features are seaward of Coastline Arc line features, which have a COASTA_COD value of 2.
Definition Source:
CT DEP
3
Coastal Water Polygons - Polygon features that represent the coastal waters of Long Island Sound, Fishers Island Sound and Block Island Sound, including all bays, harbors and coves.  These polygon features are seaward of line features that define the Coastline Arcs, which have a COASTA_COD value of 2. 
Definition Source:
CT DEP
Attribute definition source:
State of Connecticut, Department of Environmental Protection
COAST_POLY
Definition:
Coastal Polygon - Text values that correspond to numeric COASTP_COD attribute values. COAST_POLY is the English language equivalent of (decodes) the COASTP_COD field.
Alias: COAST_POLY Type: String Width: 30 Precision: 0 Scale: 0Output width: 30
Attribute values: See Enumerated Domain Value Definitions for COASTP_COD attribute.
Attribute definition source:
State of Connecticut, Department of Environmental Protection
ACREAGE
Definition:
Calculated area of polygon feature in acres. Note, ACREAGE values are not automatically updated after modifying feature geometry (shape). Values must be recalculated after features are edited, simplified, generalized, clipped, dissolved, etc.
Alias: ACREAGE Type: Double Width: 8 Precision: 38 Scale: 8Output width: 12
Attribute values: Numeric value
Attribute definition source:
State of Connecticut, Department of Environmental Protection
AREA_SQMI
Definition:
Calculated area of polygon feature in square miles. Note, AREA_SQMI values are not automatically updated after modifying feature geometry (shape). Values must be recalculated after features are edited, simplified, generalized, clipped, dissolved, etc.
Alias: AREA_SQMI Type: Double Width: 8 Precision: 38 Scale: 8Output width: 12
Attribute values: Numeric value
Attribute definition source:
State of Connecticut, Department of Environmental Protection
SHAPE.area
Alias: SHAPE.area Type: Double Width: 0 Precision: 0 Scale: 0
SHAPE.len
Alias: SHAPE.len Type: Double Width: 0 Precision: 0 Scale: 0
ESRI Feature Description
Description of spatial objects in the data using the Environmental Systems Research Institute (ESRI) terminology.
Environmental Systems Research Institute (ESRI) terms
depgis.DEP.CONNECTICUT_MAINLAND_POLY
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 603
Spatial index: TRUE
Linear referencing: FALSE
SDTS Feature Description
Description of point and vector spatial objects in the data using the Spatial Data Transfer Standards (SDTS) terminology.
Spatial data transfer standard (SDTS) terms
depgis.DEP.CONNECTICUT_MAINLAND_POLY
Type: G-polygon
Count: 603
+ Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
Polygon features conform to the following topological rules. Polygons are single part. There are no duplicate polygons. Polygons do not self overlap. Polygons do not overlap other polygons. Polygons are bound by lines. Line features conform to the following topological rules. Lines are single part. There are no duplicate lines. Lines do not self overlap. Lines do not overlap other lines. Lines intersect only at nodes, and nodes anchor the ends of all lines. Lines do not overshoot or undershoot other lines they are supposed to meet and intersect. The tests of logical consistency were performed by the State of Connecticut using ESRI ArcInfo software to maintain feature topology in ArcInfo coverage format. The data is topologically clean. The ArcInfo Clean function was repeatedly used following edits to verify topology and enforce a minimum distance between vertices of 4 feet (fuzzy tolerance) and a minimum allowed overshoot length of 10 feet (dangle length).
Completeness report:
The completeness of the data reflects the USGS National Mapping Division standards for feature content of the data sources, which are the Large Scale (7.5 minute) Digital Line Graph (DLG) files available from the USGS. For Connecticut, the Large Scale DLG files used to create this layer are for the 1:24,000-scale topographic quadrangle maps published between 1969 and 1984.  The data is complete in the sense that it accurately reflects the contents of the most recently published USGS topographic quadrangle maps available at the time the State of Connecticut, Department of Environmental Protection began creating the layer. More recent quadrangle maps have been published by the USGS since 1984; however, the State of Connecticut did not incorporate this information into the layer. This data is not updated.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
This data retains the political boundary (linear) feature types identified by the USGS and adds new polygon feature types of importance to the State of Connecticut for the purpose of mapping areas of the State of Connecticut on land and in the waters of Long Island Sound. All attributes have valid values. Values are within defined domains. The accuracy test for the TBARC_COD and TBPOLY_COD attribute values was conducted by comparing the political boundaries published on the source topographic quadrangle maps with 1:24,000-scale check plots or interactive displays of the data on a computer graphic system. These checkplots and computer displays depicted the features in different colors based on their respective TBARC_COD and TBPOLY_COD values for comparison with the paper quadrangle maps. The TOWN_ARC, TOWN_POLY, AV_LEGEND, and IMS_LEGEND attribute values are based on TBARC_COD and TBPOLY_COD values. TOWN_POLY is the English language equivalent of (decodes) the TBPOLY_COD field for polygon features. TOWN_ARC is the English language equivalent of (decodes) the TBARC_COD field for line features. AV_LEGEND is a broad classification of TBPOLY_COD and TBARC_COD values for polygon and line features, respectively. Based on the TBPOLY_COD and TBARC_COD attribute values, the TOWN_POLY, TOWN_ARC, and AV_LEGEND fields were populated through table joins to lookup tables. These decode values were not manually entered. The COASTA_COD line attributes for the shoreline features were transferred with the Coastal Arc (coastline) features copied from the Hydrography Master layer. All other polygon and line features were manually selected and assigned COASTP_COD and COASTA_COD values based on their relative landward and seaward orientation to Coastline Arcs. The COAST_POLY and COAST_ARC attributes decode the COASTP_COD and COASTA_COD attribute values and were populated through table joins to lookup tables. The COAST_POLY field decodes the COASTP_COD field for polygon features. The COAST_ARC field decodes the COASTA_COD field line features. The ACREAGE (area in acres) and AREA_SQMI (area in square miles) fields were automatically calculated for each polygon feature based on computer generated feature area in square feet. The LENGTH_MI (length in miles) field was automatically calculated for each line feature base on computer generated feature length.
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
This data complies with United States National Map Accuracy Standards for 1:24,000 scale maps. According to this standard, not more than 10 percent of the points tested are to be in error by more than 1/50 inch (40 feet) measured on the publication scale of a USGS 7.5 minute topographic quadrangle map.
+ Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
Source 1 - Town Master from USGS
Title: Connecticut Town Master from USGS layer
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Town Master from USGS is a 1:24,000-scale, polygon and line feature-based layer that includes all political boundary features depicted on all of the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps that cover the State of Connecticut. Line features include State, county, town (municipal), and borough boundaries. Polygon features depict the geographic areas for individual towns (municipalities) and cities and boroughs within individual towns. This layer is the primary data source for a set of political boundary layers published by the State of Connecticut, Department of Environmental Protection. The Town Master, Town, Connecticut, and Connecticut Mainland layers are all ultimately derived from the polygon and line features of the Town Master from USGS layer. Note, the town boundary between Middletown and Portand was corrected and changed from its location, as depicted on the USGS topographic quadrangle maps, from along the banks of the Connecticut River in Portand to the middle of the Connecticut River south of Wilcox Island to the Pecausett Meadows area in Portland. Additionally, coastline and island feature information from the Hydrography Master layer was incorporated into the Town Master from USGS layer in order to enclose the land areas encompassed by towns adjacent to Long Island Sound and to define the islands that are part of these coastal towns. Features derived from the Hydrography Master layer are attributed with specific COASTA_COD and COASTP_COD values. Town Master from USGS is in ArcInfo Coverage format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Source 2 - Connecticut Mainland
Title: Connecticut Mainland
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Connecticut Mainland is in ArcInfo Coverage format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Source 3 - ConnecticutMainland_Poly.shp
Title: Connecticut Mainland Polygon
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
A polygon feature-based layer that depicts the geographic area encompassed by and the boundary for the State of Connecticut. It is comprised of polygon features representing the Connecticut mainland, Long Island Sound, and Connecticut islands in Long Island Sound. This layer only includes information for Connecticut. ConnecticutMainland_Poly.shp is in Shapefile format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Source 4 - Connecticut_Mainland_Poly
Title: Connecticut Mainland Polygon
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
A polygon feature-based layer that depicts the geographic area encompassed by and the boundary for the State of Connecticut. It is comprised of polygon features representing the Connecticut mainland, Long Island Sound, and Connecticut islands in Long Island Sound. This layer only includes information for Connecticut. Connecticut_Mainland_Poly is in GeoDatabase Feature Class format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
Create Connecticut Mainland - The State of Connecticut, Department of Environmental Protection developed an automated procedure to maintain feature topology and attribute integrity for the Connecticut Mainland layer by creating (deriving) the layer from a layer named Town Master from USGS. This procedure is documented in an Arc Macro Language (AML) script named MAKECOVER.AML for the political boundary category of data for the State of Connecticut, Department of Environmental Protection. This procedure combined the geometry of certain features and ensured consistent attribute values by programmatically joining lookup data tables to decode numeric code fields. The MAKECOVER.AML creates the Connecticut Mainland layer by extracting and processing features from the Town Master from USGS layer. All polygon and line features from the Town Master from USGS layer that defined boundaries in Connecticut were extracted and output to a separate ArcInfo Coverage named CONNMAINLAND. Subsequently, the IMS_LEGEND, STATE_COD, FIPS_COD, TOWN_NO, TOWN, CNTY_COD, COUNTY, CONN_CITY, CONN_BORO polygon attributes and STATE_COD, STATE_FLG, FIPS_FLG, CONN_FLG, TOWN_FLG, CITY_FLG, BORO_FLG, TNO_LEFT, TOWN_LEFT, TNO_RIGHT, TOWN_RIGHT, CITY_LEFT, CITY_RIGHT and BOROUGH line attributes were removed and polygon features were dissolved, merging all adjacent town area polygon features into a single polygon feature representing the Connecticut mainland. The MAKECOVER.AML was executed in 2005 in order to derive the Connecticut Mainland layer from the 2005 Edition of the Town Master from USGS layer. The name of the resulting ArcInfo coverage created by this automated process is CONNMAINLAND.

Note, all information is based on boundary lines depicted on USGS topographic quadrangle maps with the exception of most of the state boundary in Long Island Sound. The boundary line between the states of Connecticut and New York is described in Special Laws of Connecticut, Volume 16, pages 1104-1108, Senate Bill #322, An Act Establishing The Boundary Line Between Connecticut and New York. This Special Act documents the latitude and longitude coordinates of the state boundary monuments on the ground and points in the waters of Long Island Sound. These geodetic positions are based on Clark's spheroid of 1866 and are in degrees, minutes and seconds (DMS). The following boundary points enumerated in this act were used to define the state boundary in Long Island Sound.

Point No. 170: Latitude 40 57 03.228, Longitude -73 36 46.418
Point No. 171: Latitude 41 15 31.321, Longitude -72 05 24.685
Point No. 172: Latitude 41 17 26.341, Longitude -72 01 10.937
Point No. 173: Latitude 41 18 37.835, Longitude -71 55 47.626
Point No. 174: Latitude 41 18 16.249, Longitude -71 54 28.477
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Phone: 860-424-3540
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106
Country: USA
Process date: 2005
Process software and version: ArcInfo 8.3
Data Source used
Source 1 - Town Master from USGS
Title: Connecticut Town Master from USGS layer
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Town Master from USGS is a 1:24,000-scale, polygon and line feature-based layer that includes all political boundary features depicted on all of the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps that cover the State of Connecticut. Line features include State, county, town (municipal), and borough boundaries. Polygon features depict the geographic areas for individual towns (municipalities) and cities and boroughs within individual towns. This layer is the primary data source for a set of political boundary layers published by the State of Connecticut, Department of Environmental Protection. The Town Master, Town, Connecticut, and Connecticut Mainland layers are all ultimately derived from the polygon and line features of the Town Master from USGS layer. Note, the town boundary between Middletown and Portand was corrected and changed from its location, as depicted on the USGS topographic quadrangle maps, from along the banks of the Connecticut River in Portand to the middle of the Connecticut River south of Wilcox Island to the Pecausett Meadows area in Portland. Additionally, coastline and island feature information from the Hydrography Master layer was incorporated into the Town Master from USGS layer in order to enclose the land areas encompassed by towns adjacent to Long Island Sound and to define the islands that are part of these coastal towns. Features derived from the Hydrography Master layer are attributed with specific COASTA_COD and COASTP_COD values. Town Master from USGS is in ArcInfo Coverage format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 2 - Connecticut Mainland
Title: Connecticut Mainland
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Connecticut Mainland is in ArcInfo Coverage format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 2
Process description:
Export to Shapefile format - Converted polygon feature data from an ArcInfo coverage named CONNMAINLAND to a Shapefile named ConnecticutMainland_Poly.shp. Excluded the AREA, PERIMETER, CONNMAINLAND#, and CONNMAINLAND-ID attributes from the Shapefile because their values are only maintained by ArcInfo software with spatial data that is ArcInfo coverage format.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Phone: 860-424-3540
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106
Country: USA
Process date: 2005
Process software and version: ArcGIS 8.3
Data Source used
Source 2 - Connecticut Mainland
Title: Connecticut Mainland
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Connecticut Mainland is in ArcInfo Coverage format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 3 - ConnecticutMainland_Poly.shp
Title: Connecticut Mainland Polygon
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
A polygon feature-based layer that depicts the geographic area encompassed by and the boundary for the State of Connecticut. It is comprised of polygon features representing the Connecticut mainland, Long Island Sound, and Connecticut islands in Long Island Sound. This layer only includes information for Connecticut. ConnecticutMainland_Poly.shp is in Shapefile format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Process Step 3
Process description:
Convert to GeoDatabase Feature Class format - Defined new Feature Class named Connecticut_Mainland_Poly; and imported the attribute definitions, loaded features and imported metadata from ConnecticutMainland_Poly.shp shapefile. 

Spatial Reference Properties for Feature Class:

Coordinate System: NAD_1983_StatePlane_Connecticut_FIPS_0600_Feet
XY Domain MinX: 100000; MaxX: 2247483.645
XY Domain MinY: 200000; MaxY: 2347483.645
Precision: 1000
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Phone: 860-424-3540
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106
Country: USA
Process date: 2006
Process software and version: ArcGIS 9.1
Data Source used
Source 3 - ConnecticutMainland_Poly.shp
Title: Connecticut Mainland Polygon
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
A polygon feature-based layer that depicts the geographic area encompassed by and the boundary for the State of Connecticut. It is comprised of polygon features representing the Connecticut mainland, Long Island Sound, and Connecticut islands in Long Island Sound. This layer only includes information for Connecticut. ConnecticutMainland_Poly.shp is in Shapefile format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
Data Source produced
Source 4 - Connecticut_Mainland_Poly
Title: Connecticut Mainland Polygon
Originators: State of Connecticut, Department of Environmental Protection (data editor and publisher)
U.S. Geological Survey, National Mapping Program (data compiler)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 19940101
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
A polygon feature-based layer that depicts the geographic area encompassed by and the boundary for the State of Connecticut. It is comprised of polygon features representing the Connecticut mainland, Long Island Sound, and Connecticut islands in Long Island Sound. This layer only includes information for Connecticut. Connecticut_Mainland_Poly is in GeoDatabase Feature Class format.
Beginning date: 1969
Ending date: 1984
Currentness reference:
Publication dates of the USGS 7.5 minute topographic quadrangle maps for the State of Connecticut through 1984.
ESRI geoprocessing history
Description of ESRI geoprocessing commands, settings, and tolerances applied to the data.
ESRI geoprocessing command information
1 Process
Date: 20061204 Time: 120434
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures F:\GeoData\Political\geodatabase\Political_Boundary.mdb\Connecticut_Mainland_Poly "Database Connections\depdbs11@dep.sde\depgis.DEP.Connecticut_Mainland_Poly" DEPVECTORSTATIC 10000 0 0
2 CopyFeatures_26
Date: 20081215 Time: 154831
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures "Database Connections\10.18.8.94.depgis@DEP.sde\depgis.DEP.CONNECTICUT_MAINLAND_POLY" "Database Connections\062174-svr.depgis@DEP.sde\depgis.DEP.CONNECTICUT_MAINLAND_POLY" DEPFEATURESTATIC 0 0 0
+ Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description:
Connecticut Mainland Polygon
Distribution liability:
Although this data set  has been used by the State of Connecticut, Department of Environmental Protection, no warranty, expressed or implied, is made by the State of Connecticut, Department of Environmental Protection as to the accuracy of the data and or related materials.  The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the State of Connecticut, Department of Environmental Protection in the use of these data or related materials. The user assumes the entire risk related to the use of these data. Once the data is distributed to the user, modifications made to the data by the user should be noted in the metadata.
Technical prerequisites:
Geographic information sytem (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information.
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: State of Connecticut, Department of Enviromental Protection
Phone: 860-424-3540
Fax: 860-424-4058
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Standard Order Process
Common ways in which data may be obtained.
Digital form:
Format name: Shapefile, Feature Class, ArcInfo Coverage
Format version number: ArcGIS
File decompression technique: Zip file
Digital transfer option:
Online option:
Computer information:
Network address:
Network resource name: http://www.ct.gov/deep
Fees: An online copy of the data may be accessed without charge.
Custom Order Process
Description of custom distribution services available.
Custom order process:
The data distributor does not provide custom GIS analysis or mapping services. Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data.
+ Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20111207
Language of metadata: en
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Phone: 860-424-3540
Fax: 860-424-4058
Email: dep.gisdata@ct.gov
Hours of service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
Address type: mailing and physical address
Address:
79 Elm Street
City: Hartford
State or Province: Connecticut
Postal code: 06106-5127
Country: USA
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention: local time
Metadata profiles defining additonal information:
Profile: ESRI Metadata Profile
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.2
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
Instructions: On the top of the page, click on the title of the dataset to toggle opening and closing of all metadata content sections or click section links listed horizontally below the title to open individual sections. Click on a section name (e.g. Description) to open and close section content. Within a section, click on a item name (Status, Key Words, etc.) to open and close individual content items. By default, the Citation information within the Description section is always open for display.
Download: FGDC Plus Stylesheet is available from the ArcScripts downloads at www.esri.com.