Connecticut Airports Master

+ Resource Description

Citation

Information used to reference the data.

Title: Connecticut Airports Master

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

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. The 2005 Edition essentially includes the same set of geographic features published in 1994. However, the 2005 Edition differs from information published in 1994 primarily as a result of corrections and improvements to feature geometry and feature attribute information. Previously undetected errors have been corrected. Also, some feature attribute information (data fields) have been slightly modified and made easier to use. Except for periodic corrections, this layer includes information that is relatively static and does not change over time. Data compiled at 1:24,000 scale.

Description

A characterization of the data, including its intended use and limitations.

Abstract: Connecticut Airports Master is a 1:24,000-scale, feature-based layer that includes all airport features depicted on all of the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps that cover the State of Connecticut. The layer is based on information from USGS topographic quadrangle maps published between 1969 and 1984 and does not represent airports in Connecticut at any one particular point in time. The layer does not depict current conditions and excludes airports that have been built, modified, or removed since the time these topographic quadrangle maps were published. The layer delineates airports, heliports and seaplane landing areas. It does not include airport name, airport code, airport elevation, flight schedule, runway capacity, or ownership information. Features are linear and generally depict landing strips and perimeters for large and small airports. Attribute information is comprised of codes to cartographically represent (symbolize) these features on a map. This layer was originally published in 1994. The 2005 edition includes the same airport features published in 1994, but the attribute information has been slightly modified and made easier to use.

Purpose: Connecticut Airports Master is 1:24,000-scale base map data. It depicts the location of all airports published on the USGS topographic quadrangle maps. For base map purposes, use this layer with other 1:24,000-scale base map data such as Hydrography Master, Roads and Trails Master, Railroads Master, and Towns Master. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.). This layer is largely cartographic in nature since it does not include specific information about individual airports.

Supplemental information: In 2004, the State of Connecticut Department of Environmental Protection developed automated procedures to systematically maintain feature topology and attribute integrity for a set of related transportation data produced by the agency during the 1980's and 1980's from the 1:24,000-scale USGS DLGs. These layers include Roads and Trails Master, Roads and Trails, Railroads Master, Railroads, Buffered Roads Master, Buffered Roads, Airports Master, and Airports. Automated procedures were developed using ArcInfo Workstation 8.3 software and the Arc Macro Language (AML) as a scripting environment and recorded in an AML file named MAKECOVER.AML for the transportation category of data for the State of Connecticut, Department of Environmental Protection. 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.AIRPORT_MASTER

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: digital line graph, DLG, large scale, transportation, airport, heliport, seaplane, base map

Keyword thesaurus: None

Theme:

Keywords: transportation

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: Airports - From the Airports Master 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 Airports Master. These data include some nearby airports in Massachusetts, New York and Rhode Island published on the USGS 7.5 minute topographic maps that cover Connecticut.

Browse graphic 2

Open - Detail view of Connecticut Airports Master line features

+ 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

Boundary	Coordinate
Left	733137.625000 (survey feet)
Right	1270440.875000 (survey feet)
Top	964467.375000 (survey feet)
Bottom	578436.875000 (survey feet)

In Unprojected coordinates (geographic)

GCS North American 1983

Boundary	Coordinate
West	-73.733353 (longitude)
East	-71.753462 (longitude)
North	42.108009 (latitude)
South	41.044396 (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: Includes linear airport features such as includes airports, heliports and seaplane landing areas published on the U.S. Geological Survey 7.5 minute topographic quadrangle maps. Information encoded about features includes airport feature type classification and one standard symbology classification schemes.

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 Airports Master

Detailed descriptions of entity type, attributes, and attribute values for the data.

Name: depgis.DEP.AIRPORT_MASTER

Type of object: Feature Class

Geometry type: Polyline

Number of records: 458

Description: Airports, heliports and seaplane landing areas as line features

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

APARC_COD

Definition: Airport Arc Code. Numeric values that identify airport feature types.

Alias: APARC_COD Type: Double Width: 8 Precision: 16 Scale: 5Output width: 10

Attribute domain values

Value	Definition
403	Landing Strip, Airport, Perimeter of Airport
403	Definition Source: CT DEP, USGS
404	Heliport, Perimeter of Heliport
404	Definition Source: CT DEP, USGS
407	Seaplane Ramp or Landing Area
407	Definition Source: CT DEP, USGS

Attribute definition source: State of Connecticut, Department of Environmental Protection

APORTCLASS

Definition: Airport Class. Text values that correspond to the numeric APARC_COD attribute values. APORTCLASS is the English language equivalent of (decodes) the APARC_COD field

Alias: APORTCLASS Type: String Width: 50 Precision: 0 Scale: 0Output width: 50

Attribute values: See Enumerated Domain Value Definitions for APARC_COD attribute.

Attribute definition source: State of Connecticut, Department of Environmental Protection

AV_LEGEND

Definition: ArcView Legend. Text field for symbolizing airport feature types on a map.

Alias: AV_LEGEND Type: String Width: 20 Precision: 0 Scale: 0Output width: 20

Attribute domain values

Value	Definition
Airport	This category includes APARC_COD value 403.
Airport	Definition Source: CT DEP
Heliport	This category includes APARC_COD value 404.
Heliport	Definition Source: CT DEP
Seaplane	This category includes APARC_COD value 407.
Seaplane	Definition Source: CT DEP

Attribute definition source: State of Connecticut, Department of Environmental Protection

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.AIRPORT_MASTER

ESRI feature type: Simple

Geometry type: Polyline

Topology: FALSE

Feature count: 458

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.AIRPORT_MASTER

Type: String

Count: 458

+ 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: 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 USGS PROSYS program, and subsequently 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 layer 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. Some newer quadrangle maps have been published by the USGS since 1984, however, the State of Connecticut did not incorporate this information into the layer. So compared to the most recent set of topographic quadrangle maps available today, the layer is incomplete, and substantially incomplete when compared to airports in existence today. This data is not updated.

Attribute Accuracy

Accuracy of the identification of data entities, features and assignment of attribute values.

Attribute accuracy report: The layer retains the feature types identified by the USGS. All attributes have valid values. Values are within defined domains. The accuracy test for the APARC_COD attribute values was conducted by comparing the airports published on the source topographic quadrangle maps with 1:24,000-scale check plots or interactive displays of the airports data on a computer graphic system. These checkplots and computer displays depicted airport features in different colors based on their respective APARC_COD values for comparison with the paper quadrangle maps. The APORTCLASS and AV_LEGEND attribute values are based on APARC_COD values. APORTCLASS decodes the APARC_COD field. AV_LEGEND is a simple classification of APARC_COD values. The APORTCLASS and AV_LEGEND fields were populated though table joins to lookup tables. These values were not manually entered.

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 - DLG

Title: USGS Large Scale Digital Line Graph (DLG)

Originators: U.S. Geological Survey, National Mapping Program (data compiler and publisher)

Publisher: U.S Geological Survey

Publication place: Reston, Virginia, USA

Publication date: 1969-1984

Data type: file

Map scale denominator: 24000

Media: digital tape media

Source contribution: USGS Large Scale Digital Line Graph (DLG) data are digital representations of the cartographic (base map) information published on the 1:24,000-scale, 7.5 minute topographic quadrangle maps. The USGS produces DLG data per 7.5 minute quadrangle. DLG data is organized into categories such as hydrography, boundaries, and transportation. At the time the State of Connecticut began developing the Airports layer in the late 1980's, Large Scale DLG files were available for 112 of the 115 topographic quadrangle maps necessary to cover Connecticut. Large Scale DLG files were not available for the West Springfield Mass-Conn, Springfield South Mass-Conn, and Hamden Mass-Conn quadrangle. It is important to note that the Large-Scale DLGs were produced in the 1980's at a time when the USGS was developing standards, conventions, and procedures to convert topographic quadrangle maps into digital spatial data. The Connecticut DLG files were produced by digitizing from stable-base mylars using a digitizing tablet to capture the digital data. The features were manually digitized and attributed. Today, there are other methods available for producing DLGs. For additional DLG documentation, 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.

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 - Quadrangle data

Title: Airport 7.5 minute quadrangle Coverages

Originators: State of Connecticut, Department of Environmental Protection (data editor)

U.S. Geological Survey, National Mapping Program (data compiler)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, USA

Publication date: Unpublished Material

Data type: vector digital data

Map scale denominator: 24000

Media: disc

Source contribution: Airport features for each quadrangle map.

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 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 4 - Airport_Master.shp

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport_Master.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 5 - Airport_Master

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport_Master 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: DLG to ArcInfo coverage format conversion - Using ESRI ArcInfo software, the State of Connecticut, Department of Enviromental Protection converted the Airports overlay from the Transporation category for each Large Scale DLG file to ArcInfo Coverage format, resulting in one ArcInfo Coverage of linear features for each quadrangle area. The Transportation category of data includes major transportation systems collected in three separate overlays labeled: (1) Roads and Trails, (2) Airports, and (3) Pipelines, Transmission Lines, and Miscellaneous Transportation Features. Only the Airport overlay was extracted from the Transportation Layer as a data source for this layer. Each Coverage was converted from UTM to Connecticut State Plane, North American Datum of 1927 (NAD27).

Organization: State of Connecticut, Department of Environmental Protection

Person: Deborah Dumin, Jonathan Scull

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: 1985-1987

Process software and version: ArcInfo 5

Data Source used

Source 1 - DLG

Title: USGS Large Scale Digital Line Graph (DLG)

Originators: U.S. Geological Survey, National Mapping Program (data compiler and publisher)

Publisher: U.S Geological Survey

Publication place: Reston, Virginia, USA

Publication date: 1969-1984

Data type: file

Map scale denominator: 24000

Media: digital tape media

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 - Quadrangle data

Title: Airport 7.5 minute quadrangle Coverages

Originators: State of Connecticut, Department of Environmental Protection (data editor)

U.S. Geological Survey, National Mapping Program (data compiler)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, USA

Publication date: Unpublished Material

Data type: vector digital data

Map scale denominator: 24000

Media: disc

Source contribution: Airport features for each quadrangle map.

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: Attribute value verification - The quality and accuracy of the digitizing and coding of the airport features was checked by comparing the transporation features in each ArcInfo Coverage with the airport features on the published USGS topographic quadrangle maps. Visual comparisons using 1:24,000 scale paper check plots combined with automated procedures to identify inconsistent attribute coding were the primary means of evaluating and correcting obvious errors with the original DLG data. Where necessary, corrections were made to DLG major and minor codes in the ArcInfo Coverages. The original DLG major and minor codes were modified to form the APARC_COD attribute in the final Airports layer.

Organization: State of Connecticut, Department of Environmental Protection

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: 1985-1988

Process software and version: ArcInfo 5, 6

Data Source used

Source 2 - Quadrangle data

Title: Airport 7.5 minute quadrangle Coverages

Originators: State of Connecticut, Department of Environmental Protection (data editor)

U.S. Geological Survey, National Mapping Program (data compiler)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, USA

Publication date: Unpublished Material

Data type: vector digital data

Map scale denominator: 24000

Media: disc

Source contribution: Airport features for each quadrangle map.

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 - Quadrangle data

Title: Airport 7.5 minute quadrangle Coverages

Originators: State of Connecticut, Department of Environmental Protection (data editor)

U.S. Geological Survey, National Mapping Program (data compiler)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, USA

Publication date: Unpublished Material

Data type: vector digital data

Map scale denominator: 24000

Media: disc

Source contribution: Airport features for each quadrangle map.

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: Quadrangle coverage edgematch - Using ESRI ArcInfo software, the individual 7.5 minute quadrangle coverages of Airports features were systematically edgematched. Features along the edges of adjacent quadrangle were moved to make their end-point coordinates identical through a process of checkerboard style edgematching. Features on every other quadrangle were adjusted. The ends of Airport features were snapped to align with the connecting stationary features on adjacent quadrangles if their end-points were generally within 20 feet. Only a few airports appear on more than one topographic quadrangle map so only a few quadrangles were edgematched. On occasion, there were no connecting features on adjacent quadrangles to match to so some features abruptly end at quadrangle boundaries. This is either due to deficiencies with the data source or variations in quadrangle publication dates. These deficiencies were not resolved because the intent was to represent the classification of these features on USGS topographic quadrangle maps.

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: 1989-1990

Process software and version: ArcInfo 5

Data Source used

Source 2 - Quadrangle data

Title: Airport 7.5 minute quadrangle Coverages

Originators: State of Connecticut, Department of Environmental Protection (data editor)

U.S. Geological Survey, National Mapping Program (data compiler)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, USA

Publication date: Unpublished Material

Data type: vector digital data

Map scale denominator: 24000

Media: disc

Source contribution: Airport features for each quadrangle map.

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 - Quadrangle data

Title: Airport 7.5 minute quadrangle Coverages

Originators: State of Connecticut, Department of Environmental Protection (data editor)

U.S. Geological Survey, National Mapping Program (data compiler)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, USA

Publication date: Unpublished Material

Data type: vector digital data

Map scale denominator: 24000

Media: disc

Source contribution: Airport features for each quadrangle map.

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 4

Process description: Statewide layer creation - Using ESRI ArcInfo sofware, all of individual 7.5 minute quadrangle coverages were appended to form a single, statewide Airports layer. Linear features were unsplit (merged) to eliminate unnecessary pseudo nodes between similar features from adjacent quadrangle areas. Final line feature topology was established with ArcInfo Fuzzy and Dangle tolerances verified at 4 and 10 feet, respectively. At this step in the process the Airports layer was fully attributed and ready for use. Not all data fields from the orginal DLG files were preserved by this step in the process. A new data field, AV_LEGEND, was added to more easily classify and cartographically represent features when displaying the information with software such as ArcView.

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: 1994

Process software and version: ArcInfo 6

Data Source used

Source 2 - Quadrangle data

Title: Airport 7.5 minute quadrangle Coverages

Originators: State of Connecticut, Department of Environmental Protection (data editor)

U.S. Geological Survey, National Mapping Program (data compiler)

Publisher: State of Connecticut, Department of Environmental Protection

Publication place: Hartford, Connecticut, USA

Publication date: Unpublished Material

Data type: vector digital data

Map scale denominator: 24000

Media: disc

Source contribution: Airport features for each quadrangle map.

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 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 5

Process description: Datum conversion - Using ESRI ArcInfo software, the Airports layer was converted from the Connecticut State Plane Coordinate System of 1927 (NAD27) to the Connecticut State Plane Coordinate System of 1983 (NAD83). The NADCON (North American Datum CONversion) data transformation was used.

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: 1999

Process software and version: ArcInfo 7

Data Source used

Source 3 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 6

Process description: Attribute enhancements - APORTCLASS and AV_LEGEND attributes were changed from storing abbreviated values in upper case (e.g. AIRPORT, HELIPORT, SEAPLANE) to full length values in both upper and lower case (e.g. Airport, Heliport, Seaplane). The following attributes from the original DLG files were removed from the data table due to poor data quality: PHOTRV_FLG and QUAD_NO. These attribute values were inconsistent, not verified and of limited value to the State of Connecticut. Using Arc Macro Language (AML), an automated process (MAKECOVER.AML) was developed to maintain consistent attribute values by programmatically joining lookup data tables to decode numeric code fields.

Organization: State of Connecticut, Department of Environmental Protection

Person: Elizabeth Doran, 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: 2001-2004

Process software and version: ArcInfo 7, 8

Data Source used

Source 3 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 7

Process description: Create 2005 Edition of Airport - The automated process (software program), MAKECOVER.AML, developed for the previous process step was executed in 2005 in order to create a 2005 edition (copy) of Airport that captures recent corrections and enhancements made to the layer. The MAKECOVER.AML program was last run in 2005, and the name of the resulting ArcInfo coverage created by this automated process is AIRPORTMASTER. Prior to 2005, the Railroads Master layer in ArcInfo Coverage format was named AIRPORT.

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 3 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 8

Process description: Export to Shapefile format - Converted line feature data from an ArcInfo coverage named AIRPORTMASTER to a Shapefile named Airport_Master.shp. Excluded the FNODE#, TNODE#, LPOLY#, RPOLY#, LENGTH, AIRPORTMASTER#, AIRPORTMASTER-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 Protections

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 3 - Airport

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport 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 4 - Airport_Master.shp

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport_Master.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 9

Process description: Convert to GeoDatabase Feature Class format - Defined new Feature Class named Airport_Master; and imported the attribute definitions, loaded features and imported metadata from Airport_Master.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 4 - Airport_Master.shp

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport_Master.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 5 - Airport_Master

Title: Connecticut Airports Master

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: Airport features for all Connecticut quadrangle maps combined in a single, statewide layer. Airport_Master 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: 123936

Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures

Command issued: CopyFeatures F:\GeoData\Transportation\geodatabase\Transportation_Master.mdb\Airport_Master "Database Connections\depdbs11@dep.sde\depgis.DEP.Airport_Master" DEPVECTORSTATIC 10000 0 0

2 CopyFeatures_13

Date: 20081215 Time: 154639

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.AIRPORT_MASTER" "Database Connections\062174-svr.depgis@DEP.sde\depgis.DEP.AIRPORT_MASTER" 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 Airports Master

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

Size of the data: 0.075

Transfer size: 0.075

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: 20111222

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

Online linkage: http://www.esri.com/metadata/esriprof80.html

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.