Connecticut USGS 7.5 Minute Quadrangle Index
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Connecticut USGS 7.5 Minute Quadrangle Index
SDE Feature Class - depgis.DEP.QUAD_INDEX
FGDC, ESRI Metadata
DescriptionGraphicSpatialData StructureData QualityData SourceData DistributionMetadata
+ Resource Description
Citation
Information used to reference the data.
Title: Connecticut USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1985
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. The 2005 Edition includes that same spatial data originally published in 1985. However, the 2005 Edition has undergone a NADCON conversion from NAD27 to NAD83 and includes metadata.
Description
A characterization of the data, including its intended use and limitations.
Abstract:
This is an index of the 1:24,000-scale U.S. Geological Survey (USGS) 7.5-minute topographic quadrangle maps that cover the State of Connecticut. The index includes a polygon feature for each 7.5-minute quadrangle area. All polygon feature boundaries correspond exactly with the quadrangle boundaries depicted on the 7.5-minute topographic quadrangle maps published by the USGS because both are based on the Connecticut State Plane Coordinate System, North American Datum of 1927 (NAD27). Each polygon feature defines the same geographic area shown on the corresponding 1:24,000-scale USGS 7.5-minute topographic quadrangle map. Note, polygon attribute information is comprised of codes to uniquely identify individual quadrangle areas. This is static information that is not subject to change.
Purpose:
Use this layer to define the geographic area encompassed by the currently available set of 7.5-minute quadrangle maps published by the USGS, which are based on the Connecticut State Plane Coordinate System, North American Datum of 1927 (NAD27). For example, this layer can be used to clip or spatially query for map features in other layers that are located on a particular USGS 7.5-minute topographic quadrangle map. The polygon boundaries for this layer were not manually digitized but rather mathematically generated by projecting the latitude and longitude coordinate values that define the corners of the 7.5 minute quadrangle maps to the Connecticut State Plane Coordinate System, NAD27. Subsequently, these NAD27-based polygon areas were converted to the Connecticut State Plane Coordinate System, North American Datum of 1983 (NAD83) for consistency with other spatial data in NAD83. This geographic conversion or transformation process is commonly referred to as the North American Datum Conversion (NADCON) from NAD27 to NAD83. NADCON is the Federal standard for NAD27 to NAD83 datum transformations and is a tool for transforming coordinate values between datums. It does not improve the accuracy of the data. Also, it is important to note that as of the year this metadata was written (2005), all quadrangle maps for Connecticut were based on (published in) Connecticut State Plane Coordinate System, NAD27. None have been republished by the USGS in Connecticut State Plane Coordinate System, NAD83. For a true NAD83-based index, refer to a layer named USGS 7.5 Minute Quadrangle Index (NAD83 Area), which was generated by mathematically projecting the 7.5-minute latitude and longitude quadrangle corner coordinates directly to the Connecticut State Plane Coordinate System, NAD83.
Supplemental information:
CT DEP Quadrangle Numbers - The Connecticut Department of Environmental Protection established the following quadrangle numbers to uniquely identify 7.5 minute topographic quadrangle areas - Bashbish Falls MA-CT-NY (1), Ashley Falls MA-CT (2), South Sandisfield MA-CT (3), Tolland Center MA-CT (4), West Granville MA-CT (5), Southwick MA-CT (6), West Springfield MA-CT (7), Springfield South MA-CT (8), Hampden MA-CT (9), Monson MA-CT (10), Wales MA-CT (11), Southbridge MA-CT (12), Webster MA-CT (13), Oxford MA-CT-RI (14), Millerton NY-CT (15), Sharon CT-NY (16), South Canaan CT (17), Norfolk CT (18), Winsted CT (19), New Hartford CT (20), Tariffville CT-MA (21), Windsor Locks CT (22), Broad Brook CT (23), Ellington CT (24), Stafford Springs CT (25), Westford CT (26), Eastford CT (27), Putnam CT (28), Thompson CT-RI (29), Amenia NY-CT (30), Ellsworth CT (31), Cornwall CT (32), West Torrington CT (33), Torrington CT (34), Collinsville CT (35), Avon CT (36), Hartford North CT (37), Manchester CT (38), Rockville CT (39), Coventry CT (40), Spring Hill CT (41), Hampton CT (42), Danielson CT (43), East Killingly CT-RI (44), Dover Plains NY-CT (45), Kent CT (46), New Preston CT (47), Litchfield CT (48), Thomaston CT (49), Bristol CT (50), New Britain CT (51), Hartford South CT (52), Glastonbury CT (53), Marlborough CT (54), Columbia CT (55), Willimantic CT (56), Scotland CT (57), Plainfield CT (58), Oneco CT-RI (59), Pawling NY-CT (60), New Milford CT (61), Roxbury CT (62), Woodbury CT (63), Waterbury CT (64), Southington CT (65), Meriden CT (66), Middletown CT (67), Middle Haddam CT (68), Moodus CT (69), Colchester CT (70), Fitchville CT (71), Norwich CT (72), Jewett City CT (73), Voluntown CT-RI (74), Brewster NY-CT (75), Danbury CT (76), Newtown CT (77), Southbury CT (78), Naugatuck CT (79), Mount Carmel CT (80), Wallingford CT (81), Durham CT (82), Haddam CT (83), Deep River CT (84), Hamburg CT (85), Montville CT (86), Uncasville CT (87), Old Mystic CT (88), Ashaway RI-CT (89), Peach Lake NY-CT (90), Bethel CT (91), Botsford CT (92), Long Hill CT (93), Ansonia CT (94), New Haven CT (95), Branford CT (96), Guilford CT (97), Clinton CT (98), Essex CT (99), Old Lyme CT (100), Niantic CT (101), New London CT-NY (102), Mystic CT-NY-RI (103), Watch Hill RI-CT (104), Mount Kisco NY-CT (105), Pound Ridge NY-CT (106), Norwalk North CT-NY (107), Westport CT (108), Bridgeport CT (109), Milford CT (110), Woodmont CT (111), Glenville CT-NY (112), Stamford CT (113), Norwalk South CT (114), Sherwood Point CT-NY (115), Mamaroneck NY-CT (116), Unpublished Quad (1213), Unpublished Quad (1214), Unpublished Quad (1215), Unpublished Quad (1216), Orient NY (1217), Plum Island NY (1218), Unpublished Quad (1310), Unpublished Quad (1311), Unpublished Quad (1312), Unpublished Quad (1313), Bayville NY (1407), and Lloyd Harbor NY (1408).

The USGS does not publish 7.5 minute topographic quadrangle maps for quad numbers 1213, 1214, 1215, 1216, 1310, 1311, 1312, and 1313. These quadrangles are either located in the middle of Long Island Sound (and are entirely coved by water) or include small land areas along the coast shown on the southern margins of the Branford CT (96), Guilford CT (97), Clinton CT (98) topographic quadrangle maps. The Branford, Guilford, and Clinton topographic maps include areas along the Connecticut shoreline slightly beyond their southern quadrangle boundary, which is defined as 41 degrees and 15 minutes of latitude. The additionally mapped areas on these 3 quadrangle maps include locations such as the Thimble Islands, Sachems Head, and Hammonnasset Point. These areas are actually located on unpublished quadrangles  located to the south of the Branford, Guilford, and Clinton quadrangles - numbers 1213, 1214, and 1215. Unpublished quadrangle 1214 also covers Faulkners Island, which is in Long Island Sound off Guilford, Connecticut.

The Orient NY (1217), Plum Island NY (1218), Bayville NY (1407), and Lloyd Harbor NY (1408) quadrangles include portions of Connecticut waters along the Connecticut-New York state boundary in Long Island Sound in addition to sections of Long Island, New York. These quadrangle maps do not contain any Connecticut landmass.
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.QUAD_INDEX
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.
Date: not applicable
Currentness reference:
publication date
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: 7.5 minute, quadrangle map, index, USGS
Keyword thesaurus: None
Theme:
Keywords: boundaries, location
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 as the source for this information. For example, include the following data source description when printing this layer on a map: Quadrangle Boundary - From the USGS 7.5 Minute Quadrangle Index layer, published by the CT DEP. Source map scale is 1:24,000.
+ Graphic Example
Browse Graphic
Graphic illustration of the data.
Browse graphic 1
Open - Full view of Connecticut USGS 7.5 Minute Quadrangle Index
Graphic Image

Browse graphic 2
Open - View of Connecticut USGS 7.5 Minute Quadrangle Index with the Spring Hill, Connecticut Quadrangle (quad 41)
Graphic Image

Browse graphic 3
Open - Detail view of Connecticut USGS 7.5 Minute Quadrangle Index boundaries registering with the corner of a USGS topographic quadrangle map which was published in NAD27
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
Left723555.938000 (survey feet)
Right1275115.125000 (survey feet)
Top972265.687000 (survey feet)
Bottom515841.656000 (survey feet)
In Unprojected coordinates (geographic)
GCS North American 1983
BoundaryCoordinate
West-73.768995 (longitude)
East-71.735903 (longitude)
North42.129407 (latitude)
South40.872423 (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:
Use the QUAD_NO attribute to uniquely identify features.
Direct spatial reference method: Vector
Indirect spatial reference method: State of Connecticut, United States of America
Attributes of Connecticut USGS 7.5 Minute Quadrangle Index
Detailed descriptions of entity type, attributes, and attribute values for the data.
Name: depgis.DEP.QUAD_INDEX
Type of object: Feature Class
Geometry type: Polygon
Number of records: 128
Description:
USGS 7.5 Minute Topographic Quadrangle areas represented as polygon features.
Source:
State of Connecticut, Department of Environmental Protection
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
QUAD_NO
Definition:
Quadrangle Number - An ID number designated by the State of Connecticut, Department of Environmental Protection, Natural Resources Center in the 1980's to uniquely identify individual quadrangle maps.
Alias: QUAD_NO Type: SmallInteger Width: 2 Precision: 5 Scale: 0Output width: 4
Attribute values: Numeric value. Quadrangle maps published by the USGS that cover the Connecticut mainland and coastal area are assigned numeric values ranging from 1-116. Other quadrangle areas that encompass the waters of Connecticut in Long Island Sound are assigned numeric values range from 1213 to 1218, 1310 to 1313, and 1407 to 1408.
Attribute definition source:
State of Connecticut, Department of Environmental Protection
QUADRANGLE
Definition:
Quadrangle Name - Name of the quadrangle map published by the USGS
Alias: QUADRANGLE Type: String Width: 17 Precision: 0 Scale: 0Output width: 17
Attribute values: Text value
Attribute definition source:
US Geological Survey
SHAPE
Definition:
Feature geometry.
Alias: Shape Type: Geometry Width: 4 Precision: 0 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
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.QUAD_INDEX
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 128
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.QUAD_INDEX
Type: G-polygon
Count: 128
+ 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. 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 0  (zero) feet (dangle length).
Completeness report:
The degree of completeness is based on the extent to which the data covers the geographic area of the State of Connecticut. The layer is complete because it includes quadrangle index polygon features for all of Connecticut, including areas defined by 7.5 minutes of latitude and longitude where the USGS published 1:24,000-scale topographic quadrangle maps and areas of 7.5 minutes of latitude and longitude entirely covered by water (in Long Island Sound) where the USGS did not publish 7.5 minute topographic quadrangle maps.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
The USGS 7.5 Minute Topographic Quadrangle Index layer depicts the quadrangle boundary feature type shown on the 7.5 minute USGS topographic quadrangle maps as polygon features with boundaries originally based on a NAD27 horizontal datum used by the USGS to publish the topographic quadrangle maps. All attributes have valid values. Values are within defined domains. The accuracy test for the QUAD_NO attribute values was conducted by manually entering and visually inspecting and verifying the values. The QUADRANGLE attribute is the English language equivalent of (decodes) the QUAD_NO field values and was populated by joining the feature attribute data table to a lookup data table with QUAD_NO used as the relate key field. This lookup data table contain records with information that account for the unique occurrences of QUAD_NO.
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
The horizontal positional accuracy of this data complies with the United States National Map Accuracy Standards for 1:24,000 scale maps. According to this standard, not more than 10 percent of the locations 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 - tics.txt
Title: Polygon corner tic coordinates
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Data type: tabular digital data
Map scale denominator: not applicable
Media: disc
Source contribution:
Coordinates defining corners of 7.5 minute quadangle maps used to generate Tic registration features (Tic ID, Longitude, Latitude). Example values for one row of quadrangles:
806,-73.75000,41.75000
807,-73.62500,41.75000
808,-73.50000,41.75000
809,-73.37500,41.75000
810,-73.25000,41.75000
811,-73.12500,41.75000
812,-73.00000,41.75000
813,-72.87500,41.75000
814,-72.75000,41.75000
815,-72.62500,41.75000
816,-72.50000,41.75000
817,-72.37500,41.75000
818,-72.25000,41.75000
819,-72.12500,41.75000
820,-72.00000,41.75000
821,-71.87500,41.75000
822,-71.75000,41.75000
823,-71.62500,41.75000
906,-73.75000,41.62500
907,-73.62500,41.62500
908,-73.50000,41.62500
909,-73.37500,41.62500
910,-73.25000,41.62500
911,-73.12500,41.62500
912,-73.00000,41.62500
913,-72.87500,41.62500
914,-72.75000,41.62500
915,-72.62500,41.62500
916,-72.50000,41.62500
917,-72.37500,41.62500
918,-72.25000,41.62500
919,-72.12500,41.62500
920,-72.00000,41.62500
921,-71.87500,41.62500
922,-71.75000,41.62500
923,-71.62500,41.62500
Date: 1985
Currentness reference:
publication date
Source 2 - Index
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Map scale denominator: 24000
Media: disc
Source contribution:
Index is in ArcInfo coverage format with polygon and tic features.
Date: 1985
Currentness reference:
publication date
Source 3 - Index27
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher)
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Edition: 2005
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Index 27 is in ArcInfo coverage format with polygon and tic features.
Date: 1985
Currentness reference:
publication date
Source 4 - Quad_Index.shp
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher)
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. The 2005 Edition includes that same spatial data originally published in 1985. However, the 2005 Edition has undergone a NADCON conversion from NAD27 to NAD83 and includes metadata.
Map scale denominator: 24000
Media: disc
Source contribution:
Quad_Index.shp is in ESRI Shapefile format with polygon features.
Date: 1985
Currentness reference:
publication date
Source 5 - Quad_Index
Title: Connecticut USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1985
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. The 2005 Edition includes that same spatial data originally published in 1985. However, the 2005 Edition has undergone a NADCON conversion from NAD27 to NAD83 and includes metadata.
Map scale denominator: 24000
Media: disc
Source contribution:
Quad Index is in GeoDatabase Feature Class format
Date: 1985
Currentness reference:
publication date
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 Quadrangle Index - The quadrangle index polygon and tic registration features were mathematically created using ArcInfo 4 software to generate boundary line and tic registration features from latitude and longitude values that define the corners of the USGS 7.5 minute topographic quadrangle map that cover the State of Connecticut. For example, an initial ArcInfo coverage was generated to store (preliminary quadrangle boundary) line features based on a fishnet-type grid orientation with an origin of -73.45,40.875 (SW corner of quad 116), an upper left coordinate of -73.75,42.25 (NW corner of quad 406), an upper right coordinate of -71.625,42.25 (NE corner of quad 422), and a cell size of 0.125,0.125 (7.5 minutes). These features represented lines of latitude and longitude spaced at 7.5-minute intervals. Tic features were also generated and added to this coverage base on coordinate values from Source 1 (tics.txt). Spatial data was initially represented in Geographic Coordinates (unprojected units of latitude and longitude). In preparation for projecting the data to the Connecticut State Plane Coordinate System, five evenly spaced vertices were programmatically added along all quadrangle boundaries. This would allow line features to properly curve at vertex locations as opposed to simply projecting a straight line between quadrangle corners. The USGS 7.5 minute topographic quadrangle map are published in the Connecticut State Plane Coordinate System of 1927 (NAD27) so the quadrangle boundaries shown on these maps are not depicted as straight lines. Five vertices were programmatically added to each quadrangle boundary line feature at an interval of 0.021 minutes (0.125 / 6 = 0.021). Note, five vertices require 6 segments. ArcInfo coverage Fuzzy and Dangle tolerance settings were set to 4 and 0 (zero) feet, respectively. Based on the line feature geometry, polygon features were built and added to the Quadrangle Index Coverage, followed by manually attributing each polygon feature with the corresponding quadrangle number and quadrangle name information. Using ArcInfo 4 software, the coverage was projected from Geographic Coordinates to the Connecticut State Plane Coordinate System, North American Datum of 1927 (NAD27) to match the datum used by the USGS to publish the 1:24,000-scale 7.5 minute topographic quadrangle map series. The name of the resulting ArcInfo Coverage is INDEX.
Organization: State of Connecticut, Department of Environmental Protection
Person: Jonathan Scull
Process date: 1985
Process software and version: ArcInfo 4
Data Source used
Source 1 - tics.txt
Title: Polygon corner tic coordinates
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Data type: tabular digital data
Map scale denominator: not applicable
Media: disc
Source contribution:
Coordinates defining corners of 7.5 minute quadangle maps used to generate Tic registration features (Tic ID, Longitude, Latitude). Example values for one row of quadrangles:
806,-73.75000,41.75000
807,-73.62500,41.75000
808,-73.50000,41.75000
809,-73.37500,41.75000
810,-73.25000,41.75000
811,-73.12500,41.75000
812,-73.00000,41.75000
813,-72.87500,41.75000
814,-72.75000,41.75000
815,-72.62500,41.75000
816,-72.50000,41.75000
817,-72.37500,41.75000
818,-72.25000,41.75000
819,-72.12500,41.75000
820,-72.00000,41.75000
821,-71.87500,41.75000
822,-71.75000,41.75000
823,-71.62500,41.75000
906,-73.75000,41.62500
907,-73.62500,41.62500
908,-73.50000,41.62500
909,-73.37500,41.62500
910,-73.25000,41.62500
911,-73.12500,41.62500
912,-73.00000,41.62500
913,-72.87500,41.62500
914,-72.75000,41.62500
915,-72.62500,41.62500
916,-72.50000,41.62500
917,-72.37500,41.62500
918,-72.25000,41.62500
919,-72.12500,41.62500
920,-72.00000,41.62500
921,-71.87500,41.62500
922,-71.75000,41.62500
923,-71.62500,41.62500
Date: 1985
Currentness reference:
publication date
Data Source produced
Source 2 - Index
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Map scale denominator: 24000
Media: disc
Source contribution:
Index is in ArcInfo coverage format with polygon and tic features.
Date: 1985
Currentness reference:
publication date
Process Step 2
Process description:
Datum conversion - Using ESRI ArcInfo software, the Hydrography Master layer was converted from the Connecticut State Plane Coordinate System of 1927 (NAD27) to the Connecticut State Plane Coordinate System of 1983 (NAD83). The North American Datum Conversion (NADCON) data transformation was used.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Process date: 1999
Process software and version: ArcInfo 7
Data Source used
Source 2 - Index
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Map scale denominator: 24000
Media: disc
Source contribution:
Index is in ArcInfo coverage format with polygon and tic features.
Date: 1985
Currentness reference:
publication date
Data Source produced
Source 3 - Index27
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher)
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Edition: 2005
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Index 27 is in ArcInfo coverage format with polygon and tic features.
Date: 1985
Currentness reference:
publication date
Process Step 3
Process description:
Export to Shapefile Format - Converted polygon feature data from ArcInfo Coverage named INDEX27 to a Shapefile named Quad_Index.shp. Excluded the AREA, PERIMETER, INDEX27#, and INDEX27-ID attributes from the Shapefile because their values are only maintained by ArcInfo software with data that is in ArcInfo Coverage format.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Process date: 2005
Process software and version: ArcGIS 9.1
Data Source used
Source 3 - Index27
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher)
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Edition: 2005
Data location: http://www.ct.gov/deep
Map scale denominator: 24000
Media: disc
Source contribution:
Index 27 is in ArcInfo coverage format with polygon and tic features.
Date: 1985
Currentness reference:
publication date
Data Source produced
Source 4 - Quad_Index.shp
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher)
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. The 2005 Edition includes that same spatial data originally published in 1985. However, the 2005 Edition has undergone a NADCON conversion from NAD27 to NAD83 and includes metadata.
Map scale denominator: 24000
Media: disc
Source contribution:
Quad_Index.shp is in ESRI Shapefile format with polygon features.
Date: 1985
Currentness reference:
publication date
Process Step 4
Process description:
Convert to GeoDatabase Feature Class format - Defined new Feature Class named Quad_Index; and imported the attribute definitions, loaded features and imported metadata from  Quad_Index.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 (data compiler, editor, publisher)
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: 20060101
Process software and version: ArcGIS 9.1
Data Source used
Source 4 - Quad_Index.shp
Title: USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher)
Publisher: State of Connecticut
Publication place: Hartford, Connecticut
Publication date: 1985
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. The 2005 Edition includes that same spatial data originally published in 1985. However, the 2005 Edition has undergone a NADCON conversion from NAD27 to NAD83 and includes metadata.
Map scale denominator: 24000
Media: disc
Source contribution:
Quad_Index.shp is in ESRI Shapefile format with polygon features.
Date: 1985
Currentness reference:
publication date
Data Source produced
Source 5 - Quad_Index
Title: Connecticut USGS 7.5 Minute Quadrangle Index
Originators: State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher)
Publisher: State of Connecticut, Department of Environmental Protection
Publication place: Hartford, Connecticut, USA
Publication date: 1985
Edition: 2005
Data type: vector digital data
Data location: http://www.ct.gov/deep
Other citation details:
The State of Connecticut, Department of Environmental Protection is the collector of the data (compiler), the creator and maintainer of the data layer (editor), and producer (publisher) of this information for use. The 2005 Edition includes that same spatial data originally published in 1985. However, the 2005 Edition has undergone a NADCON conversion from NAD27 to NAD83 and includes metadata.
Map scale denominator: 24000
Media: disc
Source contribution:
Quad Index is in GeoDatabase Feature Class format
Date: 1985
Currentness reference:
publication date
ESRI geoprocessing history
Description of ESRI geoprocessing commands, settings, and tolerances applied to the data.
ESRI geoprocessing command information
1 CopyFeatures_57
Date: 20081215 Time: 162027
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.QUAD_INDEX" "Database Connections\062174-svr.depgis@DEP.sde\depgis.DEP.QUAD_INDEX" 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 USGS 7.5 Minute Quadrangle Index
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
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: 20111208
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.