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Connecticut USGS 7.5 Minute Quadrangle Index

Frequently-asked questions:


What does this data set describe?

Title:
Connecticut USGS 7.5 Minute Quadrangle Index

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.

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.

  1. How should this data set be cited?

    State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher), 1985, Connecticut USGS 7.5 Minute Quadrangle Index: State of Connecticut, Department of Environmental Protection, Hartford, Connecticut, USA.

    Online links:
    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.

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -73.768995
    East: -71.735903
    North: 42.129407
    South: 40.872423

  3. What does it look like?

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/quadindexfullview.gif (GIF)
    Full view of Connecticut USGS 7.5 Minute Quadrangle Index

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/quadindexquadview.gif (GIF)
    View of Connecticut USGS 7.5 Minute Quadrangle Index with the Spring Hill, Connecticut Quadrangle (quad 41)

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/quadindexdetailview.gif (GIF)
    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

  4. Does the data set describe conditions during a particular time period?

    Calendar date: not applicable
    Currentness reference:
    publication date

  5. What is the general form of this data set?

    Geospatial data presentation form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect spatial reference:
      State of Connecticut, United States of America

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (128)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      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 coordinates are encoded using coordinate pair.
      Abscissae (x-coordinates) are specified to the nearest 0.000250.
      Ordinates (y-coordinates) are specified to the nearest 0.000250.
      Planar coordinates are specified in survey feet.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

      Vertical coordinate system definition:
      Altitude system definition:
      Altitude resolution: 1.000000
      Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    Connecticut USGS 7.5 Minute Quadrangle Index
    USGS 7.5 Minute Topographic Quadrangle areas represented as polygon features. (Source: State of Connecticut, Department of Environmental Protection)

    OBJECTID
    Internal feature number. (Source: ESRI)
                      

    Sequential unique whole numbers that are automatically generated.

    QUAD_NO
    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. (Source: State of Connecticut, Department of Environmental Protection)
                      

    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.

    QUADRANGLE
    Quadrangle Name - Name of the quadrangle map published by the USGS (Source: US Geological Survey)
                      

    Text value

    SHAPE
    Feature geometry. (Source: ESRI)
                      

    Coordinates defining the features.

    SHAPE.area
    SHAPE.len
    Entity and attribute overview:
    Use the QUAD_NO attribute to uniquely identify features.
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Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)


  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Howie Sternberg
    State of Connecticut, Department of Environmental Protection
    79 Elm Street
    Hartford, Connecticut 06106-5127
    USA

    860-424-3540 (voice)
    860-424-4058 (FAX)
    dep.gisdata@ct.gov
    Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
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Why was the data set created?

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.

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How was the data set created?

  1. Where did the data come from?

    Source 1 - tics.txt (source 1 of 5)

    State of Connecticut, Department of Environmental Protection, 1985, Polygon corner tic coordinates: State of Connecticut, Hartford, Connecticut.

    Type of source media: disc
    Source scale denominator: not applicable
    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

    Source 2 - Index (source 2 of 5)

    State of Connecticut, Department of Environmental Protection, 1985, USGS 7.5 Minute Quadrangle Index: State of Connecticut, Hartford, Connecticut.

    Type of source media: disc
    Source scale denominator: 24000
    Source contribution:
    Index is in ArcInfo coverage format with polygon and tic features.

    Source 3 - Index27 (source 3 of 5)

    State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher), 1985, USGS 7.5 Minute Quadrangle Index: State of Connecticut, Hartford, Connecticut.

    Online links:
    Type of source media: disc
    Source scale denominator: 24000
    Source contribution:
    Index 27 is in ArcInfo coverage format with polygon and tic features.

    Source 4 - Quad_Index.shp (source 4 of 5)

    State of Connecticut, Department of Environmental Protection (data compiler, editor, and publisher), 1985, USGS 7.5 Minute Quadrangle Index: State of Connecticut, Hartford, Connecticut.

    Online links:
    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.

    Type of source media: disc
    Source scale denominator: 24000
    Source contribution:
    Quad_Index.shp is in ESRI Shapefile format with polygon features.

    Source 5 - Quad_Index (source 5 of 5)

    State of Connecticut, Department of Environmental Protection (data compiler, editor and publisher), 1985, Connecticut USGS 7.5 Minute Quadrangle Index: State of Connecticut, Department of Environmental Protection, Hartford, Connecticut, USA.

    Online links:
    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.

    Type of source media: disc
    Source scale denominator: 24000
    Source contribution:
    Quad Index is in GeoDatabase Feature Class format

  2. What changes have been made?

    Date: 1985 (change 1 of 4)
    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.

    Person responsible for change:
    Jonathan Scull
    State of Connecticut, Department of Environmental Protection

    Data sources used in this process:
    • Source 1 - tics.txt

    Data sources produced in this process:
    • Source 2 - Index

    Date: 1999 (change 2 of 4)
    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.
    

    Person responsible for change:
    Howie Sternberg
    State of Connecticut, Department of Environmental Protection

    Data sources used in this process:
    • Source 2 - Index

    Data sources produced in this process:
    • Source 3 - Index27

    Date: 2005 (change 3 of 4)
    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.

    Person responsible for change:
    Howie Sternberg
    State of Connecticut, Department of Environmental Protection

    Data sources used in this process:
    • Source 3 - Index27

    Data sources produced in this process:
    • Source 4 - Quad_Index.shp

    Date: 20060101 (change 4 of 4)
    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

    Person responsible for change:
    Howie Sternberg
    State of Connecticut, Department of Environmental Protection (data compiler, editor, publisher)
    79 Elm Street
    Hartford, Connecticut 06106
    USA

    860-424-3540 (voice)

    Data sources used in this process:
    • Source 4 - Quad_Index.shp

    Data sources produced in this process:
    • Source 5 - Quad_Index

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How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    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.

  2. How accurate are the geographic locations?

    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.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    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.

  5. How consistent are the relationships among the observations, including topology?

    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).

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How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

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.

Distributor 1 of 1

  1. Who distributes the data set?

    State of Connecticut, Department of Enviromental Protection
    79 Elm Street
    Hartford, Connecticut 06106-5127
    USA

    860-424-3540 (voice)
    860-424-4058 (FAX)
    dep.gisdata@ct.gov
    Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time

  2. What's the catalog number I need to order this data set?

    Connecticut USGS 7.5 Minute Quadrangle Index

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

    • Availability in digital form:


    • Data format:
      in format Shapefile, Feature Class (version ArcGIS)
      Network links:http://www.ct.gov/deep

    • Cost to order the data: An online copy of the data may be accessed without charge.


  5. Is there some other way to get the data?

    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.

  6. What hardware or software do I need in order to use the data set?

    Geographic information sytem (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information.

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Who wrote the metadata?

Dates:
Last modified: 20111208

Metadata author:
Howie Sternberg
State of Connecticut, Department of Environmental Protection
79 Elm Street
Hartford, Connecticut 06106-5127
USA

860-424-3540 (voice)
860-424-4058 (FAX)
dep.gisdata@ct.gov
Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata(FGDC-STD-001-1998)

Metadata extensions used:
  • http://www.esri.com/metadata/esriprof80.html

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