FGDC Classic | FGDC FAQ | FGDC Plus | XML

Connecticut Eelgrass Beds 2002 Poly

Frequently-asked questions:

What does this data set describe?

Connecticut Eelgrass Beds 2002 Poly

Interpretation and identification of Eelgrass beds located in the Long Island Sound Eastern Connecticut shoreline, Fishers Island NYS and the Northshore of Long Island NYS.  Generated from 1:20,000 True Color Aerial Photography, 6/18/02.

  1. How should this data set be cited?

    United States Fish and Wildlife Service, National Wetlands Inventory Region 5, March 2003, Connecticut Eelgrass Beds 2002 Poly.

    Online links:
  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -72.476148
    East: -71.874189
    North: 41.380502
    South: 41.248532

  3. What does it look like?

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/eelgrassbed2002fullview.gif (GIF)
    Full view of 2002 eelgrass beds.

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/eelgrassbed2002detailview.gif (gif)
    Detail view of 2002 eelgrass beds.

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

    Calendar date: 6/18/02
    Currentness reference:
    ground condition

  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?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (161)

    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 Eelgrass Beds 2002 Poly
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    Area of polygon in arces

    Polygon field checked -  Y = yes, N = no

    Site number of polygon

    Estimated density of eelgrass - H = high, M = medium, L = low

    Interpretation signature of True Color 1:20,000 photo

    Eelgrass present - Y= yes, N = No

    Assigned sub-watershed number

    Area in Hectares (Source: ESRI)

    Coordinates defining the features.

    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    Sub-watershed in proximity to polygon

Back to Top

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?

    Ralph Tiner
    NWI Regional Coordinator
    413-253-8620 (voice)
Back to Top

Why was the data set created?

Delineate eelgrass located in the Eastern Long Island Sound and tributaries.

Back to Top

How was the data set created?

  1. Where did the data come from?

    Type of source media: Digital imagery and hard copy transparency
    Source scale denominator: DOQQ 1:12,000 & 1:20,000True Color aerial transparency

  2. What changes have been made?

    Use of Digital Transfer Scope to create data layer from aerial photo.  Geo-reference based on State of CT DOQQ's.

    Metadata imported.

    Data sources used in this process:
    • c:\temp\xml1E.tmp

    Dataset copied.

    Data sources used in this process:
    • K:\d_ct\ct_eel_12

    Dataset copied.

    Data sources used in this process:
    • D:\gis_projects\eelgrass\2002\ct_eelgrass

    Dataset copied.

    Data sources used in this process:
    • D:\gis_projects\CoastalResourcesGISData\ct_eelgrass

Back to Top

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

  1. How well have the observations been checked?

    Based on field work and photo interpretation of 1:20,000 true color photography

  2. How accurate are the geographic locations?

    Based on 1:12,000 Connecticut DOQQ's and the positioning of 1:20,000 true color aerial photography using the Digital Transfer Scope (DTS)

  3. How accurate are the heights or depths?


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

    Complete, based on field work and interpretation

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

    Based on 1:20,000 aerial photography

Back to Top

How can someone get a copy of the data set?

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

Access constraints: none
Use constraints:

Distributor 1 of 1

  1. Who distributes the data set?

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

    Connecticut Eelgrass Beds 2002 Poly

  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) Size: 0.079
      Network links:http://www.ct.gov/deep

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

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

Back to Top

Who wrote the metadata?

Last modified: 20120119

Metadata author:
USFWS, National Wetlands Inventory Region 5
300 Westgate Center Drive
Hadley, Massachusetts 01035

413-253-8200 (voice)

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

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

  • Back to Top