Connecticut Eelgrass Beds 2002 Field Data

Frequently-asked questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. Where did the data come from?
  2. What changes have been made?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
  6. Is there some other way to get the data?
  7. What hardware or software do I need in order to use the data set?
• Who wrote the metadata?

Field Verification of Eelgrass beds, located in the Long Island Sound, Eastern shore of Connecticut from Clinton Harbor to the Rhode Island State border, Fishers Island NYS and Eastern portion of the Northshore of Long Island NYS.

Visual confirmation using underwater video where eelgrass was not visible by the naked eye.  Use of photo interpreted 1:20,000 true color aerial photography was used to locate submerged aquatic vegetation prior to field work.

1. How should this data set be cited?
   
   
   United States Fish and Wildlife Service, National Wetlands Inventory Region 5, Unpublished Material, Connecticut Eelgrass Beds 2002 Field Data.
   
   
   Online links:

   • http://www.ct.gov/deep

   
   
2. What geographic area does the data set cover?
   
   
   Bounding coordinates:

   West: -72.550140

   East: -71.887851

   North: 41.364791

   South: 41.017052
   
   
3. What does it look like?
   
   
4. Does the data set describe conditions during a particular time period?
   
   
   Calendar date: 9/29/02
   Calendar date: 10/28/02
   Calendar date: 10/22/02
   Calendar date: 9/18/02
   Calendar date: 10/18/02
   Calendar date: 10/15/02
   Calendar date: 10/10/02
   Calendar date: 10/08/02
   Calendar date: 10/04/02
   Calendar date: 10/04/02
   Calendar date: 10/03/02
   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):

      • Entity point (246)
      
      
   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 Field Data

   OBJECTID

   Internal feature number. (Source: ESRI)
                     

   
   

   Sequential unique whole numbers that are automatically generated.

   
   

   Shape

   Feature geometry. (Source: ESRI)
                     

   
   

   Coordinates defining the features.

   
   

   SITE_NO

   Site number given to field verification location

   
   

   DATE_VERIF

   Date of field verification

   
   

   HIGH_TIDE

   Time of high tide on the day of field work

   
   

   TIDE_HEIGHT

   Actual high tide height on day of field work

   
   

   MAP_NAME

   Quad Name field point is located in

   
   

   ESTUARY_BAY

   Approximate esturary field point is located in

   
   

   TIME

   WATER_DEPTH

   Depth of water at time of field verification

   
   

   EEL_GRASS

   Eelgrass present or not present (Source: ESRI)
                     

   
   

   Coordinates defining the features.

   
   

   SHAPE

   Feature geometry. (Source: ESRI)
                     

   
   

   Coordinates defining the features.

   
   

   EST_COVER

   Estimated cover H- high, M - medium,  L - low

   
   

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   
   
   • United States Fish and Wildlife Service, National Wetlands Inventory Region 5
   
   
2. Who also contributed to the data set?
   
   

   United States Fish & Wildlife Service, Region 5 National Wetlands Inventory

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

   USFWS

   NWI Regional Coordinator

   413-253-8620 (voice)

   ralph_tiner@fws.gov

Verification of eelgrass located in the Eastern Long Island Sound and tributaries.

1. Where did the data come from?
   
   
2. What changes have been made?
   
   

   Transfer of X,Y GPS coordinates into a GIS spatial database.  Attribute information was transfered manually.

   
   

   Metadata imported.

   
   

   Data sources used in this process:

   • c:\temp\xml1E.tmp

   
   

   Metadata imported.

   
   

   Data sources used in this process:

   • c:\temp\xmlF.tmp

   
   

   Dataset copied.

   
   

   Data sources used in this process:

   • K:\d_ct\d_eel_grass\fieldpoint04-03

   
   

   Dataset copied.

   
   

   Data sources used in this process:

   • D:\gis_projects\eelgrass\2002\fieldpoints

   
   

   Dataset copied.

   
   

   Data sources used in this process:

   • D:\gis_projects\CoastalResourcesGISData\fieldpoints

   
   

1. How well have the observations been checked?
   
   

   Point data accuaracy based in visual field interpretation.

   
   
2. How accurate are the geographic locations?
   
   

   Base on GPS coordinates

   
   
3. How accurate are the heights or depths?
   
   

   NA

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

   Complete

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

   Based on visual confirmation of eelgrass beds,  Actual sites were based on aerial interpretation of Submerged Aquatic Vegetation SAV from True Color 1:20,000 aerial photography.

   
   

Intended as supplemental information to delineated polygonal data by the USFWS Region 5 NWI

Who distributes the data set?


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


Connecticut Eelgrass Beds 2002 Field Data


What legal disclaimers am I supposed to read?


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



Is there some other way to get the data?


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

300 Westgate Center Drive