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USGS 2008 High Resolution Orthoimagery Index for the Bridgeport, Hartford, and New Haven, Connecticut Urban Areas

Frequently-asked questions:


What does this data set describe?

Title:
USGS 2008 High Resolution Orthoimagery Index for the Bridgeport, Hartford, and New Haven, Connecticut Urban Areas

Abstract:
USGS 2008 High Resolution Orthoimagery Index for the Bridgeport, Hartford, and New Haven, Connecticut Urban Areas contains polygon features that delineate the boundaries used in the creation of the 2008 USGS High Resolution Area digital ortho photos for the Bridgeport, Hartford, and New Haven Connecticut urban areas. This index grid may be used to determine the orthophoto image files that aquired for the aerial photography, which was taken during the spring of 2008. It is 1 foot  orthorectified imagery, 3Band (natural color), leaf off. The ground resolution for this imagery is 1 foot per image pixel.

  1. How should this data set be cited?

    U.S. Geological Survey, State of Connecticut, Department of Energy and Environmental Protection, 20091005, USGS 2008 High Resolution Orthoimagery Index for the Bridgeport, Hartford, and New Haven, Connecticut Urban Areas: U.S. Geological Survey, Sioux Falls, SD.

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

    Bounding coordinates:
    West: -73.773336
    East: -72.111622
    North: 42.009657
    South: 40.991647

  3. What does it look like?

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/orthoindex2008usgsfullview.gif (GIF)
    Full view of 2008 High Resolution Urban Area Orthoimagery Index

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/orthoindex2008usgsdetailview.gif (GIF)
    Detail view of 2008 High Resolution Urban Area Orthoimagery Index

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

    Calendar date: 20080401
    Currentness reference:
    ground condition when photography was acquired

  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 (2923)

    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 0.000328.
      Ordinates (y-coordinates) are specified to the nearest 0.000328.
      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?

    USGS 2008 High Resolution Orthoimagery Index
    OBJECTID
    Internal feature number. (Source: ESRI)
                      

    Sequential unique whole numbers that are automatically generated.

    ORTHO_TILE
    Orthophoto tile name - Unique name assigned to each orthophoto tile, which is the basis for individual image files names such as 18TXL660975.tif

    SHAPE
    Feature geometry. (Source: ESRI)
                      

    Coordinates defining the features.

    SHAPE.area
    SHAPE.len
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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?

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Why was the data set created?

This index is used to determine the name of the orthophoto image file aquired for each tile. 

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How was the data set created?

  1. Where did the data come from?

  2. What changes have been made?

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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 observations, including topology?

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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. Please include this metadata record in any redistributions.
Use constraints:
None. No restrictions or legal prerequisites for using the data.

Distributor 1 of 1

  1. Who distributes the data set?

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

    USGS 2008 High Resolution Orthoimagery Index for the Bridgeport, Hartford, and New Haven, Connecticut Urban Areas

  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?

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

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Who wrote the metadata?

Dates:
Last modified: 20111208

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

860-424-3540 (voice)

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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