Connecticut 2006 NAIP Orthophoto Index

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?

Connecticut 2006 NAIP Orthophoto Index contains polygon features that delineate the boundaries used in the creation of the 2006 National Agricultural Imagery Program (NAIP) digital ortho quarter quads (DOQQs) for Connecticut. This index grid may be used to determine the GeoTIFF image files and the dates each tile image was acquired. Aerial photography was acquired during the summer of 2006. The 2006 NAIP for Connecticut is 1 meter orthorectified imagery, 3Band (natural color), leaf on. The ground resolution for this imagery is 1 meter per image pixel.

1. How should this data set be cited?
   
   
   USDA-FSA-APFO Aerial Photography Field Office, State of Connecticut, Department of Energy and Environmental Protection, 20070101, Connecticut 2006 NAIP Orthophoto Index.
   
   
   Online links:

   • http://www.ct.gov/deep

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

   West: -73.766497

   East: -71.738354

   North: 42.066811

   South: 40.935588
   
   
3. What does it look like?
   
   
   http://www.cteco.uconn.edu/metadata/dep/browsegraphic/orthoindex2006naipfullview.gif (GIF)

   Full view of 2006 NAIP Orthophoto Tile Index
   
   
   http://www.cteco.uconn.edu/metadata/dep/browsegraphic/orthoindex2006naipdetailview.gif (GIF)

   Detail view of 2006 NAIP Orthophoto Tile Index
   
   
4. Does the data set describe conditions during a particular time period?
   
   
   Calendar date: 20060716
   Calendar date: 20060717
   Calendar date: 20060805
   Calendar date: 20060813
   Calendar date: 20060814
   Calendar date: 20060816
   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 (425)
      
      
   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?
   
   
   Connecticut 2006 NAIP Orthophoto Index

   OBJECTID

   Internal feature number. (Source: ESRI)
                     

   
   

   Sequential unique whole numbers that are automatically generated.

   
   

   Shape

   Feature geometry. (Source: ESRI)
                     

   
   

   Coordinates defining the features.

   
   

   CELL_ID

   QUADNAME

   Quarter Quadrangle Name

   
   

   STATE_CODE

   State Code

   
   

   Value	Definition
   CT	Connecticut
   MA	Massachusetts
   NY	New York
   RI	Rhode Island

   
   

   MRC_CODE

   USGS Map Reference Code

   
   

   QUADID

   USGS Quarter Quad Reference Code

   
   

   N_LATITUDE

   North Latitude - latitude of north edge of cell in decimal degrees

   
   

   S_LATITUDE

   South Latitude - Latitude of south edge of cell in decimal degrees

   
   

   E_LONGITUD

   East Longitude - Longitude of the east edge of the cell in decimal degrees

   
   

   W_LONGITUD

   West Longitude - Longitude of the west edge of the cell in decimal degrees

   
   

   EXTENT_TYP

   Extent Type

   
   

   Value	Definition
   U	Undersized
   O	Oversized
   I	Irregular
   S	Standard on grid
   F	Standard off grid

   
   

   TOP_LAT

   North Bound in decimal degrees

   
   

   LEFT_LON

   West Bound in decimal degrees

   
   

   BOTTOM_LAT

   South Bound in decimal degrees

   
   

   RIGHT_LON

   East Bound in decimal degrees

   
   

   FIPS_CODES

   Space separated list of StateCounty FIPS code of county within one mile of quarter quad 

   
   

   USGSID

   USGS latitude/longitude identifier for quadrangle

   
   

   Qdrnt

   Quarter Quad Quadrant

   
   

   Value	Definition
   NW	Northwest
   NE	Northeast
   SW	Southwest
   SE	Southeast

   
   

   UTM

   UTM Zone of the quarter quadrangle area

   
   

   Value	Definition
   18	UTM Zone 18
   19	UTM Zone 19

   
   

   Res

   SrcImgDate

   Source Image Date - date imagery was acquired for the quarter quad

   
   

   Value	Definition
   20060716	July 16, 2006
   20060717	July 17, 2006
   20060805	August 5, 2006
   20060813	August 13, 2006
   20060814	August 14, 2006
   20060816	August 16, 2006

   
   

   VerDate

   Version Date - date quarter quad imagery was published by USDA-FSA-APFO

   
   

   Value	Definition
   20070201	February 1, 2007
   20070212	February 12, 2007

   
   

   SHAPE

   Feature geometry. (Source: ESRI)
                     

   
   

   Coordinates defining the features.

   
   

   FileName

   DOQQ file name

   
   

   SHAPE.area

   SHAPE.len

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   
   
   • USDA-FSA-APFO Aerial Photography Field Office
   • State of Connecticut, Department of Energy and Environmental Protection
   
   
2. Who also contributed to the data set?
   
   
3. To whom should users address questions about the data?
   
   

This index is used to determine the GeoTIFF image files and the dates each tile image was acquired for the 2006 NAIP imagery for Connecticut.

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

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?
   
   

None. No restrictions or legal prerequisites for using the data.

Who distributes the data set?


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


Connecticut 2006 NAIP Orthophoto Index


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



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



Is there some other way to get the data?


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

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