Connecticut 2010 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 2010 NAIP Orthophoto Index contains polygon features that delineate the boundaries used in the creation of the 2010 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 2010. The 2010 NAIP for Connecticut is 1 meter orthorectified imagery, 4Band (natural color and color infrared), 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, 20110101, Connecticut 2010 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: -71.739325

   North: 42.066812

   South: 40.936017
   
   
3. What does it look like?
   
   
   http://www.cteco.uconn.edu/metadata/dep/browsegraphic/orthoindex2010naipfullview.gif (GIF)

   Full view of 2010 NAIP Orthophoto Tile Index
   
   
   http://www.cteco.uconn.edu/metadata/dep/browsegraphic/orthoindex2010naipdetailview.gif (GIF)

   Detail view of 2010 NAIP Orthophoto Tile Index
   
   
4. Does the data set describe conditions during a particular time period?
   
   
   Calendar date: 20100814
   Calendar date: 20100817
   Calendar date: 20100819
   Calendar date: 20100829
   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 (412)
      
      
   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 2010 NAIP Orthophoto Index

   OBJECTID

   Internal feature number. (Source: ESRI)
                     

   
   

   Sequential unique whole numbers that are automatically generated.

   
   

   ST

   State Code

   
   

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

   
   

   QQNAME

   Quarter Quad Name

   
   

   QKEY

   Quarter Quad Code

   
   

   QUADRANT

   Quarter Quad Quadrant

   
   

   Value	Definition
   NW	Northwest
   NE	Northeast
   SW	Southwest
   SE	Southeast

   
   

   APFONAME

   Aerial Photography Field Office Name

   
   

   GNIS

   Geograhic Names Information System Identifier

   
   

   DY

   Latitude degree of southeast corner of quarter quad

   
   

   MY

   Latitude minute of southeast corner  of quarter quad

   
   

   SY

   Latitude second of southeast corner  of quarter quad

   
   

   DX

   Longitude degree of southeast corner  of quarter quad

   
   

   MX

   Longitude minute of southeast corner of quarter quad

   
   

   SX

   Longitude second of southeast corner of quarter quad

   
   

   OLAT

   Latitude of quarter quad southeast corner in degrees, minutes, and seconds

   
   

   OLONG

   Longitude of quarter quad southeast corner in degrees, minutes, and seconds

   
   

   ArcKey

   LatitudeLongitude of quarter quad southeast corner

   
   

   ColorBand

   Color Band

   
   

   Value	Definition
   NC	definition unknown

   
   

   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

   Unknown

   
   

   Value	Definition
   1	definition unknown

   
   

   SrcImgDate

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

   
   

   Value	Definition
   20100814	August 14, 2010
   20100817	August 17, 2010
   20100819	August 19, 2010
   20100829	August 29, 2010

   
   

   VerDate

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

   
   

   Value	Definition
   20100928	September 28, 2010

   
   

   FileName

   DOQQ file name

   
   

   SHAPE

   Feature geometry. (Source: ESRI)
                     

   
   

   Coordinates defining the features.

   
   

   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 2010 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 2010 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?

79 Elm Street