Land Cover Trends Geotagged Photography Data Dictionary

Acquisition Date

• Field Definition:  The year, month, and day that the image was acquired.

               Format:
               YYYY/MM/DD
               YYYY = Year
               MM = Month
               DD = Day
 

Agency

• Field Definition:  The agency responsible for acquiring the imagery.

               Example:
               USGS
 

Camera

• Field Definition:  The type of camera used to acquire the imagery.

               Example:
               Nikon, Canon
 

Coordinates Decimal Degrees

• Field Definition:  The latitude and longitude are provided in decimal degrees for the Scene Center.

              Format:
              Latitude Format Decimal Degrees: -90.0000 through 90.0000
              Longitude Format Decimal Degrees: -180.0000 through 180.0000
 

Coordinates Degrees, Minutes, Seconds

• Field Definition:  The latitude and longitude are provided in degrees, minutes, and seconds for the Scene Center.

               Format:
               Latitude Format:
               DDMMSS.SSH
               DD = Degree(s) with a range of 0 through 90
               MM = Minutes(s) with a range of 0 through 59
               SS.SS = Second(s) with a range of 0 through 59.99
               H = Hemisphere with N for north and S for south
 

Date Entered

• Field Definition:  The year, month, and day that the images and related metadata were entered into the database.

               Format:
               YYYY/MM/DD
               YYYY = Year
               MM = Month
               DD = Day
 

Dots Per Inch

• Field Definition:  Dots Per Inch (DPI) is used to measure the resolution of the image. The higher the DPI, the better the sharpness and clarity of the image.
   

Ecoregion Name

• Field Definition:  The descriptive name of the ecoregion corresponding to the Ecoregion Number.
   

Ecoregion Number

• Field Definition:  An ecoregion is an ecologically and geographically defined area that is distinguished by its natural features and environment.
  
  The Land Cover Trends Projects utilizes 84 ecoregions for the conterminous United States. An Ecoregion map, alphabetical list by Ecoregion Name, and numerical list by Ecoregion Number can be found at http://landcovertrends.usgs.gov/map.html.
   

Entity ID

• Field Definition:  The unique identifier assigned to each image.

               Format:
               LCTNDD_DDDDWDDD_DDDDYYYYMMDDNNNNN
               LCT = Dataset identifier
               N = GPS latitude reference (directional indicator)
               DD_DDDD = Center latitude
               W = GPS longitude reference (directional indicator)
               DDD_DDDD = Center longitude
               YYYYMMDD = Acquisition date
               NNNNN = Sequential number, zero-padded to five digits

               Example:
               LCT01N40_5375W124_06682002080100001
 

Keywords

• Field Definition:  Words used to describe the content of the image. Keywords include Level I Ecoregion (EI), Level II Ecoregion (EII), Level III Ecoregion (EIII), Land Use/Land Cover classification, and any notable comments about conditions, patterns, or changes.
   

Number of Bands

• Field Definition:  The number of bands of data contained in the imagery.
   

Vendor ID

• Field Definition:  The identifying filename assigned by the Land Cover Trends Project.