Space Acquired Photography Data Dictionary

Acquisition Date

• Field Definition:  The acquisition date refers to the year, month, and day the image was acquired.

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

Agency

• Field Definition:  The agency that acquired the photography along with the spaceflight program or project.

              Values:
              NASA Apollo, Gemini, ASTP, LFC (where ASTP = Apollo-Soyuz Test Project and LFC = Large Format Camera)
              NASA Skylab Satellite
 

Browse Availability

• Field Definition:  This flag identifies whether the entity has a browse image available or not. A browse image provides the user with a visual overview of an inventory item.
  
  Note: Preview images are resampled from the original data and may not accurately represent the full resolution product.
   

Cloud Cover

• Field Definition:  The percent of the frame that is obscured by clouds.

              Values:
              0 to 9 percent cloud cover
             10 to 19 percent cloud cover
             20 to 29 percent cloud cover
             30 to 39 percent cloud cover
             40 to 49 percent cloud cover
             50 to 59 percent cloud cover
             60 to 69 percent cloud cover
             70 to 79 percent cloud cover
             80 to 89 percent cloud cover
             90 to 100 percent cloud cover
 

Coordinates Decimal Degrees

• Field Definition:  The latitude and longitude are provided in decimal degrees for the following fields:

                 Values:
                 Scene Center Latitude and Longitude
                 Northeast (NE) Corner Latitude and Longitude
                 Northwest (NW) Corner Latitude and Longitude
                 Southeast (SE) Corner Latitude and Longitude
                 Southwest (SW) Corner Latitude and Longitude

                 Latitude Format Decimal Degrees: -90.000 through 90.000
                 Longitude Format Decimal Degrees: -180.000 through 180.000

                Number of decimal places will vary by dataset – check collection in EE.
 

Coordinates Degrees, Minutes, Seconds

• Field Definition:  The latitude and longitude are provided in degrees, minutes, and seconds for the following fields:

                 Values:
                 Scene Center Latitude and Longitude
                 Northeast (NE) Corner Latitude and Longitude
                 Northwest (NW) Corner Latitude and Longitude
                 Southeast (SE) Corner Latitude and Longitude
                 Southwest (SW) Corner Latitude and Longitude

                Longitude Format:
                DDDMMSS.SSH
                DDD = Degree(s) with a range of 0 through 180
                MM = Minute(s) with a range of 0 through 59
                SS.SS = Second(s) with a range of 0 through 59.99
                H = Hemisphere with E for east and W for west

                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
 

Entity ID

• Field Definition:  The filename assigned to the image.

               Format:
               Apollo, Gemini, ASTP, LFC = DDAPPPPPRRRFFFF
               Skylab = DDAPPPPRRFFF000
               D = Data set designator (AR)
               A = Agency, where 7 = Apollo, Gemini, ASTP, LFC and G = Skylab Satellite
               P = Project
               R = Roll
               F = Frame
               0 = Zero fill for Skylab products

               Example:
               Apollo, Gemini, ASTP, LFC = AR7S41000701686
               Skylab = ARG20A001059000
 

Event

• Field Definition:  This field is used to indicate specific events associated with the image such as floods or hurricanes.
   

Film Length and Width

• Field Definition:  The length and width of image frame contained on the roll of film.

              Values:
              Conversion: 1 inch = 25.4 millimeters
              Conversion Chart:
              0.63 inches = 16mm
              1.37 inches = 35mm
              2.25 inches = 57mm
              5.00 inches = 127mm
              7.00 inches = 178mm
              9.00 inches = 229mm
              18.0 inches = 457mm
              38.0 inches = 965mm
              50.0 inches = 1270mm
              60.0 inches = 1524mm
 

Flying Height in Feet

• Field Definition:  The flying height above ground level at which the frame was acquired.
   

Focal Length

• Field Definition:  The focal length, in millimeters, of the sensor used to record the images on the film source. Conversion: 1 inch = 25.4 millimeters
   

Frame

• Field Definition:  The number assigned to a photographic frame on a roll of film.
   

High Resolution Download Available

• Field Definition:  This field indicates if a high resolution download is currently available for the product. Standard high resolution products are at a resolution of 25 microns or 1,000 dots per inch (dpi). Medium resolution products are at a resolution of 63 microns or 400 dpi.
  
  Note: EarthExplorer will have a shopping basket icon on the results page for images that are available for on-demand scanning at 25 microns (1,000 dpi) or 14 microns (1,800 dpi).
   

Image Type

• Field Definition:  The image type resulting from the film type used.

              Values:
              Black & White
              Color
              Infrared (B&W)
              Infrared (Color)
 

Project

• Field Definition:  The project assigned to this image.
   

Quality

• Field Definition:  A rating of the overall image quality of the frame

              Values:
              Good to Excellent
              Fair
              Poor
              Very poor
              NULL = No quality assigned
 

Recording Technique

• Field Definition:  The method used to obtain the photographic image.

               Values:
               High Oblique
               Low Oblique
               Vertical Cartographic
               Vertical Reconnaissance
 

Roll

• Field Definition:  The number assigned to the film roll.
   

Scale

• Field Definition:  The scale of the image is the ratio of the distance on the image compared to the equivalent distance on the ground.
   

Sensor

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

Stereo Overlap

• Field Definition:  Amount of image (stereo) overlap in ten percent increments.