Aerial Photo Mosaics Data Dictionary

Acquisition Date

Field Definition:  The acquisition date refers to the year, month, and day the photographs used in the mosaic were acquired.

     Format:

          YYYY/MM/DD

          YYYY = Year

          MM = Month

          DD = Day

Agency

Field Definition:  The name of the agency that acquired the photography and the EROS code associated with the agency.

     Values:

          1 = U.S. Geological Survey

          4 = U.S. Bureau of Land Management

          A = Army Map Service

          B = U.S. Air Force

          C = U.S. Navy

          L = National Park Service

          N = U.S. Corps of Engineers

Cloud Cover

Field Definition:  The average percent of each photograph used in the mosaic 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

 

Date of Update

Field Definition:  The date this record was last updated.

     Format:

          YYYY/MM/DD

          YYYY = Year

          MM = Month

          DD = Day

 

Entity ID

Field Definition:  This field describes the naming convention of each mosaic.

     Format:

          DDTTAPPPPPNNNNNNN

 

          DD = Data set designator (Aerial Records)

          TT = Index Type

          A = Agency

          PPPPP = Project

          NNNNNNN = Index Number

          Example:

               ARDDATM0000920238

 

Flying Height

Field Definition:  The flying height above ground level, in feet, at which the photography was acquired.

 

Image Quality

Field Definition:  A numeric rating of the overall image quality of the index.

 

Image Type

Field Definition:  The image type indicates the film type of the photographs used in the mosaic.

     Values:

          Black & White

          Color

          Color Infrared

 

Project

Field Definition:  The project associated with the photographs in the mosaic.

 

Recording Technique

Field Definition:  The recording technique used to acquire the photographs in the mosaic.

 

Scale

Field Definition:  The scale of the images used in the mosaic is the ratio of the distance on the image compared to the equivalent distance on the ground.

 

Single Frame Product Available

Field Definition:  This field indicates the availability of individual frames used in the mosaic. Frame level records are available from the Aerial Photo Single Frames data set.

 

Stereo Overlap

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

 

Browse Availability Flag/Image Preview

Field Definition:  This flag identifies whether or not the entity has a browse image available with it. A browse image provides the user with a visual overview of an inventory item to check cloud cover and to verify that the area of interest is contained in the selected frame.

          Values:

          Yes

          No