Unmanned Aerial Systems (UAS) Data Dictionary

 

Acquisition Start Date

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

                 Format:

                 YYYY/MM/DD

                 YYYY = Year

                 MM = Month

                 DD = Day

 

Agency

• Field Definition:  The organization that initiated the acquisition of the imagery.
  
   

Altitude

• Field Definition:  The flying height above ground level at which the data were acquired.
  
   

Collect

• Field Definition:  A name assigned to a single flight duration.
  
   

Compressed File Size

• Field Definition:  The file size of the compressed data for the download.
  
   

Coordinates Decimal Degrees

• Field Definition:  The latitude and longitude are provided in decimal degrees for the following fields for georeferenced products:
  
  
  
  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
  
  
  
  *UAS Photos are geotagged with Center Coordinates.

               Format:

               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 EarthExplorer.

 

Coordinates Degrees, Minutes, Seconds

• Field Definition:  The latitude and longitude are provided in degrees, minutes, and seconds for the following fields for georeferenced products:
  
  
  
  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
  
  
  
  *UAS Photos are geotagged with Center Coordinates.

               Format:

               Longitude Format: DDDMMSS.SSH

               DDD = Degrees with a range of 0 through 180

               MM = Minutes with a range of 0 through 59

               SS.SS = Seconds with a range of 0 through 59.99

               H = Hemisphere with E for east and W for west

               Latitude Format: DDMMSS.SSH

               DD = Degrees with a range of 0 through 90

               MM = Minutes with a range of 0 through 59

               SS.SS = Seconds with a range of 0 through 59.99

               H = Hemisphere with N for north and S for south

               Note: Number of decimal places will vary by dataset – check collection in EarthExplorer.

 

Date Entered

• Field Definition:  The year, month, and day the record was entered into the EROS database.
  
   

Data Type

• Field Definition:  The type of Unmanned Aerial Systems data.

                 Values:

                 dem = Digital Elevation Data

                 ptCloud = Point Cloud Data

                 raw = Raw Camera Imagery

                 ortho = Orthoimagery

 

Datum

• Field Definition:  The horizontal reference system used to map the data.

                Example:

                WGS84

 

Elevation Model

• Field Definition:  The type of Digital Elevation Model data available for download.

                 Values:

                 All = Returns DSM and DTM products

                 DSM = Digital Surface Model

                 DTM = Digital Terrain Model

 

Entity ID

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

                 Format:

                 PPPPPPPPMMMMMMMMSSSSSSDDNNNNNN

                 PPPPPPPP = Project Short Name

                 MMMMMMMM = Mission Short Name

                 SSSSSSS = Sensor

                 DD = Data File Type

                 NNNNNN = Sequential number generated at time of ingest

                 Example:

                 PPDEBLCO20130600CSX26002000001

Field Center

• Field Definition:  The Field Center associated with organization that initiated the acquisition of the imagery

Focal Length

• Field Definition:  The distance from the optical center of a lens to the point where light rays from a very distant object converge.
  
   

Map Projection

• Field Definition:  The projected coordinate system used to define the location of the data.

                 Example:

                 UTM

 

Mission

• Field Definition:  A name assigned to a set of UAS data files for a specific acquisition period for a project.
  
   

Number of Bands

• Field Definition:  Number of spectral bands contained in the image.
  
   

Ortho Correction Model

• Field Definition:  The model used to create the orthoimagery.
  
   

Pitch

• Field Definition:  The movement up and down along a vertical axis from the front to the back of the UAS.
  
   

Pixel Height

• Field Definition:  The vertical measurement/dimension of the image expressed in pixels.
  
   

Pixel Width

• Field Definition:  The horizontal measurement/dimension of the image expressed in pixels.
  
   

Platform

• Field Definition:  The type of UAS platform used to acquire the data.

                 Example:

                 Falcon Fixed Wing

 

Project

• Field Definition:  A name given to a set of UAS data files that identifies the area of coverage.
  
   

Roll

• Field Definition:  The rotation of the UAS from nose to tail as the aircraft moves forward, backward, left, or right along a horizontal axis.
  
   

Sensor

• Field Definition:  The aerial camera or imaging system used to obtain the data.

                 Example:

                 Canon Powershot SX260

 

Uncompressed File Size

• Field Definition:  The file size of the data prior to compressing for the download package.
  
   

Vendor Filename

• Field Definition:  The filename assigned by the original vendor.
  
   

Yaw

• Field Definition:  The rotation of the UAS from the center axis in a clockwise or counterclockwise direction (spinning motion).