Acquisition Date Agency Browse Availability Cloud Cover Coordinates - Decimal Degrees Coordinates - Degrees, Minutes, Seconds Entity ID Event Film Length and Width Flying Height Focal Length Frame Number High Resolution Download Available Image Type Other Photo ID Project Quality Recording Technique Roll Number

Scale Sensor Stereo Overlap Strip Number Vendor ID

Acquisition Date

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

2 = U.S. Bureau of Reclamation

4 = U.S. Bureau of Land Management

5 = NASA AMES Research Center

6 = NASA Johnson Space Center

A = Army Map Service

B = U.S. Air Force

C = U.S. Navy

D = NASA-Wallops Island

E = South Dakota State University

F = NASA Kennedy Space Center

H = EROS Miscellaneous

I = NASA Stennis Space Center

J = Federal Emergency Management Agency (FEMA)

L = National Park Service

M = McDonnell/Douglas

N = U.S. Corps of Engineers

P = EROS Acquired

R = NASA Marshall Space Flight Center

U = Urban Area Photography

Z = Hazards-Hurricane Mitch

Note: The codes associated with the agency are used in the photo and entity Identifiers.

Browse Availability

• Field Definition:  This flag identifies whether the entity has a browse image available. 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 = 0 to 9 percent cloud cover

1 = 10 to 19 percent cloud cover

2 = 20 to 29 percent cloud cover

3 = 30 to 39 percent cloud cover

4 = 40 to 49 percent cloud cover

5 = 50 to 59 percent cloud cover

6 = 60 to 69 percent cloud cover

7 = 70 to 79 percent cloud cover

8 = 80 to 89 percent cloud cover

9 = 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

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

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

Entity ID

• Field Definition:  The Entity ID consist of a two digit data set designator and the Photo ID. The unique accession photo id, developed for each agency, allows identification within the EROS database that is comparable with the agency's original identification.
  

Format:

DDAPPPPPRRRFFFF

DD = Data set designator (AR)

A = Agency

P = Project

R = Roll

F = Frame

Example:

AR5750022260121

Event

• Field Definition:  This field indicates if any specific events are associated with the imagery.
  

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:

.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

• Field Definition:  The flying height above ground level, in feet, 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 Number

• 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. On-demand scanning options for black and white images include 25 microns (1,000 dpi), 14 microns (1,800 dpi), or 7 microns (3,600 dpi). On-demand scanning options for color images include 25 microns (1,000 dpi) or 14 microns (1,800 dpi). Color images are limited to 14-micron due to file size.
  

Image Type

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

Values:

12 = Black & White Infrared

13 = Color Infrared

14 = Color

24 = Black & White

Note: Images are captured as they appear on film and are representative of the full tonal range of the original film source. Images from color negative film are typically available as positive images, however, there are some medium resolution images that may need to be inverted.

Other

• Field Definition:  This field indicates if there are any other pertinent details associated with the imagery.
  

Photo ID

• Field Definition:  The unique accession photo id, developed for each agency, allows identification within the EROS Data Base that is comparable with the agency's original identification.
  

Format:

APPPPPRRRFFFF

A = Agency

P = Project

R = Roll

F = Frame

Example:

5750022260121

Project

• Field Definition:  The project assigned to this image.
  

Quality

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

Values:

0 = Very poor

2 = Poor

5 = Fair

8 = Good to Excellent

NULL = No quality assigned

Recording Technique

• Field Definition:  The recording technique used in acquiring the image frame.
  

Values:

1 = Vertical Cartographic

2 = Vertical Reconnaissance

16 = Low Oblique

17 = High Oblique

Roll Number

• 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.
  

Values:

0 = None

1 = 10%

2 = 20%

3 = 30%

4 = 40%

5 = 50%

6 = 60%

7 = 70%

8 = 80%

9 = 90%

Strip Number

• Field Definition:  Strips were often important keys in creating line indexes for a film project. USGS/EROS has migrated to single frame metadata records rather than relying on historical photo indexes and map-line plots.
  

Vendor ID

• Field Definition:  The name of the file supplied by the vendor.