SPOT 1-4 (1986-1998) Data Dictionary

 

Acquisition Date

• Field Definition:  The date the image was acquired.

              Format:

              YYYY/MM/DD

 

Aggregate Cloud Cover

• Field Definition:  Aggregate Cloud Cover is the percentage of a scene that is obscured by clouds and is the average of all four quadrant cloud cover values.

              Values:

              0 - 100

 

Band (1-3) Gain

• Field Definition:  The band gain condition detected at the start of the SPOT scene.

              Values:   

              Valid Codes:

              0 - 8

 

Browse Availability

• 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. This is an on-line digital (raster format) image of an individual scene.

              Valid Codes:

              Y = Yes

              N = No

 

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:  This field uniquely identifies data which can be ordered in any combination of unique products.

              Format:

              SP25352709809171907311X1

              SP = Dataset designator

              2 = Satellite number

              535 = Path

              270 = Row

              98 = Last two digits-year of acquisition

              09 = Month of acquisition

              17 = Day of acquisition

              19 = Hour of acquisition

              07 = Minute of acquisition

              31 = Second of acquisition

              1 = HRV number

              X = Sensor Mode

              1 = Version number

 

Flight Direction

• Field Definition:  The code used to indicate the satellite's orbital direction that applied when this data was acquired.

               Values:

               D = Descending

               A = Ascending

 

GRS K

• Field Definition:  The GRS K (path)Grid Reference System. The SPOT Grid Reference System (GRS) is used to identify the geographic location of SPOT images. The grid is made up of nodes located at the intersection of columns (K) and rows (J). When data strips are split into scenes, the SPOT GRS links each scene with two K,J designators representing a GRS node. Once the K,J designators have been identified for a new scene, the designators are added to that scene's characteristics file.

              Values:

              001 through 738

 

GRS J

• Field Definition:  The GRS J (row)Grid Reference System. The SPOT Grid Reference System (GRS) is used to identify the geographic location of SPOT images. The grid is made up of nodes located at the intersection of columns (K) and rows (J). When data strips are split into scenes, the SPOT GRS links each scene with two K,J designators representing a GRS node. Once the K,J designators have been identified for a new scene, the designators are added to that scene's characteristics file.

               Values:

               009 through 691

 

Image Mode

• Field Definition:  The image mode used to image this scene.

              Valid Codes:

              D = Direct

              X = Recorded

 

Image Quality

• Field Definition:  A number that represents the SPOT image quality value.

               Valid Codes:

               8 = Very Good

               5 = Good

               2 = Poor

               0 = Very Poor

 

NE Cloud Cover

• Field Definition:  Indicates the percent of cloud cover in the upper right quadrant of the scene. Users are encouraged to preview browses prior to ordering data products to confirm acceptable cloud cover impacts.

              Values:

              0 - 100

 

NW Cloud Cover

• Field Definition:  Indicates the percent of cloud cover in the upper left quadrant of the scene. Users are encouraged to preview browses prior to ordering data products to confirm acceptable cloud cover impacts.

              Values:

              0 - 100

 

Off Nadir Angle

• Field Definition:  Off Nadir Angle value shown in decimal degrees.
  
   

Orientation

• Field Definition:  The image orientation indicates deviation from true north (nadir) in degrees.
  
   

Processing Level

• Field Definition:  The processing level indicates the type of correction that has been applied to the scene. For multispectral scenes, bands are provided in 3 (Near IR), 2 (Red), 1 (Green), and 4 (ShortWave IR) order.

              Values:

              Level 1T (L1T) = Radiometric, systematic and geometric corrections incorporating ground control points have been applied while employing a 90-meter Digital Elevation Model (DEM) for topographic accuracy. Geodetic accuracy of the product depends on the accuracy of the ground control points and are expected to be within 2.5 pixels. L1T scenes are available in GeoTIFF format.

             Full Resolution Browse = A full resolution image provided in JPEG format for scenes that have been processed to Level 1T.

             GIS Ready Bundle = A full resolution image in JPEG format is bundled with metadata and a world file to use in geographic  information systems, image processing software and web mapping applications. This option provides users with a georeferenced JPEG image and is only available for scenes that have been processed to Level 1T.

 

Satellite

• Field Definition:  The satellite which acquired the data

              Values:

              SPOT-1

              SPOT-2

              SPOT-3

 

Scene ID

• Field Definition:  This field identifies data which can be ordered in any combination of unique products.

              Format:

              25352709809171907311X

              2 = Satellite number

              535 = Path

              270 = Row

              98 = Last two digits-year of acquisition

              09 = Month of acquisition

              17 = Day of acquisition

              19 = Hour of acquisition

              07 = Minute of acquisition

              31 = Second of acquisition

              1 = HRV number

              X = Sensor Mode

 

Scene Start Time

• Field Definition:  The configuration stating the year, day, hour, minute, second in which the satellite was turned on for image swathing.

              Format:

              YY - two-digit year

              DDD - day (001-366*)(* for leap year)

              HH - hours (00-23)

              MM - minutes (00-59)

              SS - second (00-59)

              TTT - fractional seconds

 

Scene Stop Time

• Field Definition:  The configuration stating the year, day, hour, minute, second in which the satellite was turned off for image swathing.

              Format:

              YY - two-digit year

              DDD - day (001-366*)(* for leap year)

              HH - hours (00-23)

              MM - minutes (00-59)

              SS - second (00-59)

              TTT - fractional seconds

 

Sensor Mode

• Field Definition:  The sensor mode used while acquiring the data

              Values:

              PAN = Panchromatic

              XS = Multispectral

 

Sensor Type

• Field Definition:  The sensor used while acquiring this scene.

              Values:

              HRV

SE Cloud Cover

• Field Definition:  Indicates the percent of cloud cover in the lower right quadrant of the scene. Users are encouraged to preview browses prior to ordering data products to confirm acceptable cloud cover impacts.

              Values:

              0 - 100

 

SW Cloud Cover

• Field Definition:  Indicates the percent of cloud cover in the lower left quadrant of the scene. Users are encouraged to preview browses prior to ordering data products to confirm acceptable cloud cover impacts.

               Values:

               0 - 100

 

Sun Azimuth

• Field Definition:  Azimuth is the angle of horizontal deviation, measured clockwise, of a bearing from a standard direction. The Sun azimuth angle at the scene center.

              Values:

              -180.0000000 through +180.0000000 degrees (with 7-digit precision).

               NOTE: A positive value

 

Sun Elevation

• Field Definition:  Elevation is the angle of vertical deviation, measured clockwise, of a bearing from a standard direction. The Sun elevation angle at the scene center.

              Values:

              - 90.0000000 through + 90.0000000 degrees (with a 7-digit precision)

              NOTE: A positive value

 

Version Number

• Field Definition:  The version number associated with the image.

               Valid Codes:

               1 - 99

 

Viewing Angle (HRV Imaging Instrument)

• Field Definition:  The imaging instrument used during acquisition of this scene.

               Valid Codes:

               1 = HRV1 (High Resolution-Front mounted)

               2 = HRV2 (High Resolution-Rear mounted)