Landsat 8 OLI/TIRS Collection 1 Data Dictionary Active

 

Acquisition Date

• Field Definition:  The year, month and day that the scene was acquired.

              Format:
              YYYY/MM/DD
 

Bias Parameter File Name OLI

• Field Definition:  The name of the Bias Parameter File containing the radiometric correction parameters applied during Level-1 processing of OLI data.
   

Bias Parameter File Name TIRS

• Field Definition:  The name of the Bias Parameter File containing the radiometric correction parameters applied during Level-1 processing of TIRS data.
   

Calibration Parameter File

• Field Definition:  The name of the Calibration Parameter File containing the radiometric and geometric coefficients used to process the raw, uncorrected Landsat OLI/TIRS image data.
   

Collection Category

• Field Definition:  Landsat Collection 1 is organized by a tiered inventory structure to indicate the quality and level of processing of the data.
  
    Values:
    T1 = Tier 1 is the highest available quality and processing level. This category is suitable for time-series analysis across      the different Landsat sensors.
  
    T2 = Tier 2 scenes contain significant cloud cover and have insufficient ground control to generate precision and terrain      corrected products.
  
    RT = Real-Time indicates initial processing with additional processing required to achieve Tier 1 or Tier 2.
   

Collection Number

• Field Definition:  Landsat Collections provides a quality controlled selection of radiometrically calibrated and consistently geolocated data with sufficiently geographically aligned pixels to support time series analysis through the full Landsat record.
   

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
 

Corner Latitude and Longitude Product

• Field Definition:  The latitude and longitude value (degrees) are provided for the upper left corner (northwest corner for descending coverage / southeast corner for ascending coverage) of the product including the black fill. In the case of non-Earth or ancillary-only intervals, zero (0) is used as a placeholder.

               Values:
               Corner Upper Left (UL) Product Latitude
               Corner Upper Left (UL) Product Longitude
               Corner Upper Right (UR) Product Latitude
               Corner Upper Right (UR) Product Longitude
               Corner Lower Left (LL) Corner Latitude
               Corner Lower Left (LL) Corner Longitude
               Corner Lower Right (LR) Corner Latitude
               Corner Lower Right (LR) Corner Longitude

               Latitude Format:
               dd.ddddd (DDMMSS.SSH)
               dd.ddddd = Decimal Degrees*
               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

               * A positive (+) value indicates geographic North latitude. A negative (-) value indicates geographic South latitude.

              Latitude Example:
              42.74227 (42°44'32.17"N)

              Longitude Format:
              ddd.ddddd (DDDMMSS.SSH)
              ddd.ddddd = Decimal Degrees**
              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

             ** A positive (+) value indicates geographic East longitude. A negative (-) value indicates geographic West longitude.

              Longitude Example:
              -122.20707 (122°12'25.45"W)
 

Data Type Level-1

• Field Definition:  Data Type Level-1 indicates the highest level of correction that has been applied to the scene.

               Values:

               L1GS = Systematic Correction (Level-1GS) provides systematic, radiometric, and geometric accuracy, which is derived from                 data collected by the sensor.

               L1GT = Systematic Terrain Correction (Level-1GT) provides systematic, radiometric, and geometric accuracy, while                             employing a Digital Elevation Model (DEM) for topographic accuracy.

               L1TP = Precision Terrain Correction (Level-1TP) provides systematic, radiometric, and geometric accuracy by incorporating                 ground control points while employing a Digital Elevation Model (DEM) for topographic accuracy.
 

Date L-1 Generated

• Field Definition:  The most recent date that the Level-1 Product has been produced.
   

Datum

• Field Definition:  The horizontal reference system associated with the image.

               Values:
               WGS84 = World Geodetic System 1984
 

Day/Night Indicator

• Field Definition:  This field indicates whether the data was acquired during a daytime or nighttime pass.

               Values:
               DAY = Day scene
               NIGHT = Night scene
 

Ellipsoid

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

               Values:
               WGS84 = World Geodetic System 1984
 

Geometric RMSE Model

• Field Definition:  Combined RMSE (Root Mean Square Error) of the geometric residuals (meters) in both across-track and along-track directions measured on the GCPs (Ground Control Points) used in geometric precision correction.
   

Geometric RMSE Model X

• Field Definition:  RMSE (Root Mean Square Error) of the geometric residuals (meters) measured on the GCPs (Ground Control Points) used in geometric precision correction in the along-track direction.
   

Geometric RMSE Model Y

• Field Definition:  RMSE of the geometric residuals (meters) measured on the GCPs used in geometric precision correction in the across-track direction.
   

Grid Cell Size Panchromatic

• Field Definition:  Grid cell size (meters) used in creating the image for the panchromatic band.
   

Grid Cell Size Reflective

• Field Definition:  Grid cell size (meters) used in creating the image for the reflective band.
   

Grid Cell Size Thermal

• Field Definition:  Grid cell size (meters) used in creating the image for the thermal band.
   

Ground Control Points Model

• Field Definition:  The number of ground control points used in the verification of the terrain corrected product.

               Values:
               -1 to 1615
               -1 = Not calculated or assessed
 

Ground Control Points Version

• Field Definition:  The version number of the ground control points used in the verification of the terrain corrected product.

               Values:
               -1, 1, 2, 3, etc.
               -1 = Not calculated or assessed

Image Quality

• Field Definition:  The composite image quality for the scene. If the scene is OLI or OLI_TIRS combined, the value will reflect OLI quality score. The TIRS quality score will be used for TIRS.

               Values:
               9 = Best
               0 = Worst
               -1 = Image quality not calculated or assessed
 

Land Cloud Cover

• Field Definition:  Land Cloud Cover is the percentage of land image data that is obscured by clouds.

                Values:
                0.00 through 100.00 percent where -1 = Cloud Cover not calculated or assessed.
 

Landsat Product Identifier

• Field Definition:  The naming convention of each L8 OLI/TIRS Collection 1 Level-1 image is based on acquisition and processing parameters.

               Format:
               LXSS_LLLL_PPPRRR_YYYYMMDD_yyyymmdd_CC_TX

               L = Landsat
               X = Sensor (O = Operational Land Imager, T = Thermal Infrared Sensor, C = Combined OLI/TIRS)
               SS = Satellite (08 = Landsat 8)
               LLLL = Processing Correction Level (L1TP = precision and terrain, L1GT = systematic terrain, L1GS = systematic)
               PPP = WRS Path
               RRR = WRS Row
               YYYYMMDD = Acquisition Date expressed in Year, Month, Day
               yyyymmdd = Processing Date expressed in Year, Month, Day
               CC = Collection Number (01)
               TX = Collection Category (RT = Real Time, T1 = Tier 1, T2 = Tier 2)

               Example: LC08_L1TP_073090_20160910_20161105_01_T1
 

Landsat Scene Identifier

• Field Definition:  The Pre-Collection naming convention of each L8 image is based on acquisition parameters. This was the naming convention used prior to Collection 1.

               Format:
               LXSPPPRRRYYYYDDDGSIVV

               L = Landsat
               X = Sensor (O = Operational Land Imager, T = Thermal Infrared Sensor, C = Combined OLI/TIRS)
               S = Satellite (08 = Landsat 8)
               PPP = WRS Path
               RRR = WRS Row
               YYYY = Year of Acquisition
               DDD = Julian Day of Acquisition
               GSI = Ground Station Identifier
               VV = Version

               Example: LC80730902016254LGN00
 

Map Projection Level-1

• Field Definition:  The method used to represent the 3-dimensional surface of the earth for the Level-1 product.

               Values:
               PS = Polar Stereographic
               UTM = Universal Transverse Mercator
 

Nadir/Off Nadir

• Field Definition:  The viewing geometry of the satellite during data acquisition is indicated by Nadir (straight down) or Off Nadir (sideways looking).
   

Orientation

• Field Definition:  Orientation used in creating the image.

               Values:
               NOMINAL = Nominal Path
               NORTH_UP = North Up
               TRUE_NORTH = True North
               USER = User
 

Output Format

• Field Definition:  Data format available for download.

               Values:
               GEOTIFF = Geostationary Earth Orbit Tagged Image File Format
 

Panchromatic Lines

• Field Definition:  Number of product lines for the panchromatic band (Band 8).
   

Panchromatic Samples

• Field Definition:  Number of product samples for the panchromatic band (Band 8).
   

Processing Software Version

• Field Definition:  Name and version of the processing software used to generate the Level-1 product.
   

Reflective Lines

• Field Definition:  Number of product lines for the reflective bands.
   

Reflective Samples

• Field Definition:  Number of product samples for the reflective bands.
   

Resampling Option

• Field Definition:  Resampling option used in creating the image.

               Values:
               NEAREST_NEIGHBOR = Nearest Neighbor
               CUBIC_CONVOLUTION = Cubic Convolution
               MODULATION_TRANSFER_FUNCTION = Modulation Transfer Function
               BILINEAR = Bilinear
               KAISER DAMPED = Kaiser Damped
               16_POINT_SINC = 16-point sinc (sin(x)/(x)
               8_POINT_SINC = 8-point sinc (sin(x)/(x)
               DAMPED_WINDOW = Damped Window
 

RLUT File Name

• Field Definition:  The name of the Response Linearization Look Up Tables (RLUT) file containing a mapping look up table to linearize the output of the OLI detectors.
   

Roll Angle

• Field Definition:  The amount of spacecraft roll at scene center. Positive roll is to the port side of the spacecraft and the negative roll is to the starboard side. A non-zero value indicates an Off Nadir acquisition.

               Values:
               -90.000 through +90.000
 

Scene Cloud Cover

• Field Definition:  Scene Cloud Cover is the percentage of the scene that is obscured by clouds.

               Values:
               0.00 through 100.00 percent where -1 = Cloud Cover not calculated or assessed.
 

Sensor Identifier

• Field Definition:  The sensor used to capture the Landsat 8 data.

               Values:
               OLI = Operational Land Imager
               TIRS = Thermal Infrared Sensor
               OLI_TIRS = Operational Land Imager/Thermal Infrared Sensor
 

Start Time

• Field Definition:  Acquisition year, Julian day and GMT spacecraft start time of either the first major frame of the interval or the start of a WRS scene

               Values:
               YYYY:DDD:HH:MI:SS.SSSSSSS
               YYYY = Four digit year
               DDD = Julian day of year
               HH = Hour (00-23)
               MI = Minute
               SS.SSSSSSS = Fractional seconds
 

Station Identifier

• Field Definition:  The Station Identifier is the original ground receiving station to which the data was downlinked from the Landsat satellite. The list below is specific to the Landsat 8 ground stations that are currently populated in the USGS EROS database. A complete list of Landsat ground stations can be found at https://lta.cr.usgs.gov/LGSID.

Values:

ASA = Alice Springs, Australia

BJC = Beijing, China

BKT = Bangkok, Thailand

COA = Cordoba, Argentina

CUB = Cuiaba, Brazil

DKI = Parepare, Indonesia

GLC = Gilmore Creek, Alaska, USA

JSA = Hartebeesthoek, South Africa

KHC = KaShi, China

KIS = Kiruna, Sweden

KUJ = Kumamoto, Japan

LBG = Libreville, Gabon

LGN = Landsat Ground Network

LGS = Sioux Falls, SD, USA

MTI = Matera, Italy

NSG = Neustrelitz, Germany

PAC = Prince Albert, Canada

RPI = Rumpin, Indonesia

SGI = Shadnagar, India

SGS = Svalbard, Norway

SNC = SanYa, China

SRT = Si Racha, Thailand

ULK = Ulsan, South Korea

Stop Time

• Field Definition:  Acquisition year, Julian day, and GMT spacecraft stop time of either the last major frame of the interval or the stop of a WRS scene.

Values:

YYYY:DDD:HH:MI:SS.SSSSSSS

YYYY = Four digit year

DDD = Julian day of year

HH = Hour (00-23)

MI = Minute

SS.SSSSSSS = Fractional seconds

Sun Azimuth

• Field Definition:  Sun azimuth angle (degrees) at the WRS scene center. A positive value (+) indicates angles to the East or clockwise from North. Zero indicates North. A negative value (-) indicates angles to the West or counterclockwise from North.

Values:

-180.0000000 through +180.0000000 degrees

Sun Elevation

• Field Definition:  Sun elevation angle (degrees) at the WRS scene center. A positive value (+) indicates a daytime scene. Zero indicates a nighttime scene. A negative value (-) indicates a nighttime scene.

Values:

- 90.0000000 through + 90.0000000 degrees

Target WRS Path

• Field Definition:  Nearest WRS path to the Line-Of-Sight scene center. This is used primarily for scenes with off-nadir look angles. The center of scene for off-nadir imaging may be several paths left or right of the orbital path and the center may even be off the WRS-2 grid when near the poles. This is an estimated value, for reference.

Values:

001 - 251

Target WRS Row

• Field Definition:  Nearest WRS Row to the Line-Of-Sight scene center. This is used primarily for scenes with off-nadir look angles. The center of scene for off-nadir imaging may be several paths left or right of the orbital path and the center may even be off the WRS-2 grid when near the poles. This is an estimated value, for reference.

Values:

001-059 = Northern Hemisphere (Descending)

060 = Equator (Descending)

061-119 = Southern Hemisphere (Descending)

120-122 = Southern Polar Zone (Descending)

123-183 = Southern Hemisphere (Ascending)

184 = Equator (Ascending)

185-246 = Northern Hemisphere (Ascending)

247-248 = Northern Polar Zone (Descending)

 

For acquisitions near the poles, it is possible to look off-nadir toward the pole, into an area not defined by the WRS-2 grid (above 82.61 degrees). To allow unique Target Row assignments, the North Pole area is assigned a row of 88n, and the South Pole area is assigned a row of 99n, where n is a sequential number. Up to seven scenes can be covered in these areas; therefore, the scenes are assigned row numbers 880 to 886, or 990 to 996.

Thermal Lines

• Field Definition:  Number of product lines for the thermal bands.

Thermal Samples

• Field Definition:  Number of product samples for the thermal bands.

TIRS SSM Model

• Field Definition:  SDue to an anomalous condition on the Thermal Infrared Sensor (TIRS) Scene Select Mirror (SSM) encoder electronics, this field has been added to indicate which model was used to process the data.

Values:

Actual = The actual measured SSM position determined from the SSM encoder telemetry was used to process the TIRS data. This is the best TIRS quality available.

 

Preliminary = Initial estimated SSM position information was used to process the data and reprocessing will occur once SSM encoder telemetry are available.

 

Final = The TIRS data was reprocessed with updated SSM encoder telemetry.

UTM Zone

• Field Definition:  The UTM (Universal Transverse Mercator) zone used to project the location of the scene. A negative zone indicates that the false northing needs to be applied to the northing coordinate and a positive zone indicates that the false northing has been applied.

WRS Path

• Field Definition:  Worldwide Reference System (WRS)-defined nominal Landsat satellite track (path).

Values:

001 - 233

WRS Row

• Field Definition:  Worldwide Reference System (WRS)-defined nominal Landsat satellite row.

Values:

001 - 248