Global Land Survey Data Dictionary

 

Acquisition Date

• Field Definition:  The date the image was acquired.

          Format:

          YYYY/MM/DD

 

Browse Availability

• Field Definition:  This flag identifies whether or not the entity has a browse image available. A browse image provides the user with a visual overview of an inventory item. The browse image is a subsampled raster image.
  Not available for GLS1975 and GLS1990 TM.

          Values:

          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 – access EarthExplorer.

 

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

 

Datum

• Field Definition:  The datum associated with the image.

          Values:

          WGS 84 = World Geodetic System 1984

 

Entity ID

• Field Definition:  This field uniquely identifies the individual landsat scene.

          Values:

          Example of GLS1975 Entity ID: P029R030_5X19901005

          Format:

          PpppRrrrsXyyyymmdd

          P = WRS Path Number; next three characters

          ppp = WRS Path number

          R = WRS Row Number; next three characters

          rrr = WRS Row number

          s = Satellite number

          X = reserved space for future use

          yyyy = Year of acquisition

          mm = Month of acquisition

         dd = Day of acquisition

 

 

         Example of GLS1990 Entity ID: P029R030_5X19901005

         Format:

         PpppRrrrsXyyyymmdd

         P = WRS Path Number; next three characters

         ppp = WRS Path number

         R = WRS Row Number; next three characters

         rrr = WRS Row number

         s = Satellite number

         X = reserved space for future use

         yyyy = Year of acquisition

         mm = Month of acquisition

         dd = Day of acquisition

 

         Example of GLS2000 ETM+ Entity ID: P029R030_7X20001005

         Format:

         PpppRrrrsXyyyymmdd

 

         P = WRS Path Number; next three characters

         ppp = WRS Path number

         R = WRS Row Number; next three characters

         rrr = WRS Row number

         s = Satellite number

         X = reserved space for future use

         yyyy = Year of acquisition

         mm = Month of acquisition

         dd = Day of acquisition

 

         Example of GLS2005 Landsat 7 ETM+ and Landsat 5 TM Entity ID: LE71770512006259ASN00

         Format: LE7PPPRRRYYYYDDDRRR00

         L = Landsat

         E = ETM+

         7 = Satellite number

         PPP = Path (WRS-2)

         RRR = Row (WRS-2)

         YYYY = Four digit-year of acquisition

         DDD = Julian date of acquisition

         ASN = *Receiving Station

         00 = Version number reflecting how many times the scene was processed (0=first time processed, 1= scene reprocessed, etc.)

 

          *AAA = Data held by EROS, North American receiving site unknown

          ASA = Data held by EROS, Receiving station, Alice Springs, Australia

          ASN = Data held by EROS, Receiving station, Alice Springs, Australia

          FUI = Data held by EROS, Receiving station, Fucino, Italy (Historical)

          GLC = Data held by EROS, Receiving station, Gilmore Creek, AK, US

          HOA = Data held by EROS, Receiving station, Hobart, Australia

          KIS = Data held by EROS, Receiving station, Kiruna, Sweden

          MTI = Data held by EROS, Receiving station, Matera, Italy

          EDC = Data held by EROS, Receiving station unknown

          PAC = Data held by EROS, Receiving station, Prince Albert, Canada

          GNC = Data held by EROS, Receiving station, Gatineau, Canada

          LGS = Data held by EROS, Landsat 5 data acquired by EROS beginning July 1, 2001

          MOR = Data held by EROS, Receiving station, Moscow, Russia

          MLK = Data held by EROS, Receiving station, Malinda, Kenya

          IKR = Data held by EROS, Receiving station, Irkutsk, Russia

          CHM = Data held by EROS, Receiving station, Chetumal, Mexico

          XXO = Data held by EROS, Receiving station unknown

          XXX = Data held by EROS, Receiving station unknown

 

          Example of GLS2005 Islands Earth Observing 1 (EO-1) Advanced Land Imagery (ALI) Entity ID: 

               EO1A2060982006179110PX_SGS_01

          Format:

          EO1SPPPRRRYYYYDDDXXXML_GGG_VV

          EO1 = Satellite

          S = Sensor (H=Hyperion A=ALI)

          PPP = Target WRS path

          RRR = Target WRS row

          YYYY = Year of acquisition

          DDD = Julian day of acquisition

          X (0=off; 1=on) Hyperion

          X (0=off; 1=on) ALI

          X (0=off; 1=on) AC

          M = Pointing mode*

          L = Scene length**

          GGG = Ground/Receiving Station

          VV = Version Number

 

          *Pointing mode

          N = Nadir

          P = Pointed within path/row

          K = Pointed outside path/row

 

          **Scene length

          F = Full scene

          P = Partial scene

          Q = Second partial scene

          S = Swath

          0 - 9 = Special modes 0 - 9

          Remainder of alphabet are EDC collects

 

          Example of GLS2010 Landsat 7 ETM+ and Landsat 5 TM Entity ID: LE71760252010159MOR00

          Format:

          LE7PPPRRRYYYYDDDRRR00

          L = Landsat

          E = ETM+

          7 = Satellite number

          PPP = Path (WRS-2)

          RRR = Row (WRS-2)

          YYYY = Four digit-year of acquisition

          DDD = Julian date of acquisition

          MOR = *Receiving Station

          00 = Version number reflecting how many times the scene was processed (0=first time processed, 1= scene reprocessed, etc.)

 

          *AAA = Data held by EROS, North American receiving site unknown

          ASA = Data held by EROS, Receiving station, Alice Springs, Australia

          ASN = Data held by EROS, Receiving station, Alice Springs, Australia

          FUI = Data held by EROS, Receiving station, Fucino, Italy (Historical)

          GLC = Data held by EROS, Receiving station, Gilmore Creek, AK, US

          HOA = Data held by EROS, Receiving station, Hobart, Australia

          KIS = Data held by EROS, Receiving station, Kiruna, Sweden

          MTI = Data held by EROS, Receiving station, Matera, Italy

          EDC = Data held by EROS, Receiving station unknown

          PAC = Data held by EROS, Receiving station, Prince Albert, Canada

          GNC = Data held by EROS, Receiving station, Gatineau, Canada

          LGS = Data held by EROS, Landsat 5 data acquired by EROS beginning July 1, 2001

          MOR = Data held by EROS, Receiving station, Moscow, Russia

          MLK = Data held by EROS, Receiving station, Malinda, Kenya

          IKR = Data held by EROS, Receiving station, Irkutsk, Russia

          CHM = Data held by EROS, Receiving station, Chetumal, Mexico

          XXO = Data held by EROS, Receiving station unknown

          XXX = Data held by EROS, Receiving station unknown

 

          Example of GLS2010 Islands Earth Observing 1 (EO-1) Advanced Land Imagery (ALI) Entity ID:

                EO1A2060982006179110PX_SGS_01

          Format:

          EO1SPPPRRRYYYYDDDXXXML_GGG_VV

          EO1 = Satellite

          S = Sensor (H=Hyperion A=ALI)

          PPP = Target WRS path

          RRR = Target WRS row

          YYYY = Year of acquisition

          DDD = Julian day of acquisition

          X (0=off; 1=on) Hyperion

          X (0=off; 1=on) ALI

          X (0=off; 1=on) AC

          M = Pointing mode*

          L = Scene length**

          GGG = Ground/Receiving Station

          VV = Version Number

 

          *Pointing mode

          N = Nadir

          P = Pointed within path/row

          K = Pointed outside path/row

 

          **Scene length

          F = Full scene

          P = Partial scene

          Q = Second partial scene

          S = Swath

          0 - 9 = Special modes 0 - 9

          Remainder of alphabet are EDC collects

 

File Size

• Field Definition:  The file size of the working copy or compressed data files.

 

Gap Fill Acquisition Date

• Field Definition:  Acquisition date of input scenes used for scan gap fill - up to five input scenes - included only for gap-filled products. Applies to GLS2005 and GLS2010 - Landsat 7 ETM+ and Landsat 5 TM.

 

Gap Fill Percent

• Field Definition:  Percentage of image pixels present after gap-filling. Applies to GLS2005 and GLS2010 - Landsat 7 ETM+ and Landsat 5 TM.

 

Orientation

• Field Definition:  The orientation of the image.

          Values:

          NUP (North Up)

 

Product Type

• Field Definition:  The product type, processing level, of the image.

 

QA Percent Missing Data

• Field Definition:  Estimated percentage of scene missing or unusable.

          Values:

          0 - 100

 

Registration Acquisition Date

• Field Definition:  Acquisition date of scene used for registration - one scene only - included only for gap-filled products. Applies to GLS2005 and GLS2010 - Landsat 7 ETM+ and Landsat 5 TM.

 

Resampling Technique

• Field Definition:  The resampling applied to the scene.

           Values:

           CC = Cubic Convolution

           NN = Nearest Neighbor

 

Satellite

• Field Definition:  The satellite which acquired the data.

          Values:

          Landsat 5

          Landsat 7

          ALI

          EO1

 

Scene Size

• Field Definition:  The size of all files associated with the scene.

 

Sensor ID

• Field Definition:  The sensor that acquired this data.

 

Sun Azimuth

• Field Definition:  The Sun azimuth angle at the "true" WRS scene center. Azimuth is the angle of horizontal deviation, measured clockwise from the north.

          Values:

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

          NOTE: A positive value (+) indicates angles to the East or clockwise from North; a negative value (-) indicates angles to the 

          West or counter clockwise from North.

 

Sun Elevation

• Field Definition:  The Sun elevation angle at the "true" WRS scene center. Elevation is the angle of vertical deviation from the tangent to the earth's surface (at scene center point) to the line between the sun's center and the scene center point. NOTE: The solar zenith angle will be 90 degrees minus the solar elevation angle.

           Values:

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

 

Time Series

• Field Definition:  A sequence of regularly obtained observations collected over a specific period of time to assist in measuring change of the land surface.

 

WRS Path

• Field Definition:  The WRS-2 Path number associated with the scene.

          Values:

          001 through 233

 

WRS Row

• Field Definition:  The WRS-2 Row number associated with the scene.

          Values:

          001 through 244

 

WRS Type

• Field Definition:  Worldwide Reference System type 1 or 2

 

Zone Number

• Field Definition:  The UTM zone number associated with the image.