HDF-EOS MODIS Vegetation Continuous Fields File Specification

Version:     	V6.0
Revision: 0
Date:	October 31, 2011

Product Ident:	MODIS/Terra Vegetation Continuous Fields Yearly L3 Global 250m
	SIN Grid

Product Identifiers: 

Description: 	
	The MOD44B product contains global vegetation continuous fields, a global
	representation of the Earth's surface as gradations of three components of
	ground cover:  percent tree cover, percent non-tree vegetation and percent
	bare, with each of the three components expressed as a percentage of ground
	cover.

Point of Contact:
	Charlene DiMiceli
	Dept. of Geography, 1106 Lefrak Hall
	University of Maryland
	College Park, MD 20472

Name:                                Type:      Num_Val:      Value:

CoreMetadata.0                     HDF-STRING       1           	

LocalGranuleID                     STRING           1        Variable
ProductionDateTime                 DATETIME         1        Variable
DayNightFlag                       STRING           1        Variable
ReprocessingActual                 STRING           1        Variable
ReprocessingPlanned                STRING           1        Variable
AutomaticQualityFlagExplanation    STRING           1        Variable
AutomaticQualityFlag               STRING           1        Variable
OperationalQualityFlagExplanation   STRING          1        Variable
OperationalQualityFlag             STRING           1        Variable
QAPercentMissingData               INTEGER          1        Variable
QAPercentOutofBoundsData           INTEGER          1        Variable
QAPercentCloudCover                INTEGER          1        Variable
QAPercentInterpolatedData          INTEGER          1        Variable
ParameterName                      STRING           1        "MODIS/Terra Vegetation Continuous Fields Yearly L3 Global 250m SIN Grid"
EquatorCrossingDate                DATE              1        Variable
EquatorCrossingTime                TIME              1        Variable
EquatorCrossingLongitude           DOUBLE           1        Variable
OrbitNumber                        INTEGER          1        Variable
VersionID                          INTEGER          1        Variable
ShortName                          STRING           1        "MOD44B"
InputPointer                       STRING         500        Variable
GRingPointLongitude                DOUBLE           4        Variable
GRingPointLatitude                 DOUBLE           4        Variable
GRingPointSequenceNo               INTEGER          4        Variable
ExclusionGRingFlag                 STRING           1        Variable
RangeEndingDate                    DATE             1        Variable
RangeEndingTime                    TIME             1        Variable
RangeBeginningDate                 DATE             1        Variable
RangeBeginningTime                 TIME             1        Variable
PGEVersion                         STRING           1        Variable
AncillaryInputPointer              STRING           1        Variable
AncillaryInputType                 STRING           1        Variable
AssociatedSensorShortName          STRING           1        "CCD"
AssociatedPlatformShortName        STRING           1        "AM-1"
AssociatedInstrumentShortName      STRING           1        "MODIS"
AdditionalAttributeName            STRING           7	    
    ADDITIONALATTRIBUTENAME.1 = "QAPERCENTGOODQUALITY" 
    ADDITIONALATTRIBUTENAME.2 = "QAPERCENTOTHERQUALITY" 
    ADDITIONALATTRIBUTENAME.3 = "QAPERCENTNOTPRODUCEDCLOUD"
    ADDITIONALATTRIBUTENAME.4 = "QAPERCENTNOTPRODUCEDOTHER"
    ADDITIONALATTRIBUTENAME.5 = "HORIZONTALTILENUMBER" 
    ADDITIONALATTRIBUTENAME.6 = "VERTICALTILENUMBER"   
    ADDITIONALATTRIBUTENAME.7 = "TileID" 
ParameterValue                     STRING           7        Variable

ArchiveMetadata.0

WestBoundingCoordinate             DOUBLE           1        Variable
NorthBoundingCoordinate            DOUBLE           1        Variable
EastBoundingCoordinate             DOUBLE           1        Variable
SouthBoundingCoordinate            DOUBLE           1        Variable
AlgorithmPackageAcceptanceDate     STRING           1        Variable
AlgorithmPackageMaturityCode       STRING           1        Variable
AlgorithmPackageName               STRING           1        Variable
AlgorithmPackageVersion            STRING           1        Variable
LongName                           STRING           1        "MODIS/Terra Vegetation Continuous Fields Yearly L3 Global 250m SIN Grid"
LocalInputGranuleID                STRING         500        Variable

char8  StructMetadata.0 = {
      GridName = "MOD44B_250m_GRID"
        Dimensions: 
          XDim = 4800
          YDim = 4800
          ZDim = 4
      UpperLeftPointMtrs = (Varies, Varies)
      LowerRightMtrs = (Varies, Varies)
      Projection = GCTP_SINUS
      ProjParams = (6371007.181000, 0, 0, 0, 0, 0, 0, 0, 21600, 0, 1, 0, 0)
      SphereCode = -1
      GridOrigin = HDFE_GD_UL
      DataFields: type name(dimensions)
			byte Percent_Tree_Cover(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GRID)
			byte Quality(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GRID)
			short Percent_Tree_Cover_SD(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GR
ID) ;
			byte Cloud(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GRID)

----------------------------------------------------------------------
SDSs contained in this product:

byte Percent_Tree_Cover(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GRID)

Description:
	The percent tree canopy coverage contained in a pixel.  Trees are
	defined at woody vegetation greater than 5 meters tall.

	units         NA
   valid range   0-100, 200 (water)
	fill value    253 (interrupted space)


byte Cloud(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GRID)

Description:
	This is a bitfield with each bit representing 3 (2 in the case of the
	end of year) 16-day MOD44C input composites.  If the bit is 1 there was
	no cloud-free observation during the time period.  The leftmost bit
	represents the beginning of the year (years start on day 65 for this
	product).

	units          NA
	valid range    0-255
	fill value     0



byte Quality(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GRID)i

Description:
   This is a bitfield with each bit representing 3 (2 in the case of the
   end of year) 16-day MOD44C input composites.  If the bit is 1 there was 
   no good-quality observation during the time period.  The leftmost bit
   represents the beginning of the year (years start on day 65 for this
   product). Quality assessments include cloud, aerosol, and low-light
   conditions.

   units          NA
   valid range    0-255
   fill value     0



short Percent_Tree_Cover_SD(YDim_MOD44B_250m_GRID, XDim_MOD44B_250m_GRID)

Description:	
	Each Percent_Tree_Value is the mean of the predictions from 30 bagged
	regression tree models.  The values in this SDS are the standard
	deviations of these 30 predictions.  This value indicates the agreement
	between the 30 models and is an indicator of the quality of the mean
	prediction.

   units          NA
   valid range    0-MAX_SHORT
   fill value     -100  (This value indicates that the Percent_Tree_Cover
								data for this pixel was not derived from the
                        regression models, but was estimated from another
                        source; see User's Guide)


Last updated: August 26, 2019