ucar.grib.grib2

Class Grib2DataRepresentationSection

java.lang.Object

ucar.grib.grib2.Grib2DataRepresentationSection

public final class Grib2DataRepresentationSection
extends Object

A class that represents the DataRepresentationSection of a GRIB product. These are the variables needed by the Data Section class

Constructor Summary

Constructors

Constructor and Description
Grib2DataRepresentationSection(RandomAccessFile raf) Constructs a Grib2DataRepresentationSection object from a raf.

Method Summary

Methods

Modifier and Type	Method and Description
int	getBinaryScaleFactor() Binary scale factor (E).
int	getBitsGroupWidths() Number of bits used for the group widths (after the reference value in octet 36 has been removed).
int	getBitsScaledGroupLength() Number of bits used for the scaled group lengths (after subtraction of the reference value given in octets 38-41 and division by the length increment given in octet 42).
int	getCompressionMethod() Type compression method used (see Code Table 5.40000).
int	getCompressionRatio() Compression ratio used .
int	getDataPoints() Get the number of dataPoints in DS section.
int	getDataTemplateNumber() Get the Data Template Number for the GRID.
int	getDecimalScaleFactor() Decimal scale factor (D).
int	getDescriptorSpatial() Number of octets required in the Data Section to specify extra descriptors needed for spatial differencing (octets 6-ww in Data Template 7.3).
int	getLength() Get the byte length of the Section DRS section.
int	getLengthIncrement() Length increment for the group lengths (see Note 14).
int	getLengthLastGroup() Length increment for the group lengths (see Note 14).
int	getMissingValueManagement() Missing value management used (see Code Table 5.5).
int	getNumberOfBits() Number of bits used for each packed value..
int	getNumberOfGroups() NG - Number of groups of data values into which field is split.
int	getOrderSpatial() Order of spatial differencing (see Code Table 5.6).
int	getOriginalType() Type of original field values.
float	getPrimaryMissingValue() Primary missing value substitute.
int	getReferenceGroupLength() Reference for group lengths (see Note 13).
int	getReferenceGroupWidths() Reference for group widths (see Note 12).
float	getReferenceValue() Reference value (R) (IEEE 32-bit floating-point value).
float	getSecondaryMissingValue() Secondary missing value substitute.
int	getSplittingMethod() Group splitting method used (see Code Table 5.4).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Grib2DataRepresentationSection

public Grib2DataRepresentationSection(RandomAccessFile raf)
                               throws IOException

Constructs a Grib2DataRepresentationSection object from a raf.

Parameters:

raf - RandomAccessFile with Section DRS content

Throws:

IOException - if stream contains no valid GRIB file

Method Detail

getLength

public final int getLength()

Get the byte length of the Section DRS section.

Returns:

length in bytes of Section DRS section

getDataPoints

public final int getDataPoints()

Get the number of dataPoints in DS section.

Returns:

number of dataPoints in DS section

getDataTemplateNumber

public final int getDataTemplateNumber()

Get the Data Template Number for the GRID.

Returns:

Data Template Number

getReferenceValue

public final float getReferenceValue()

Reference value (R) (IEEE 32-bit floating-point value).

Returns:

ReferenceValue

getBinaryScaleFactor

public final int getBinaryScaleFactor()

Binary scale factor (E).

Returns:

BinaryScaleFactor

getDecimalScaleFactor

public final int getDecimalScaleFactor()

Decimal scale factor (D).

Returns:

DecimalScaleFactor

getNumberOfBits

public final int getNumberOfBits()

Number of bits used for each packed value..

Returns:

NumberOfBits NB

getOriginalType

public final int getOriginalType()

Type of original field values.

Returns:

OriginalType dataType

getSplittingMethod

public final int getSplittingMethod()

Group splitting method used (see Code Table 5.4).

Returns:

SplittingMethod

getCompressionMethod

public final int getCompressionMethod()

Type compression method used (see Code Table 5.40000).

Returns:

CompressionMethod

getCompressionRatio

public final int getCompressionRatio()

Compression ratio used .

Returns:

CompressionRatio

getMissingValueManagement

public final int getMissingValueManagement()

Missing value management used (see Code Table 5.5).

Returns:

MissingValueManagement

getPrimaryMissingValue

public final float getPrimaryMissingValue()

Primary missing value substitute.

Returns:

PrimaryMissingValue

getSecondaryMissingValue

public final float getSecondaryMissingValue()

Secondary missing value substitute.

Returns:

SecondaryMissingValue

getNumberOfGroups

public final int getNumberOfGroups()

NG - Number of groups of data values into which field is split.

Returns:

NumberOfGroups NG

getReferenceGroupWidths

public final int getReferenceGroupWidths()

Reference for group widths (see Note 12).

Returns:

ReferenceGroupWidths

getBitsGroupWidths

public final int getBitsGroupWidths()

Number of bits used for the group widths (after the reference value in octet 36 has been removed).

Returns:

BitsGroupWidths

getReferenceGroupLength

public final int getReferenceGroupLength()

Reference for group lengths (see Note 13).

Returns:

ReferenceGroupLength

getLengthIncrement

public final int getLengthIncrement()

Length increment for the group lengths (see Note 14).

Returns:

LengthIncrement

getLengthLastGroup

public final int getLengthLastGroup()

Length increment for the group lengths (see Note 14).

Returns:

LengthLastGroup

getBitsScaledGroupLength

public final int getBitsScaledGroupLength()

Number of bits used for the scaled group lengths (after subtraction of the reference value given in octets 38-41 and division by the length increment given in octet 42).

Returns:

BitsScaledGroupLength

getOrderSpatial

public final int getOrderSpatial()

Order of spatial differencing (see Code Table 5.6).

Returns:

OrderSpatial

getDescriptorSpatial

public final int getDescriptorSpatial()

Number of octets required in the Data Section to specify extra descriptors needed for spatial differencing (octets 6-ww in Data Template 7.3).

Returns:

DescriptorSpatial