Represents a meteorological data grid from a GRIB (Gridded Binary) file. More...

#include <GribRecord.h>

Inheritance diagram for GribRecord:

Public Member Functions
	GribRecord (const GribRecord &rec)
	Copy constructor performs a deep copy of the GribRecord.

void	multiplyAllData (double k)

void	Substract (const GribRecord &rec, bool positive=true)

void	Average (const GribRecord &rec)

bool	isOk () const

bool	isDataKnown () const

bool	isEof () const

bool	isDuplicated () const

zuchar	getDataType () const
	Returns the type of meteorological parameter stored in this grid.

void	setDataType (const zuchar t)

zuchar	getLevelType () const
	Returns the type of vertical level for this grid's data.

zuint	getLevelValue () const
	Returns the numeric value associated with the level type.

zuint	getDataCenterModel () const
	Returns the numerical weather prediction model/center that produced this data.

zuchar	getIdCenter () const
	Returns the originating center ID as defined by WMO (World Meteorological Organization).

zuchar	getIdModel () const
	Returns the model/process ID within the originating center.

zuchar	getIdGrid () const
	Returns the grid definition template number.

std::string	getKey () const

int	getPeriodP1 () const
	Returns the start of the period (P1) used for this record.

int	getPeriodP2 () const
	Returns the end of the period (P2) used for this record.

zuint	getPeriodSec () const
	Returns the forecast period in seconds from reference time.

zuchar	getTimeRange () const
	Returns the time range indicator that defines how P1 and P2 should be interpreted.

int	getNi () const
	Returns the number of points in the longitude (i) direction of the grid.

int	getNj () const
	Returns the number of points in the latitude (j) direction of the grid.

double	getDi () const
	Returns the grid spacing in longitude (i) direction in degrees.

double	getDj () const
	Returns the grid spacing in latitude (j) direction in degrees.

double	getValue (int i, int j) const
	Returns the data value at a specific grid point.

void	setValue (zuint i, zuint j, double v)

double	getInterpolatedValue (double px, double py, bool numericalInterpolation=true, bool dir=false) const
	Get spatially interpolated value at exact lat/lon position.

double	getX (int i) const
	Converts grid index i to longitude in degrees.

double	getY (int j) const
	Converts grid index j to latitude in degrees.

void	getXY (int i, int j, double x, double y) const
	Converts grid indices to longitude/latitude coordinates.

double	getLatMin () const

double	getLonMin () const

double	getLatMax () const

double	getLonMax () const

bool	hasValue (int i, int j) const

bool	isDefined (int i, int j) const

time_t	getRecordRefDate () const

const char *	getStrRecordRefDate () const

time_t	getRecordCurrentDate () const

const char *	getStrRecordCurDate () const

void	setRecordCurrentDate (time_t t)

void	print ()

bool	isFilled ()

void	setFilled (bool val=true)

Static Public Member Functions
static GribRecord *	InterpolatedRecord (const GribRecord &rec1, const GribRecord &rec2, double d, bool dir=false)
	Creates a new GribRecord by temporally interpolating between two time points.

static GribRecord *	Interpolated2DRecord (GribRecord *&rety, const GribRecord &rec1x, const GribRecord &rec1y, const GribRecord &rec2x, const GribRecord &rec2y, double d)
	Creates temporally interpolated records for vector fields (wind, currents).

static GribRecord *	MagnitudeRecord (const GribRecord &rec1, const GribRecord &rec2)

static void	Polar2UV (GribRecord pDIR, GribRecord pSPEED)
	Converts wind or current values from polar (direction/speed) to cartesian (U/V) components.

static std::string	makeKey (int dataType, int levelType, int levelValue)

static bool	getInterpolatedValues (double &M, double &A, const GribRecord GRX, const GribRecord GRY, double px, double py, bool numericalInterpolation=true)
	Gets spatially interpolated wind or current vector values at a specific latitude/longitude point.

Protected Member Functions
time_t	makeDate (zuint year, zuint month, zuint day, zuint hour, zuint min, zuint sec)

Static Protected Member Functions
static bool	GetInterpolatedParameters (const GribRecord &rec1, const GribRecord &rec2, double &La1, double &Lo1, double &La2, double &Lo2, double &Di, double &Dj, int &im1, int &jm1, int &im2, int &jm2, int &Ni, int &Nj, int &rec1offi, int &rec1offj, int &rec2offi, int &rec2offj)

Protected Attributes
int	id
	Unique identifier for this record.

bool	ok
	Indicates record validity.

bool	knownData
	Indicates whether the data type in this record is recognized by the parser.

bool	waveData
	Differentiates wave-related parameters (height, direction, period) from other meteorological data for specialized processing.

bool	IsDuplicated
	Indicates if this record was created through copying rather than direct reading.

bool	eof
	Signals when the end of the GRIB file has been reached during parsing.

std::string	dataKey
	Unique string identifier constructed from data type, level type, and level value.

char	strRefDate [32]

char	strCurDate [32]

int	dataCenterModel
	Identifies the numerical weather model that produced this data.

bool	m_bfilled
	Indicates whether the data array has been populated.

zuchar	editionNumber
	GRIB edition number, indicating the version of the GRIB specification used.

zuchar	idCenter
	Originating center ID as defined by WMO common table C-1.

zuchar	idModel
	Model identifier within the originating center.

zuchar	idGrid
	Grid identifier used by the originating center.

zuchar	dataType
	Parameter identifier as defined by GRIB tables.

zuchar	levelType
	Vertical level type indicator.

zuint	levelValue
	Numeric value associated with levelType.

bool	hasBMS
	Indicates presence of a bitmap section.

zuint	refyear
	Components of the reference time for this forecast.

zuint	refmonth

zuint	refday

zuint	refhour

zuint	refminute

zuint	periodP1
	Time range indicators for this forecast step.

zuint	periodP2

zuchar	timeRange
	Statistical processing indicator.

zuint	periodsec
	Forecast period in seconds.

time_t	refDate
	Unix timestamp of model initialization time.

time_t	curDate
	Unix timestamp of when this forecast is valid.

zuchar	NV

zuchar	PV

zuchar	gridType

zuint	Ni

zuint	Nj

double	La1

double	Lo1
	Grid origin coordinates.

double	La2

double	Lo2
	Grid end coordinates.

double	latMin

double	lonMin

double	latMax

double	lonMax

double	Di

double	Dj

zuchar	resolFlags

zuchar	scanFlags

bool	hasDiDj

bool	isEarthSpheric

bool	isUeastVnorth

bool	isScanIpositive

bool	isScanJpositive

bool	isAdjacentI

zuint	BMSsize

zuchar *	BMSbits

double *	data

Detailed Description

Represents a meteorological data grid from a GRIB (Gridded Binary) file.

A GribRecord contains a regular latitude/longitude grid of values representing a single meteorological parameter (e.g., wind component, pressure, temperature) at a specific:

Time (forecast or analysis time)
Vertical level (e.g., surface, pressure level, height above ground)
Parameter type (defined by GRIB edition and originating center)

Grid Structure:

Origin point (La1, Lo1) and end point (La2, Lo2)
Number of points in each direction (Ni, Nj)
Grid spacing (Di, Dj)
Data array of size Ni × Nj containing values at each grid point

Features:

Provides spatial interpolation for points between grid points.
Handles vector fields (e.g., wind, currents) with special interpolation for magnitude and direction.
Supports bitmap sections for irregular data coverage.
Can be created from file data or generated through temporal/spatial interpolation.
Derived quantities like wind speed from U/V components.
Unit conversions and statistical calculations.

Definition at line 182 of file GribRecord.h.

Constructor & Destructor Documentation

◆ GribRecord() [1/2]

GribRecord::GribRecord ( const GribRecord & rec )

Copy constructor performs a deep copy of the GribRecord.

Definition at line 58 of file GribRecord.cpp.

◆ GribRecord() [2/2]

GribRecord::GribRecord ( )

inline

Definition at line 186 of file GribRecord.h.

◆ ~GribRecord()

GribRecord::~GribRecord ( )

virtual

Definition at line 441 of file GribRecord.cpp.

Member Function Documentation

◆ Average()

void GribRecord::Average ( const GribRecord & rec )

Definition at line 390 of file GribRecord.cpp.

◆ getDataCenterModel()

zuint GribRecord::getDataCenterModel ( ) const

inline

Returns the numerical weather prediction model/center that produced this data.

Known data centers and models include:

NOAA_GFS: NOAA Global Forecast System
NOAA_NCEP_WW3: NOAA NCEP Wave Watch III model
NOAA_RTOFS: NOAA Real-Time Ocean Forecast System
FNMOC_WW3_GLB: US Navy FNMOC global Wave Watch III
ECMWF_ERA5: European ECMWF ERA5 reanalysis
KNMI_HIRLAM: Netherlands KNMI HIRLAM model
OTHER_DATA_CENTER: Other/unknown sources

Returns: Identifier for the data source model as defined in DataCenterModel enum

Note: Different centers may use different parameters, units, grid structures, and update frequencies

Definition at line 348 of file GribRecord.h.

◆ getDataType()

zuchar GribRecord::getDataType ( ) const

inline

Returns the type of meteorological parameter stored in this grid.

Standard meteorological parameters are defined as constants, including:

GRB_PRESSURE (2): Atmospheric pressure in Pa
GRB_TEMP (11): Temperature in K
GRB_WIND_VX (33): West-East wind component in m/s
GRB_WIND_VY (34): South-North wind component in m/s
GRB_HUMID_REL (52): Relative humidity in %
GRB_PRECIP_TOT (61): Total precipitation in l/m2
GRB_CLOUD_TOT (71): Total cloud cover in %

Returns: Parameter type identifier as unsigned char

See also: The full list of parameter codes is defined at the top of GribRecord.h

Note: Parameter definitions can vary between GRIB1 and GRIB2 formats

Definition at line 298 of file GribRecord.h.

◆ getDi()

double GribRecord::getDi ( ) const

inline

Returns the grid spacing in longitude (i) direction in degrees.

Returns: Grid spacing in degrees longitude

Definition at line 460 of file GribRecord.h.

◆ getDj()

double GribRecord::getDj ( ) const

inline

Returns the grid spacing in latitude (j) direction in degrees.

Returns: Grid spacing in degrees latitude

Note: Can be negative if grid runs from north to south

Definition at line 467 of file GribRecord.h.

◆ getIdCenter()

zuchar GribRecord::getIdCenter ( ) const

inline

Returns the originating center ID as defined by WMO (World Meteorological Organization).

Standard center IDs include:

7: US National Weather Service (NWS)
34: Japanese Meteorological Agency (JMA)
58: European Centre for Medium-Range Weather Forecasts (ECMWF)
59: German Weather Service (DWD)
85: French Weather Service (Météo-France)

Returns: Center identification code as defined in GRIB Table 0

Definition at line 364 of file GribRecord.h.

◆ getIdGrid()

zuchar GribRecord::getIdGrid ( ) const

inline

Returns the grid definition template number.

Identifies how the grid coordinates are defined, including:

Projection type (latitude/longitude, polar stereographic, etc.)
Grid point layout and scanning mode
Earth shape assumptions

Returns: Grid definition identifier as defined in GRIB specifications

Definition at line 387 of file GribRecord.h.

◆ getIdModel()

zuchar GribRecord::getIdModel ( ) const

inline

Returns the model/process ID within the originating center.

Each center can run multiple forecast models or analysis processes. This ID distinguishes between them (e.g., global vs. regional models). The meaning depends on the center ID.

Returns: Model/process identification number specific to the originating center

See also: getIdCenter()

Definition at line 376 of file GribRecord.h.

◆ GetInterpolatedParameters()

bool GribRecord::GetInterpolatedParameters	(	const GribRecord &	rec1,
		const GribRecord &	rec2,
		double &	La1,
		double &	Lo1,
		double &	La2,
		double &	Lo2,
		double &	Di,
		double &	Dj,
		int &	im1,
		int &	jm1,
		int &	im2,
		int &	jm2,
		int &	Ni,
		int &	Nj,
		int &	rec1offi,
		int &	rec1offj,
		int &	rec2offi,
		int &	rec2offj
	)

staticprotected

Definition at line 74 of file GribRecord.cpp.

◆ getInterpolatedValue()

double GribRecord::getInterpolatedValue	(	double	px,
		double	py,
		bool	numericalInterpolation = `true`,
		bool	dir = `false`
	)		const

Get spatially interpolated value at exact lat/lon position.

This method performs specialized vector interpolation for meteorological vector fields like wind or ocean currents.

Parameters

px	Longitude in degrees.
py	Latitude in degrees.
numericalInterpolation	Use bilinear interpolation if true.
dir	Handle directional interpolation if true (e.g. for wind direction).

Returns: Spatially interpolated value or GRIB_NOTDEF if outside grid.

Definition at line 519 of file GribRecord.cpp.

◆ getInterpolatedValues()

bool GribRecord::getInterpolatedValues	(	double &	M,
		double &	A,
		const GribRecord *	GRX,
		const GribRecord *	GRY,
		double	px,
		double	py,
		bool	numericalInterpolation = `true`
	)

static

Gets spatially interpolated wind or current vector values at a specific latitude/longitude point.

Takes X and Y component records and interpolates both magnitude and angle using bilinear interpolation between grid points.

Parameters

M	[out] Vector magnitude at the interpolated point (preserves input units). This is the speed or strength of the wind/current, typically measured in meters per second (m/s).
A	[out] Vector direction in meteorological degrees at the interpolated point. This is the direction the wind/current is coming FROM, measured in meteorological degrees (0 = North, 90 = East).
GRX	X-component record of the vector field (u-component, West-East)
GRY	Y-component record of the vector field (v-component, South-North)
px	[in] Longitude in degrees of the interpolation point.
py	[in] Latitude in degrees of the interpolation point.
numericalInterpolation	If true, uses bilinear interpolation; if false, uses nearest neighbor interpolation.

Note: The method expects the input components to follow meteorological conventions where u is positive eastward and v is positive northward

Definition at line 650 of file GribRecord.cpp.

◆ getKey()

std::string GribRecord::getKey ( ) const

inline

Definition at line 390 of file GribRecord.h.

◆ getLatMax()

double GribRecord::getLatMax ( ) const

inline

Definition at line 569 of file GribRecord.h.

◆ getLatMin()

double GribRecord::getLatMin ( ) const

inline

Definition at line 567 of file GribRecord.h.

◆ getLevelType()

zuchar GribRecord::getLevelType ( ) const

inline

Returns the type of vertical level for this grid's data.

Level types define the vertical coordinate system, including:

LV_GND_SURF (1): Ground or water surface
LV_ISOBARIC (100): Constant pressure surface (e.g. 850 hPa)
LV_MSL (102): Mean sea level
LV_ABOV_GND (105): Height above ground
LV_ABOV_MSL (103): Height above mean sea level

Returns: Level type identifier as unsigned char

See also: levelValue() for the specific value within this level type

Definition at line 315 of file GribRecord.h.

◆ getLevelValue()

zuint GribRecord::getLevelValue ( ) const

inline

Returns the numeric value associated with the level type.

The meaning of this value depends on getLevelType():

For LV_ISOBARIC: Pressure in hectoPascals (e.g., 850 for 850 hPa)
For LV_ABOV_GND/LV_ABOV_MSL: Height in meters
For LV_GND_SURF/LV_MSL: Value is typically 0

Returns: Level value as unsigned int

See also: getLevelType() to determine how to interpret this value

Definition at line 328 of file GribRecord.h.

◆ getLonMax()

double GribRecord::getLonMax ( ) const

inline

Definition at line 570 of file GribRecord.h.

◆ getLonMin()

double GribRecord::getLonMin ( ) const

inline

Definition at line 568 of file GribRecord.h.

◆ getNi()

int GribRecord::getNi ( ) const

inline

Returns the number of points in the longitude (i) direction of the grid.

Returns: Number of grid points along longitude

Definition at line 448 of file GribRecord.h.

◆ getNj()

int GribRecord::getNj ( ) const

inline

Returns the number of points in the latitude (j) direction of the grid.

Returns: Number of grid points along latitude

Definition at line 454 of file GribRecord.h.

◆ getPeriodP1()

int GribRecord::getPeriodP1 ( ) const

inline

Returns the start of the period (P1) used for this record.

The meaning depends on the time range indicator (getTimeRange()):

For forecasts: Hours after reference time.
For accumulations: Start of accumulation period.
For averages: Start of averaging period.

Returns: Period start indicator in units determined by time range.

See also: getTimeRange()

Definition at line 405 of file GribRecord.h.

◆ getPeriodP2()

int GribRecord::getPeriodP2 ( ) const

inline

Returns the end of the period (P2) used for this record.

The meaning depends on the time range indicator (getTimeRange()):

For forecasts: Usually same as P1
For accumulations: End of accumulation period
For averages: End of averaging period

Returns: Period end indicator in units determined by time range

See also: getTimeRange()

Definition at line 417 of file GribRecord.h.

◆ getPeriodSec()

zuint GribRecord::getPeriodSec ( ) const

inline

Returns the forecast period in seconds from reference time.

This is the time offset from the model reference time (analysis time) when this data is valid.

Returns: Time offset in seconds from reference time.

See also: getRecordRefDate()

Definition at line 427 of file GribRecord.h.

◆ getRecordCurrentDate()

time_t GribRecord::getRecordCurrentDate ( ) const

inline

Definition at line 584 of file GribRecord.h.

◆ getRecordRefDate()

time_t GribRecord::getRecordRefDate ( ) const

inline

Definition at line 580 of file GribRecord.h.

◆ getStrRecordCurDate()

const char * GribRecord::getStrRecordCurDate ( ) const

inline

Definition at line 585 of file GribRecord.h.

◆ getStrRecordRefDate()

const char * GribRecord::getStrRecordRefDate ( ) const

inline

Definition at line 581 of file GribRecord.h.

◆ getTimeRange()

zuchar GribRecord::getTimeRange ( ) const

inline

Returns the time range indicator that defines how P1 and P2 should be interpreted.

Common values include:

0: Product valid at reference time + P1
1: Product valid for reference time + P1 to reference time + P2
2: Product averaged from reference time + P1 to reference time + P2
4: Product accumulated from reference time + P1 to reference time + P2

Returns: Time range indicator as defined in GRIB specifications

Definition at line 440 of file GribRecord.h.

◆ getValue()

double GribRecord::getValue	(	int	i,
		int	j
	)		const

inline

Returns the data value at a specific grid point.

The grid is stored as a one-dimensional array in row-major order (longitude varies fastest).

Parameters

i	Index in longitude direction (0 to Ni-1)
j	Index in latitude direction (0 to Nj-1)

Returns: Data value at grid point (i,j)

Note: No bounds checking is performed

Definition at line 480 of file GribRecord.h.

◆ getX()

double GribRecord::getX ( int i ) const

inline

Converts grid index i to longitude in degrees.

Uses the grid's origin (Lo1) and spacing (Di) to convert from grid index to geographic coordinate.

Parameters

i	Grid index in longitude direction (0 to Ni-1)

Returns: Longitude in degrees

Definition at line 540 of file GribRecord.h.

◆ getXY()

void GribRecord::getXY	(	int	i,
		int	j,
		double *	x,
		double *	y
	)		const

inline

Converts grid indices to longitude/latitude coordinates.

Convenience method that performs both X and Y conversions.

Parameters

	i	Grid index in longitude direction
	j	Grid index in latitude direction
[out]	x	Pointer to store longitude in degrees
[out]	y	Pointer to store latitude in degrees

Definition at line 562 of file GribRecord.h.

◆ getY()

double GribRecord::getY ( int j ) const

inline

Converts grid index j to latitude in degrees.

Uses the grid's origin (La1) and spacing (Dj) to convert from grid index to geographic coordinate.

Parameters

j	Grid index in latitude direction (0 to Nj-1)

Returns: Latitude in degrees

Note: Returns decreasing latitudes when Dj is negative

Definition at line 551 of file GribRecord.h.

◆ hasValue()

bool GribRecord::hasValue	(	int	i,
		int	j
	)		const

inline

Definition at line 776 of file GribRecord.h.

◆ Interpolated2DRecord()

GribRecord * GribRecord::Interpolated2DRecord	(	GribRecord *&	rety,
		const GribRecord &	rec1x,
		const GribRecord &	rec1y,
		const GribRecord &	rec2x,
		const GribRecord &	rec2y,
		double	d
	)

static

Creates temporally interpolated records for vector fields (wind, currents).

Unlike scalar interpolation, vector fields require both X and Y components to be interpolated together to preserve the vector characteristics. This method:

Converts X,Y components to magnitude and direction at each grid point/
Interpolates magnitude linearly between times.
Interpolates direction using proper angular interpolation.
Converts back to X,Y components.

Parameters

rety	[out] Pointer to store interpolated Y-component record
rec1x	X-component record at earlier time t1 (e.g., wind u-component)
rec1y	Y-component record at earlier time t1 (e.g., wind v-component)
rec2x	X-component record at later time t2
rec2y	Y-component record at later time t2
d	Interpolation factor between [0,1] where: 0 returns values from time t1 1 returns values from time t2

Returns

Pointer to interpolated X-component record, or NULL if:

Input records have mismatched grids
Any input record is invalid
Memory allocation fails

Definition at line 228 of file GribRecord.cpp.

◆ InterpolatedRecord()

GribRecord * GribRecord::InterpolatedRecord	(	const GribRecord &	rec1,
		const GribRecord &	rec2,
		double	d,
		bool	dir = `false`
	)

static

Creates a new GribRecord by temporally interpolating between two time points.

Performs linear interpolation between two GribRecords that:

Represent the same parameter (e.g., temperature, pressure).
Have the same grid structure.
Exist at different times.

The interpolation is done value-by-value across the entire grid using:

Linear interpolation for scalar values
Angular interpolation for directional values (when dir=true) to properly handle the 0°/360° wrapping

Parameters

rec1	GribRecord at earlier time t1
rec2	GribRecord at later time t2
d	Interpolation factor between [0,1] where: 0 means use values from rec1 1 means use values from rec2 0.5 means halfway between rec1 and rec2
dir	If true, treats values as angles in degrees and uses proper angular interpolation (e.g., for wind direction)

Returns

New GribRecord containing the interpolated values, or NULL if:

Input records have different grid structures
Input records are invalid
Memory allocation fails

Note: For vector fields (e.g., wind, currents), use Interpolated2DRecord() instead to properly handle both components together

Definition at line 159 of file GribRecord.cpp.

◆ isDataKnown()

bool GribRecord::isDataKnown ( ) const

inline

Definition at line 278 of file GribRecord.h.

◆ isDefined()

bool GribRecord::isDefined	(	int	i,
		int	j
	)		const

inline

Definition at line 575 of file GribRecord.h.

◆ isDuplicated()

bool GribRecord::isDuplicated ( ) const

inline

Definition at line 280 of file GribRecord.h.

◆ isEof()

bool GribRecord::isEof ( ) const

inline

Definition at line 279 of file GribRecord.h.

◆ isFilled()

bool GribRecord::isFilled ( )

inline

Definition at line 588 of file GribRecord.h.

◆ isOk()

bool GribRecord::isOk ( ) const

inline

Definition at line 277 of file GribRecord.h.

◆ MagnitudeRecord()

GribRecord * GribRecord::MagnitudeRecord	(	const GribRecord &	rec1,
		const GribRecord &	rec2
	)

static

Definition at line 313 of file GribRecord.cpp.

◆ makeDate()

time_t GribRecord::makeDate	(	zuint	year,
		zuint	month,
		zuint	day,
		zuint	hour,
		zuint	min,
		zuint	sec
	)

protected

Definition at line 488 of file GribRecord.cpp.

◆ makeKey()

std::string GribRecord::makeKey	(	int	dataType,
		int	levelType,
		int	levelValue
	)

static

Definition at line 429 of file GribRecord.cpp.

◆ multiplyAllData()

void GribRecord::multiplyAllData ( double k )

Definition at line 456 of file GribRecord.cpp.

◆ Polar2UV()

void GribRecord::Polar2UV	(	GribRecord *	pDIR,
		GribRecord *	pSPEED
	)

static

Converts wind or current values from polar (direction/speed) to cartesian (U/V) components.

U component represents East/West velocity (positive = eastward) V component represents North/South velocity (positive = northward)

Parameters

pDIR	Direction record in meteorological degrees (0 = N, 90 = E).
pSPEED	Speed record (units preserved).

Note: Modifies input records: pDIR becomes U component, pSPEED becomes V component.

Definition at line 340 of file GribRecord.cpp.

◆ print()

void GribRecord::print ( )

Definition at line 47 of file GribRecord.cpp.

◆ setDataType()

void GribRecord::setDataType ( const zuchar t )

Definition at line 424 of file GribRecord.cpp.

◆ setFilled()

void GribRecord::setFilled ( bool val = true )

inline

Definition at line 589 of file GribRecord.h.

◆ setRecordCurrentDate()

void GribRecord::setRecordCurrentDate ( time_t t )

Definition at line 469 of file GribRecord.cpp.

◆ setValue()

void GribRecord::setValue	(	zuint	i,
		zuint	j,
		double	v
	)

inline

Definition at line 482 of file GribRecord.h.

◆ Substract()

void GribRecord::Substract	(	const GribRecord &	rec,
		bool	positive = `true`
	)

Definition at line 362 of file GribRecord.cpp.

Member Data Documentation

◆ BMSbits

zuchar* GribRecord::BMSbits

protected

Definition at line 764 of file GribRecord.h.

◆ BMSsize

zuint GribRecord::BMSsize

protected

Definition at line 763 of file GribRecord.h.

◆ curDate

time_t GribRecord::curDate

protected

Unix timestamp of when this forecast is valid.

Definition at line 746 of file GribRecord.h.

◆ data

double* GribRecord::data

protected

Definition at line 766 of file GribRecord.h.

◆ dataCenterModel

int GribRecord::dataCenterModel

protected

Identifies the numerical weather model that produced this data.

Standard WMO values from GRIB2 Table C-11 include:

7: US National Weather Service, National Centers for Environmental Prediction (NCEP)
34: Japanese Meteorological Agency - Tokyo (JMA)
58: European Centre for Medium-Range Weather Forecasts (ECMWF)
59: DWD (German Weather Service)
85: French Weather Service (Meteo France)
251: Norwegian Meteorological Institute

Definition at line 663 of file GribRecord.h.

◆ dataKey

std::string GribRecord::dataKey

protected

Unique string identifier constructed from data type, level type, and level value.

Used for record lookup and comparison.

Definition at line 648 of file GribRecord.h.

◆ dataType

zuchar GribRecord::dataType

protected

Parameter identifier as defined by GRIB tables.

Specifies what physical quantity is represented (wind, temperature, etc).

Definition at line 699 of file GribRecord.h.

◆ Di

double GribRecord::Di

protected

Definition at line 754 of file GribRecord.h.

◆ Dj

double GribRecord::Dj

protected

Definition at line 754 of file GribRecord.h.

◆ editionNumber

zuchar GribRecord::editionNumber

protected

GRIB edition number, indicating the version of the GRIB specification used.

Determines how subsequent sections should be parsed.

Definition at line 677 of file GribRecord.h.

◆ eof

bool GribRecord::eof

protected

Signals when the end of the GRIB file has been reached during parsing.

Definition at line 643 of file GribRecord.h.

◆ gridType

zuchar GribRecord::gridType

protected

Definition at line 749 of file GribRecord.h.

◆ hasBMS

bool GribRecord::hasBMS

protected

Indicates presence of a bitmap section.

When true, the data section uses a bitmap to indicate valid data points.

Definition at line 716 of file GribRecord.h.

◆ hasDiDj

bool GribRecord::hasDiDj

protected

Definition at line 756 of file GribRecord.h.

◆ id

int GribRecord::id

protected

Unique identifier for this record.

Set during file reading for original records. Monotonically increasing for records read from file.

Definition at line 613 of file GribRecord.h.

◆ idCenter

zuchar GribRecord::idCenter

protected

Originating center ID as defined by WMO common table C-1.

Identifies which meteorological center generated the forecast.

Definition at line 684 of file GribRecord.h.

◆ idGrid

zuchar GribRecord::idGrid

protected

Grid identifier used by the originating center.

Specifies the coordinate system and projection of the data grid.

Definition at line 694 of file GribRecord.h.

◆ idModel

zuchar GribRecord::idModel

protected

Model identifier within the originating center.

Distinguishes between different forecast models run by the same center.

Definition at line 689 of file GribRecord.h.

◆ isAdjacentI

bool GribRecord::isAdjacentI

protected

Definition at line 761 of file GribRecord.h.

◆ IsDuplicated

bool GribRecord::IsDuplicated

protected

Indicates if this record was created through copying rather than direct reading.

Tracks whether this record was copied to maintain data continuity. This happens with wave data gaps or initial values for cumulative parameters.

Definition at line 639 of file GribRecord.h.

◆ isEarthSpheric

bool GribRecord::isEarthSpheric

protected

Definition at line 757 of file GribRecord.h.

◆ isScanIpositive

bool GribRecord::isScanIpositive

protected

Definition at line 759 of file GribRecord.h.

◆ isScanJpositive

bool GribRecord::isScanJpositive

protected

Definition at line 760 of file GribRecord.h.

◆ isUeastVnorth

bool GribRecord::isUeastVnorth

protected

Definition at line 758 of file GribRecord.h.

◆ knownData

bool GribRecord::knownData

protected

Indicates whether the data type in this record is recognized by the parser.

Used to skip unknown data types during processing.

Definition at line 626 of file GribRecord.h.

◆ La1

double GribRecord::La1

protected

Definition at line 751 of file GribRecord.h.

◆ La2

double GribRecord::La2

protected

Definition at line 752 of file GribRecord.h.

◆ latMax

double GribRecord::latMax

protected

Definition at line 753 of file GribRecord.h.

◆ latMin

double GribRecord::latMin

protected

Definition at line 753 of file GribRecord.h.

◆ levelType

zuchar GribRecord::levelType

protected

Vertical level type indicator.

Specifies the type of vertical coordinate (pressure level, height above ground, etc).

Definition at line 705 of file GribRecord.h.

◆ levelValue

zuint GribRecord::levelValue

protected

Numeric value associated with levelType.

For example, the specific pressure level in hectopascals.

Definition at line 710 of file GribRecord.h.

◆ Lo1

double GribRecord::Lo1

protected

Grid origin coordinates.

Definition at line 751 of file GribRecord.h.

◆ Lo2

double GribRecord::Lo2

protected

Grid end coordinates.

Definition at line 752 of file GribRecord.h.

◆ lonMax

double GribRecord::lonMax

protected

Definition at line 753 of file GribRecord.h.

◆ lonMin

double GribRecord::lonMin

protected

Definition at line 753 of file GribRecord.h.

◆ m_bfilled

bool GribRecord::m_bfilled

protected

Indicates whether the data array has been populated.

Used to track partial loading states during record construction.

Definition at line 668 of file GribRecord.h.

◆ Ni

zuint GribRecord::Ni

protected

Definition at line 750 of file GribRecord.h.

◆ Nj

zuint GribRecord::Nj

protected

Definition at line 750 of file GribRecord.h.

◆ NV

zuchar GribRecord::NV

protected

Definition at line 748 of file GribRecord.h.

◆ ok

bool GribRecord::ok

protected

Indicates record validity.

A record may be invalid if source records have mismatched dimensions, missing data arrays, failed interpolation, or the source records themselves are invalid when creating derived records.

Definition at line 621 of file GribRecord.h.

◆ periodP1

zuint GribRecord::periodP1

protected

Time range indicators for this forecast step.

Used to calculate the valid time period for this data.

Definition at line 727 of file GribRecord.h.

◆ periodP2

zuint GribRecord::periodP2

protected

Definition at line 727 of file GribRecord.h.

◆ periodsec

zuint GribRecord::periodsec

protected

Forecast period in seconds.

Time offset from the reference time.

Definition at line 738 of file GribRecord.h.

◆ PV

zuchar GribRecord::PV

protected

Definition at line 748 of file GribRecord.h.

◆ refDate

time_t GribRecord::refDate

protected

Unix timestamp of model initialization time.

Definition at line 742 of file GribRecord.h.

◆ refday

zuint GribRecord::refday

protected

Definition at line 721 of file GribRecord.h.

◆ refhour

zuint GribRecord::refhour

protected

Definition at line 721 of file GribRecord.h.

◆ refminute

zuint GribRecord::refminute

protected

Definition at line 721 of file GribRecord.h.

◆ refmonth

zuint GribRecord::refmonth

protected

Definition at line 721 of file GribRecord.h.

◆ refyear

zuint GribRecord::refyear

protected

Components of the reference time for this forecast.

Specifies when the forecast model was initialized.

Definition at line 721 of file GribRecord.h.

◆ resolFlags

zuchar GribRecord::resolFlags

protected

Definition at line 755 of file GribRecord.h.

◆ scanFlags

zuchar GribRecord::scanFlags

protected

Definition at line 755 of file GribRecord.h.

◆ strCurDate

char GribRecord::strCurDate[32]

protected

Definition at line 650 of file GribRecord.h.

◆ strRefDate

char GribRecord::strRefDate[32]

protected

Definition at line 649 of file GribRecord.h.

◆ timeRange

zuchar GribRecord::timeRange

protected

Statistical processing indicator.

Describes how the data was processed over time (e.g., accumulation, average).

Definition at line 733 of file GribRecord.h.

◆ waveData

bool GribRecord::waveData

protected

Differentiates wave-related parameters (height, direction, period) from other meteorological data for specialized processing.

Definition at line 631 of file GribRecord.h.

The documentation for this class was generated from the following files:

/home/runner/work/main/main/opencpn/plugins/grib_pi/src/GribRecord.h
/home/runner/work/main/main/opencpn/plugins/grib_pi/src/GribRecord.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ GribRecord() [1/2]

◆ GribRecord() [2/2]

◆ ~GribRecord()

Member Function Documentation

◆ Average()

◆ getDataCenterModel()

◆ getDataType()

◆ getDi()

◆ getDj()

◆ getIdCenter()

◆ getIdGrid()

◆ getIdModel()

◆ GetInterpolatedParameters()

◆ getInterpolatedValue()

◆ getInterpolatedValues()

◆ getKey()

◆ getLatMax()

◆ getLatMin()

◆ getLevelType()

◆ getLevelValue()

◆ getLonMax()

◆ getLonMin()

◆ getNi()

◆ getNj()

◆ getPeriodP1()

◆ getPeriodP2()

◆ getPeriodSec()

◆ getRecordCurrentDate()

◆ getRecordRefDate()

◆ getStrRecordCurDate()

◆ getStrRecordRefDate()

◆ getTimeRange()

◆ getValue()

◆ getX()

◆ getXY()

◆ getY()

◆ hasValue()

◆ Interpolated2DRecord()

◆ InterpolatedRecord()

◆ isDataKnown()

◆ isDefined()

◆ isDuplicated()

◆ isEof()

◆ isFilled()

◆ isOk()

◆ MagnitudeRecord()

◆ makeDate()

◆ makeKey()

◆ multiplyAllData()

◆ Polar2UV()

◆ print()

◆ setDataType()

◆ setFilled()

◆ setRecordCurrentDate()

◆ setValue()

◆ Substract()

Member Data Documentation

◆ BMSbits

◆ BMSsize

◆ curDate

◆ data

◆ dataCenterModel

◆ dataKey

◆ dataType

◆ Di

◆ Dj

◆ editionNumber

◆ eof

◆ gridType

◆ hasBMS

◆ hasDiDj

◆ id

◆ idCenter