Detailed Description

This filter reprojects wind direction, and/or wind speed components, between PROJ supported coordinate systems.

The filter reprojects the wind direction and/or the U and V wind speed components defined by a PROJ supported coordinate system. For example, when the source coordinate system is WGS84, U and V components indicate flow along latitudes and longitudes, respectively. After using this filter to reproject to for example EPSG:3031 (Antarctic Polar Stereographic), U and V components will be directed along easting and northing, respectively.

The following arguments are supported:

COORDPARAM_SRC: provides the source coordinate system for the transformation. Provide EPSG code or a filename with a projection string. Leave empty, or use "4326" to specify WGS84.
COORDPARAM: provides the target coordinate system for the transformation. Provide EPSG code or a filename with a projection string. Leave empty, or use "4326" to specify WGS84.

Note

If both DW and wind speed components are present and defined, all three variables will be recalculated, even when the filter is only set to act on wind direction or wind speed components. This ensures consistency.
When applying the filter on wind speed components, the filter needs to be specified for only one component (the other one is automatically recalculated, to maintain consistency).
Wind speed components should be called U, VW_U or WIND_U for east/west and V, VW_V or WIND_V for north/south, respectively.
At the North and South Pole, the transform is undefined. In the limit towards the pole (|latitude| > 89.999), the transform becomes inaccurate.

Author: Nander Wever

Date: 2020-06-10

Example using wind direction, with source coordinate system described in the file racmo2.prj:

DW::filter1                     = TRANSFORMWINDVECTOR
DW::arg1::COORDPARAM_SRC        = racmo2.prj    ; file contains: "-m 57.295779506 +proj=ob_tran +o_proj=latlon +o_lat_p=-161.0 +lon_0=193.0"
DW::arg1::COORDPARAM            = 3031          ; Antarctic Polar Stereographic

Example using wind speed components:

U::filter1                      = TRANSFORMWINDVECTOR
U::arg1::COORDPARAM_SRC         = 4326          ; WGS84
U::arg1::COORDPARAM             = 21781         ; CH1903 / LV03 -- Swiss CH1903 / LV03

#include <ProcTransformWindVector.h>

Public Member Functions
	ProcTransformWindVector (const std::vector< std::pair< std::string, std::string > > &vecArgs, const std::string &name, const Config &cfg)

	~ProcTransformWindVector ()

	ProcTransformWindVector (const ProcTransformWindVector &c)

ProcTransformWindVector &	operator= (const ProcTransformWindVector &c)

virtual void	process (const unsigned int &param, const std::vector< MeteoData > &ivec, std::vector< MeteoData > &ovec)

Public Member Functions inherited from mio::ProcessingBlock
virtual	~ProcessingBlock ()

virtual void	process (const unsigned int &param, const std::vector< MeteoData > &ivec, std::vector< MeteoData > &ovec)=0

virtual void	process (Date &dateStart, Date &dateEnd)

std::string	getName () const

const ProcessingProperties &	getProperties () const

const std::string	toString () const

bool	skipStation (const std::string &station_id) const
	Should the provided station be skipped in the processing? More...

bool	noStationsRestrictions () const

const std::vector< DateRange >	getTimeRestrictions () const

Additional Inherited Members
Static Public Member Functions inherited from mio::ProcessingBlock
static void	readCorrections (const std::string &filter, const std::string &filename, std::vector< double > &X, std::vector< double > &Y)
	Read a data file structured as X Y value on each lines. More...

static void	readCorrections (const std::string &filter, const std::string &filename, std::vector< double > &X, std::vector< double > &Y1, std::vector< double > &Y2)
	Read a data file structured as X Y1 Y2 value on each lines. More...

static std::vector< double >	readCorrections (const std::string &filter, const std::string &filename, const size_t &col_idx, const char &c_type, const double &init)
	Read a correction file applicable to repeating time period. More...

static std::vector< offset_spec >	readCorrections (const std::string &filter, const std::string &filename, const double &TZ, const size_t &col_idx=2)
	Read a correction file, ie a file structured as timestamps followed by values on each lines. More...

static std::map< std::string, std::vector< DateRange > >	readDates (const std::string &filter, const std::string &filename, const double &TZ)
	Read a list of date ranges by stationIDs from a file. More...

Protected Member Functions inherited from mio::ProcessingBlock
	ProcessingBlock (const std::vector< std::pair< std::string, std::string > > &vecArgs, const std::string &name, const Config &cfg)
	protected constructor only to be called by children More...

Static Protected Member Functions inherited from mio::ProcessingBlock
static void	extract_dbl_vector (const unsigned int &param, const std::vector< MeteoData > &ivec, std::vector< double > &ovec)

static void	extract_dbl_vector (const unsigned int &param, const std::vector< const MeteoData * > &ivec, std::vector< double > &ovec)

Protected Attributes inherited from mio::ProcessingBlock
const std::set< std::string >	excluded_stations

const std::set< std::string >	kept_stations

const std::vector< DateRange >	time_restrictions

ProcessingProperties	properties

const std::string	block_name

Static Protected Attributes inherited from mio::ProcessingBlock
static const double	soil_albedo = .23

static const double	snow_albedo = .85

static const double	snow_thresh = .1
	parametrize the albedo from HS More...

Constructor & Destructor Documentation

◆ ProcTransformWindVector() [1/2]

mio::ProcTransformWindVector::ProcTransformWindVector	(	const std::vector< std::pair< std::string, std::string > > &	vecArgs,
		const std::string &	name,
		const Config &	cfg
	)

◆ ~ProcTransformWindVector()

mio::ProcTransformWindVector::~ProcTransformWindVector ( )

◆ ProcTransformWindVector() [2/2]

mio::ProcTransformWindVector::ProcTransformWindVector ( const ProcTransformWindVector & c )

Member Function Documentation

◆ operator=()

ProcTransformWindVector & mio::ProcTransformWindVector::operator= ( const ProcTransformWindVector & c )

◆ process()

void mio::ProcTransformWindVector::process	(	const unsigned int &	param,
		const std::vector< MeteoData > &	ivec,
		std::vector< MeteoData > &	ovec
	)

virtual

Implements mio::ProcessingBlock.

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