Detailed Description

Inverse Distance Weighting interpolation algorithm.

Each cell receives the weighted average of the whole data set with weights being 1/r² (r being the distance of the current cell to the contributing station) and renormalized (so that the sum of the weights is equal to 1.0). It takes the following arguments:

SCALE: this is a scaling parameter to smooth the IDW distribution. In effect, this is added to the distance in order to move into the tail of the 1/d distribution (default: 1000m);
ALPHA: this is an exponent to the 1/d distribution (default: 1);

Note: If IDW is applied on wind speed (VW, VW_MAX or VW_DRIFT) or wind direction (DW), the algorithm internally applies the interpolation on the wind speed components individually, if both wind speed and direction are available at the same station.

#include <IDWAlgorithm.h>

Public Member Functions
	IDWAlgorithm (const std::vector< std::pair< std::string, std::string > > &vecArgs, const std::string &i_algo, const std::string &i_param, TimeSeriesManager &i_tsm)

virtual double	getQualityRating (const Date &i_date) override

virtual void	calculate (const DEMObject &dem, Grid2DObject &grid) override

Public Member Functions inherited from mio::InterpolationAlgorithm
	InterpolationAlgorithm (const std::vector< std::pair< std::string, std::string > > &, const std::string &i_algo, const std::string &i_param, TimeSeriesManager &i_tsm)

virtual	~InterpolationAlgorithm ()

std::string	getInfo () const
	Return an information string about the interpolation process.

Additional Inherited Members
Public Attributes inherited from mio::InterpolationAlgorithm
const std::string	algo

Protected Member Functions inherited from mio::InterpolationAlgorithm
std::vector< double >	getData (const Date &i_date, const std::string &i_param)

size_t	getData (const Date &i_date, const std::string &i_param, std::vector< double > &o_vecData, std::vector< StationData > &o_vecMeta)

Protected Attributes inherited from mio::InterpolationAlgorithm
TimeSeriesManager &	tsmanager

Date	date

std::vector< MeteoData >	vecMeteo

std::vector< double >	vecData
	store the measurement for the given parameter

std::vector< StationData >	vecMeta
	store the station data for the given parameter

std::ostringstream	info
	to store some extra information about the interplation process

const std::string	param
	the parameter that we will interpolate

size_t	nrOfMeasurments
	Number of stations that have been used, so this can be reported to the user.

Constructor & Destructor Documentation

◆ IDWAlgorithm()

mio::IDWAlgorithm::IDWAlgorithm	(	const std::vector< std::pair< std::string, std::string > > &	vecArgs,
		const std::string &	i_algo,
		const std::string &	i_param,
		TimeSeriesManager &	i_tsm
	)

Member Function Documentation

◆ calculate()

void mio::IDWAlgorithm::calculate	(	const DEMObject &	dem,
		Grid2DObject &	grid
	)

overridevirtual

Implements mio::InterpolationAlgorithm.

◆ getQualityRating()

double mio::IDWAlgorithm::getQualityRating ( const Date & i_date )