gdalgrid.h File Reference

GDAL gridder related entry points and definitions. More...

#include "gdal_alg.h"

Go to the source code of this file.

Typedefs
typedef CPLErr(*	GDALGridFunction) (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)

Functions
CPLErr	GDALGridInverseDistanceToAPower (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridInverseDistanceToAPowerNoSearch (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridMovingAverage (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridNearestNeighbor (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
	Nearest neighbor. More...
CPLErr	GDALGridDataMetricMinimum (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridDataMetricMaximum (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridDataMetricRange (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridDataMetricCount (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridDataMetricAverageDistance (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	GDALGridDataMetricAverageDistancePts (const void *, GUInt32, const double *, const double *, const double *, double, double, double *, void *)
CPLErr	ParseAlgorithmAndOptions (const char *, GDALGridAlgorithm *, void **)

Detailed Description

GDAL gridder related entry points and definitions.

Function Documentation

CPLErr GDALGridNearestNeighbor	(	const void *	poOptions,
		GUInt32	nPoints,
		const double *	padfX,
		const double *	padfY,
		const double *	padfZ,
		double	dfXPoint,
		double	dfYPoint,
		double *	pdfValue,
		void *	hExtraParamsIn
	)

Nearest neighbor.

The Nearest Neighbor method doesn't perform any interpolation or smoothing, it just takes the value of nearest point found in grid node search ellipse and returns it as a result. If there are no points found, the specified NODATA value will be returned.

Parameters

poOptions	Algorithm parameters. This should point to GDALGridNearestNeighborOptions object.
nPoints	Number of elements in input arrays.
padfX	Input array of X coordinates.
padfY	Input array of Y coordinates.
padfZ	Input array of Z values.
dfXPoint	X coordinate of the point to compute.
dfYPoint	Y coordinate of the point to compute.
pdfValue	Pointer to variable where the computed grid node value will be returned.

Returns

CE_None on success or CE_Failure if something goes wrong.