interpIDW: Interpolate values at points to a GRaster using...
In adamlilith/fasterRaster: Faster Raster and Spatial Vector Processing Using 'GRASS GIS'

interpIDW,GVector,GRaster-method

R Documentation

Interpolate values at points to a GRaster using inverse-distance weighting

This function interpolates values from a set of points to a raster using inverse distance weighting (IDW).

## S4 method for signature 'GVector,GRaster'
interpIDW(x, y, field, nPoints = Inf, power = 2)

`x`	A "points" `GVector`.
`y`	A `GRaster` to serve as a template for interpolation: Only points in `x` that fall inside the extent of the raster will be used for interpolation. You can increase the extent of a `GRaster` using `extend()`.
`field`	Character, integer, or numeric integer: Name or index of the column in `x` with values to interpolate. If `NULL` and if `x` is a 3-dimensional "points" `GVector`, then the interpolation will act on the z-coordinate of each point.
`nPoints`	Integer or numeric integer: Number of nearest points to use for interpolation. The default is to use all points (`Inf`).
`power`	Numeric value > 0: Power to which to take distance when interpolating. The default value is two, so the value of each point used for interpolation is `1 / d^2` where d is distance.

A GRaster.