annulus_window: Creates annulus focal window

In MultiscaleDTM: Multi-Scale Geomorphometric Terrain Attributes

Creates annulus focal window

Description

Creates annulus focal window around central pixel.

Usage

annulus_window(radius, unit, resolution)

Arguments

radius	radius of inner annulus c(inner,outer). Inner radius must be less than or equal to outer radius.
unit	unit for radius. Either "cell" (number of cells, the default) or "map" for map units (e.g. meters).
resolution	resolution of intended raster layer (one number or a vector of length 2). Only necessary if unit= "map"

Value

a matrix of 1's and NA's showing which cells to include and exclude respectively in focal calculations. It also contains attributes attributes 'unit', 'scale', and 'shape'.

MultiscaleDTM documentation built on April 4, 2025, 5:17 a.m.