setMinimumZfromRaster: Set minimum z-axis values from a raster

In mkde: 2D and 3D Movement-Based Kernel Density Estimates (MKDEs)

Set minimum z-axis values from a raster

Description

Set the lower bounds in the z-dimension for each location in the x and y dimensions from a raster.

Usage

setMinimumZfromRaster(mkde.obj, spat.raster)

Arguments

mkde.obj	A 2D or 3D MKDE object created with initialize3DMKDE or initialize3DMKDE, respectively
spat.raster	A RasterLayer object representing the lower bounds of the space the animal may occupy in the z-dimension.

Details

This function sets the lower bounds of the space the animal may occupy in the z-dimension. For example, the ascii.raster.file argument may represent a raster for elevation, depth of the sea floor, or other surface.

Value

An updated MKDE list object is returned.

Author(s)

Jeff A. Tracey, PhD
USGS Western Ecological Research Center, San Diego Field Station
[e-mail]
James Sheppard, PhD
San Diego Zoo Institute for Conservation Research
[e-mail]

Examples

library(terra)
fpath <- system.file("extdata", "dugongdem.RDS", package="mkde")
dugongdem <- terra::readRDS(fpath)
cell.sz <- mean(res(dugongdem))
ext <- ext(dugongdem)
nx <- ncol(dugongdem)
ny <- nrow(dugongdem)
mkde.obj <- initializeMKDE3D(ext$xmin, cell.sz, nx, ext$ymin, cell.sz,
ny, min(values(dugongdem), na.rm=TRUE), 50.0, 15)
mkde.obj <- setMinimumZfromRaster(mkde.obj, dugongdem-20.0)

mkde documentation built on April 3, 2025, 11:44 p.m.