elevation: Elevation limits.

In red: IUCN Redlisting Tools

Elevation limits.

Description

Calculates the elevation (or depth) limits (range) of a species based on either known records or predicted distribution.

Usage

elevation(spData, dem = NULL)

Arguments

spData	One of three options: 1) matrix of longitude and latitude (two columns) of each occurrence record; 2) matrix of easting and northing (two columns, e.g. UTM) of each occurrence record in meters; 3) RasterLayer object of predicted distribution (0/1 values).
dem	RasterLayer object. Should be a digital elevation model (DEM) of the relevant area. If not given the function will try to read it from base data, only works with longlat data.

Details

Maximum and minimum elevation are calculated based on the DEM.

Value

A vector with two values (min and max) in meters above (or below) sea level.

Examples

records = red.examples("red.records")
range = red.examples("red.range")
layers = red.examples("red.layers")
dem = layers[[3]]
elevation(records, dem)
elevation(range, dem)

red documentation built on Sept. 9, 2023, 1:07 a.m.