computeTEW.SpatRaster: Compute the topographic exposure to wind

In StormR: Analyzing the Behaviour of Wind Generated by Tropical Storms and Cyclones

Compute the topographic exposure to wind

Description

The computeTEW() function allows computing topographic exposure to wind (TEW) for each cell of a raster grid for a tropical cyclone or set of tropical cyclones.

Usage

## S3 method for class 'SpatRaster'
computeTEW(
  profiles,
  sts,
  dtm,
  angle = 6,
  threshold = 0,
  product = "TEWIntegrated",
  verbose = 2,
  ...
)

Arguments

profiles	SpatRaster. Wind speed and direction profiles from spatialBehaviour() function which must respect the following terminology : 'STORM_Speed_N', 'STORM_Direction_N'
sts	StormsList object
dtm	SpatRaster of the elevation data (Digital Terrain Model) for a given location
angle	numeric. Inflection angle of the wind (in degrees). default is 6°.
threshold	numeric. Minimum wind speed threshold (in m/s) requirred to compute exposure. default is 0
product	character vector. Desired output statistics: "TEW1wd", TEW computation at each observation, one wind direction taken where wind speed is maximal. Good if your loi is small as wind is considered spatially homogeneous "TEW1wdMax", computes "TEW1wd", then takes the maximum of the layers "TEW1wdMean", computes "TEW1wd", then takes the mean of the layers "TEW", TEW computation at each observation, wind direction varies spatially "TEWIntegrated", TEW computation for maximum wind speed over the whole storm track for each spatial location of the raster. Use wind direction associated with the maximal wind speed (default)
verbose	numeric. Whether or not the function should display information about the process and/or outputs. Can be: 2, information about the processes and outputs are displayed (default setting), 1, information about the processes are displayed, 0, no information displayed.
...	additional arguments (not used)

Value

the function returns one layer for topographic exposure to wind (TEW) for each observation or interpolated observation and each Storm. The names of the layer follow the following terminology, the name of the storm in capital letters, "TEW", and the indices of the observation separated by underscores (e.g., "PAM_TEW_41", ...)

StormR documentation built on July 15, 2026, 5:08 p.m.