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Create raster mask based on coordinates

extrap_mask.Rd

Creates a raster that can be used to mask areas falling outside the observation range of a dataset, as defined by coordinates and corresponding raster values

Usage

extrap_mask(coords, envlayers, method = "range", nsd = 2, buffer_width = NULL)

range_mask(coords, envlayers)

sd_mask(coords, envlayers, nsd)

buffer_mask(coords, envlayers, buffer_width = 0.8)

chull_mask(coords, envlayers, buffer_width = NULL)

Arguments

coords

data frame of coordinates (first column should be x and second should be y)

envlayers

SpatRaster or Raster* object with environmental values to base mask on

method

method to create mask (can be "range", "sd", "buffer", defaults to "range"). See details for more information.

nsd

number of standard deviations to use if using the "sd" method

buffer_width

buffer width to supply to gBuffer if using "buffer" method

Value

SpatRaster where values of 1 indicate areas that fall outside of observation range

Details

method can either be:

  1. range - uses range_mask, mask all areas with values outside of the range of any of the values of the coords

  2. sd - uses sd_mask, mask all areas outside the mean +/- stdev*nsd of any of the values of the coords (nsd defaults to 2)

  3. buffer - uses buffer_mask, mask all areas outside of the buffer_width around the coords (buffer_width defaults to 0.8)

  4. chull - uses chull_mask, mask all areas outside a convex hull of the points

Functions

  • range_mask(): mask based on range of data

  • sd_mask(): mask based on mean and standard deviation of data

  • buffer_mask(): mask based on buffers around points

  • chull_mask(): mask based on range of data