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Merge polygons (or polygon files) to form a single minimum convex polygon (mcp)

Source: R/make_predict_boundary.R
make_predict_boundary.Rd

Primary use is to create a predict boundary for prep_sdm(), merging (an existing) minimum convex polygon around points with other sources of taxa distribution. Optionally, applying a buffer around the resulting mcp; and clipping to a (usually coastal) boundary. The predict boundary is then used for generation of background points and for masking the 'full' predict (to the full extent of the environmental variables.

Usage

make_predict_boundary(
  poly_list,
  out_file,
  buffer_metres = 0,
  col_name = "taxa",
  col_name_val = "boundary",
  clip = NULL,
  out_crs,
  return_poly = FALSE,
  force_new = FALSE
)

Arguments

poly_list

List of paths or list of sf

out_file

Character name of file to save

buffer_metres

Numeric. Distance in metres to buffer the mcp

col_name

Name of column to create in the resulting mcp

col_name_val

Value to provide in the column in the resulting mcp

clip

sf. Clip the resulting mcp back to this.

out_crs

Numeric. epsg code

return_poly

Logical. Return the mcp, or alternatively out_file

force_new

Logical. If out_file exists, recreate it?

Value

If return_poly, sf, else out_file. .parquet mcp written to out_file