Download MNHN vector layers for a Sequoia project

Downloads one or several vector layers from the IGN WFS service for mnhn layer(s) of a Sequoia project.

Usage

seq_mnhn(
  dirname = ".",
  buffer = 500,
  key = get_keys("mnhn"),
  verbose = TRUE,
  overwrite = FALSE
)

Arguments

dirname

character Directory where the matrice file is located. Defaults to the current working directory.

buffer

numeric; Buffer around x (in meters) used to enlarge the download area.

key

character; List of MNHN layer identifiers to download. If not provided, the function uses get_keys("mnhn") to automatically select all MNHN layers defined in the Sequoia configuration (inst/config/seq_layers.yaml)

verbose

logical; If TRUE, display messages.

overwrite

logical If TRUE, file is overwritten.

Value

A named list of file paths written by seq_write(), one per layer.

Details

This function is a convenience wrapper looping over get_mnhn(), allowing the user to download all products in one call and automatically write them to the project directory using seq_write().

For each value in key, the function attempts to query the corresponding MNHN layer using get_mnhn().

• If the layer contains features, it is written to the project directory via seq_write() and recorded as a successful download.

• If the layer contains no features, it is skipped and marked as empty.

See also

get_mnhn(), seq_write()