When writing transformation functions, it is often useful to know which
handler should be used to create a (potentially modified) version
of an object. Some transformers (e.g., wk_vertices()) modify
the geometry type of an object, in which case a generic writer is needed.
This defaults to wkb_writer() because it is fast and can handle
all geometry types.
# S3 method for sfc
wk_writer(handleable, ...)
# S3 method for sf
wk_writer(handleable, ...)
sfc_writer(promote_multi = FALSE)
wkb_writer(buffer_size = 2048L, endian = NA_integer_)
wkt_writer(precision = 16L, trim = TRUE)
wk_writer(handleable, ..., generic = FALSE)
# S3 method for default
wk_writer(handleable, ...)
# S3 method for wk_wkt
wk_writer(handleable, ..., precision = 16, trim = TRUE)
# S3 method for wk_wkb
wk_writer(handleable, ...)
# S3 method for wk_xy
wk_writer(handleable, ..., generic = FALSE)
xy_writer()A geometry vector (e.g., wkb(), wkt(), xy(),
rct(), or sf::st_sfc()) for which wk_handle() is defined.
Passed to the writer constructor.
Use TRUE to promote all simple geometries to a multi type when reading to sfc. This is useful to increase the likelihood that the sfc will contain a single geometry type.
Control the initial buffer size used when writing WKB.
Use 1 for little endian, 0 for big endian, or NA for system endian.
If trim is TRUE, the total number of significant digits to keep
for each result or the number of digits after the decimal place otherwise.
Use FALSE to keep trailing zeroes after the decimal place.
Use TRUE to obtain a writer that can write all geometry
types.
A wk_handler.