Ths function flattens nested geometries (i.e., multi or
geometrycollection types) into a vector with the same or fewer levels of
nesting. See geos_geometry_n() to access individual geometries within a
collection; see wk::wk_flatten() for a version of this function that
works with non-GEOS geometries; see geos_make_collection() and
wk::wk_collection() for functions that perform the inverse operation.
geos_unnest(geom, keep_empty = FALSE, keep_multi = TRUE, max_depth = 1)If TRUE, EMPTY geomtries are left as-is rather than
collapsing to length 0.
If TRUE, MULTI* geometries are not expanded to
sub-features (i.e., only GEOMETRYCOLLECTIONs are).
The maximum recursive GEOMETRYCOLLECTION depth to unnest.
A GEOS geometry vector, with a length
greater than or equal to geom with an attribute "lengths"
that can be used to map elements of the result to the
original item.
geos_unnest("GEOMETRYCOLLECTION (POINT (1 2), POINT (3 4))")
#> <geos_geometry[2]>
#> [1] <POINT (1 2)> <POINT (3 4)>