Flatten nested geometry structures

wkt_unnest(wkt, keep_empty = FALSE, keep_multi = TRUE, max_depth = 1)

wkb_unnest(wkb, keep_empty = FALSE, keep_multi = TRUE, max_depth = 1)

Arguments

wkt: A character vector containing well-known text.
keep_empty: If TRUE, a GEOMETRYCOLLECTION EMPTY is left as-is rather than collapsing to length 0.
keep_multi: If TRUE, MULTI* geometries are not expanded to sub-features.
max_depth: The maximum recursive GEOMETRYCOLLECTION depth to unnest.
wkb: A list() of raw() vectors, such as that returned by sf::st_as_binary().

Value

An unclassed vector with attribute lengths, which is an integer vector with the same length as the input denoting the length to which each feature was expanded.

Examples

wkt_unnest("GEOMETRYCOLLECTION (POINT (1 2), POINT (3 4))")
#> [1] "POINT (1 2)" "POINT (3 4)"
#> attr(,"lengths")
#> [1] 2
wkt_unnest("GEOMETRYCOLLECTION EMPTY")
#> character(0)
#> attr(,"lengths")
#> [1] 0
wkt_unnest("GEOMETRYCOLLECTION EMPTY", keep_empty = TRUE)
#> [1] "GEOMETRYCOLLECTION EMPTY"
#> attr(,"lengths")
#> [1] 1