wk (version 0.5.0)

wk_vertices: Extract vertices

Description

These functions provide ways to extract individual coordinate values. Whereas wk_vertices() returns a vector of coordinates as in the same format as the input, wk_coords() returns a data frame with coordinates as columns.

Usage

wk_vertices(handleable, ...)
wk_coords(handleable, ...)
wk_vertex_filter(handler, add_details = FALSE)

Arguments

handleable

A geometry vector (e.g., wkb(), wkt(), xy(), rct(), or sf::st_sfc()) for which wk_handle() is defined.

...

Passed to the wk_handle() method.

handler

A wk_handler object.

add_details

Use TRUE to add a "wk_details" attribute, which contains columns feature_id, part_id, and ring_id.

Value

• wk_vertices() extracts vertices and returns the in the same format as the handler

• wk_coords() returns a data frame with columns columns feature_id (the index of the feature from whence it came), part_id (an arbitrary integer identifying the point, line, or polygon from whence it came), ring_id (an arbitrary integer identifying individual rings within polygons), and one column per coordinate (x, y, and/or z and/or m).

Examples

# NOT RUN {
wk_vertices(wkt("LINESTRING (0 0, 1 1)"))
wk_coords(wkt("LINESTRING (0 0, 1 1)"))

# }