wkb_draw_points: Draw well-known geometries

In wkutils: Utilities for Well-Known Geometry Vectors

Draw well-known geometries

Description

These functions send well-known geometry vectors to a graphics device using graphics::points(), graphics::lines(), and graphics::polypath(). These are minimal wrappers aimed at developers who need to visualize test data: they do not check geometry type and are unlikely to work with vectorized graphical parameters in .... Use the wk*_plot_new() functions to initialize a plot using the extent of all coordinates in the vector.

Usage

wkb_draw_points(wkb, ...)

wkt_draw_points(wkt, ...)

wkb_draw_lines(wkb, ...)

wkt_draw_lines(wkt, ...)

wkb_draw_polypath(wkb, ..., rule = "evenodd")

wkt_draw_polypath(wkt, ..., rule = "evenodd")

wkb_plot_new(
  wkb,
  ...,
  asp = 1,
  xlab = "",
  ylab = "",
  main = deparse(substitute(wkb))
)

wkt_plot_new(
  wkt,
  ...,
  asp = 1,
  xlab = "",
  ylab = "",
  main = deparse(substitute(wkt))
)

Arguments

wkb	A list() of raw() vectors, such as that returned by sf::st_as_binary().
...	Passed to graphics::points(), graphics::lines(), or graphics::polypath()
wkt	A character vector containing well-known text.
rule	Passed to graphics::polypath()
asp, xlab, ylab, main	Passed to graphics::plot() to initialize a new plot.

Value

The input, invisibly

Examples

x <- "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))"

wkt_plot_new(x)
wkt_draw_polypath(x, col = "grey90")
wkt_draw_lines(x, col = "red")
wkt_draw_points(x)

wkutils documentation built on Jan. 22, 2023, 1:50 a.m.