coords_point_translate_wkt: Parse coordinates into well-known formats

In wkutils: Utilities for Well-Known Geometry Vectors

Parse coordinates into well-known formats

Description

These functions provide the reverse function of wkt_coords() and company: they parse vectors of coordinate values into well-known formats. Polygon rings are automatically closed, as closed rings are assumed or required by many parsers.

Usage

coords_point_translate_wkt(x, y, z = NA, m = NA, precision = 16, trim = TRUE)

coords_point_translate_wkb(
  x,
  y,
  z = NA,
  m = NA,
  endian = wk::wk_platform_endian(),
  buffer_size = 2048
)

coords_linestring_translate_wkt(
  x,
  y,
  z = NA,
  m = NA,
  feature_id = 1L,
  precision = 16,
  trim = TRUE
)

coords_linestring_translate_wkb(
  x,
  y,
  z = NA,
  m = NA,
  feature_id = 1L,
  endian = wk::wk_platform_endian(),
  buffer_size = 2048
)

coords_polygon_translate_wkt(
  x,
  y,
  z = NA,
  m = NA,
  feature_id = 1L,
  ring_id = 1L,
  precision = 16,
  trim = TRUE
)

coords_polygon_translate_wkb(
  x,
  y,
  z = NA,
  m = NA,
  feature_id = 1L,
  ring_id = 1L,
  endian = wk::wk_platform_endian(),
  buffer_size = 2048
)

Arguments

x, y, z, m	Vectors of coordinate values
precision	The rounding precision to use when writing (number of decimal places).
trim	Trim unnecessary zeroes in the output?
endian	Force the endian of the resulting WKB.
buffer_size	The buffer size to use when converting to WKB.
feature_id, ring_id	Vectors for which a change in sequential values indicates a new feature or ring. Use factor() to convert from a character vector.

Value

*_translate_wkt() returns a character vector of well-known text; *_translate_wkb() returns a list of raw vectors.

Examples

coords_point_translate_wkt(1:3, 2:4)
coords_linestring_translate_wkt(1:5, 2:6, feature_id = c(1, 1, 1, 2, 2))
coords_polygon_translate_wkt(c(0, 10, 0), c(0, 0, 10))

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