wkutils (version 0.1.3)

coords_point_translate_wkt: 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
)

Value

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

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.

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))