sf: sf_project – R documentation

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sf_project

directly transform a set of coordinates

Description

directly transform a set of coordinates

Usage

sf_add_proj_units()

sf_project(
  from = character(0),
  to = character(0),
  pts,
  keep = FALSE,
  warn = TRUE,
  authority_compliant = st_axis_order()
)

Arguments

`from`	character description of source CRS, or object of class `crs`, or pipeline describing a transformation
`to`	character description of target CRS, or object of class `crs`
`pts`	two-column numeric matrix, or object that can be coerced into a matrix
`keep`	logical value controlling the handling of unprojectable points. If 'keep' is 'TRUE', then such points will yield 'Inf' or '-Inf' in the return value; otherwise an error is reported and nothing is returned.
`warn`	logical; if `TRUE`, warn when non-finite values are generated
`authority_compliant`	logical; `TRUE` means handle axis order authority compliant (e.g. EPSG:4326 implying x=lat, y=lon), `FALSE` means use visualisation order (i.e. always x=lon, y=lat)

Details

sf_add_proj_units loads the PROJ units 'link', 'us_in', 'ind_yd', 'ind_ft', and 'ind_ch' into the udunits database, and returns TRUE invisibly on success.

Value

two-column numeric matrix with transformed/converted coordinates, returning invalid values as Inf

sf

Simple Features for R

v0.9-8

GPL-2 | MIT + file LICENSE

Authors

Edzer Pebesma [aut, cre] (<https://orcid.org/0000-0001-8049-7069>), Roger Bivand [ctb] (<https://orcid.org/0000-0003-2392-6140>), Etienne Racine [ctb], Michael Sumner [ctb], Ian Cook [ctb], Tim Keitt [ctb], Robin Lovelace [ctb], Hadley Wickham [ctb], Jeroen Ooms [ctb] (<https://orcid.org/0000-0002-4035-0289>), Kirill Müller [ctb], Thomas Lin Pedersen [ctb], Dan Baston [ctb]

Initial release