directly transform a set of coordinates
sf_add_proj_units()sf_project(
from = character(0),
to = character(0),
pts,
keep = FALSE,
warn = TRUE,
authority_compliant = st_axis_order()
)
two-column numeric matrix with transformed/converted coordinates, returning invalid values as Inf
character description of source CRS, or object of class crs,
or pipeline describing a transformation
character description of target CRS, or object of class crs
two-, three- or four-column numeric matrix, or object that can be coerced into a matrix; columns 3 and 4 contain z and t values.
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.
logical; if TRUE, warn when non-finite values are generated
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)
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.