Handling CRS/WKT

Get and set CRS object or WKT string properties.

inla.wkt_is_geocent(wkt)

inla.crs_is_geocent(crs)

inla.wkt_get_ellipsoid_radius(wkt)

inla.crs_get_ellipsoid_radius(crs)

inla.wkt_set_ellipsoid_radius(wkt, radius)

inla.crs_set_ellipsoid_radius(crs, radius)

inla.wkt_unit_params()

inla.wkt_get_lengthunit(wkt)

inla.wkt_set_lengthunit(wkt, unit, params = NULL)

inla.crs_get_wkt(crs)

inla.crs_get_lengthunit(crs)

inla.crs_set_lengthunit(crs, unit, params = NULL)

Arguments

wkt

A WKT2 character string

crs

A sp::CRS or inla.CRS object

unit

character, name of a unit. Supported names are "metre", "kilometre", and the aliases "meter", "m", International metre", "kilometer", and "km", as defined by inla.wkt_unit_params or the params argument. (For legacy PROJ4 use, only "m" and "km" are supported)

params

Length unit definitions, in the list format produced by inla.wkt_unit_params(), Default: NULL, which invokes inla.wkt_unit_params()

Value

For inla.wkt_unit_params, a list of named unit definitions

For inla.wkt_get_lengthunit, a list of length units used in the wkt string, excluding the ellipsoid radius unit.

For inla.wkt_set_lengthunit, a WKT2 string with altered length units. Note that the length unit for the ellipsoid radius is unchanged.

For inla.crs_get_wkt, WKT2 string.

For inla.crs_get_lengthunit, a list of length units used in the wkt string, excluding the ellipsoid radius unit. (For legacy PROJ4 code, the raw units from the proj4string are returned, if present.)

For inla.crs_set_lengthunit, a sp::CRS object with altered length units. Note that the length unit for the ellipsoid radius is unchanged.

See also

inla.sp_get_crs

Author

Finn Lindgren finn.lindgren@gmail.com

Examples

if (FALSE) { # \dontrun{
if(inla.has_PROJ6()){
  c1 <- inla.CRS("globe")
  inla.crs_get_lengthunit(c1)
  c2 <- inla.crs_set_lengthunit(c1, "km")
  inla.crs_get_lengthunit(c2)
 }
} # }