projpar: Return a parameter used in a WKT projection
Description
Return the value of a parameter (the name or the unit)
present in the WKT of the given CRS.
Usage
projpar(x, par, abort = FALSE)
projname(x, abort = FALSE)
Value
A character with the content of the parameter, and an
attribute crs with the input projection checked using
sf::st_crs().
Arguments
x
The CRS to be named (any st_crs2 input is accepted).
par
Character corresponding to the parameter name
(it can be one among "name" and "unit" - case insensitive).
abort
logical: if TRUE, the function aborts in case an invalid
CRS is passed; if FALSE (default), the function returns NA,
and a warning is shown.
Author
Luigi Ranghetti, phD (2020)
References
L. Ranghetti, M. Boschetti, F. Nutini, L. Busetto (2020).
"sen2r": An R toolbox for automatically downloading and preprocessing
Sentinel-2 satellite data. Computers & Geosciences, 139, 104473.
tools:::Rd_expr_doi("10.1016/j.cageo.2020.104473"), URL: https://sen2r.ranghetti.info/.