Create the reference system transformed in Euler pole coordinate
Details
The PoR coordinate reference system is oblique transformation of the geographical coordinate system with the Euler pole coordinates being the the translation factors.
Examples
data("nuvel1")
por <- subset(nuvel1, nuvel1$plate.rot == "na") # North America relative to Pacific plate
PoR_crs(por)
#> Coordinate Reference System:
#> User input: +proj=ob_tran +o_proj=longlat +datum=WGS84 +o_lat_p=48.709 +o_lon_p=-78.167
#> wkt:
#> GEOGCRS["unnamed",
#> BASEGEOGCRS["unknown",
#> DATUM["World Geodetic System 1984",
#> ELLIPSOID["WGS 84",6378137,298.257223563,
#> LENGTHUNIT["metre",1]],
#> ID["EPSG",6326]],
#> PRIMEM["Greenwich",0,
#> ANGLEUNIT["degree",0.0174532925199433],
#> ID["EPSG",8901]]],
#> DERIVINGCONVERSION["unknown",
#> METHOD["PROJ ob_tran o_proj=longlat"],
#> PARAMETER["o_lat_p",48.709,
#> ANGLEUNIT["degree",0.0174532925199433,
#> ID["EPSG",9122]]],
#> PARAMETER["o_lon_p",-78.167,
#> ANGLEUNIT["degree",0.0174532925199433,
#> ID["EPSG",9122]]]],
#> CS[ellipsoidal,2],
#> AXIS["longitude",east,
#> ORDER[1],
#> ANGLEUNIT["degree",0.0174532925199433,
#> ID["EPSG",9122]]],
#> AXIS["latitude",north,
#> ORDER[2],
#> ANGLEUNIT["degree",0.0174532925199433,
#> ID["EPSG",9122]]]]