# NOT RUN {
## three equivalent representations, of increasing richness
crs_epsg(sfx)
crs_proj(sfx)
crs_wkt2(sfx) ## did not exist in earlier sf
## new style
crs_epsg(sfx_new) ## NA!
crs_proj(sfx_new) ## NA!
crs_input(sfx_new)
crs_wkt(sfx_new)
# }
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