A copy of the 'minimal_mesh' data set from the silicate package, with coordinate reference system information added.

Details

sfx is the old-style PROJ.4 and EPSG code CRS (prior to sf 0.8-1).

sfx_new is the new-style WKT2, with user input.

Warning

do not use this data in real situations, or as exemplary of the 'sf' format. It was created purely to add examples to this package.

Examples

## three equivalent representations, of increasing richness crs_epsg(sfx)
#> [1] 4326
crs_proj(sfx)
#> [1] "+proj=longlat +datum=WGS84 +no_defs"
crs_wkt2(sfx) ## did not exist in earlier sf
#> [1] NA
## new style crs_epsg(sfx_new) ## NA!
#> [1] NA
crs_proj(sfx_new) ## NA!
#> [1] NA
crs_input(sfx_new)
#> [1] "+proj=longlat +datum=WGS84 +no_defs"
crs_wkt(sfx_new)
#> [1] "GEOGCRS[\"WGS 84\",\n DATUM[\"World Geodetic System 1984\",\n ELLIPSOID[\"WGS 84\",6378137,298.257223563,\n LENGTHUNIT[\"metre\",1]]],\n PRIMEM[\"Greenwich\",0,\n ANGLEUNIT[\"degree\",0.0174532925199433]],\n CS[ellipsoidal,2],\n AXIS[\"geodetic latitude (Lat)\",north,\n ORDER[1],\n ANGLEUNIT[\"degree\",0.0174532925199433]],\n AXIS[\"geodetic longitude (Lon)\",east,\n ORDER[2],\n ANGLEUNIT[\"degree\",0.0174532925199433]],\n USAGE[\n SCOPE[\"unknown\"],\n AREA[\"World\"],\n BBOX[-90,-180,90,180]],\n ID[\"EPSG\",4326]]"