Additional utility functions for sf objects

transform_sf() is similar to sf::st_transform() but supports sf, sfc, or bbox objects as the crs parameter, supports sfg objects (transformed to sfc), and uses sf::st_set_crs() if the CRS for the provided object is NA. This function does not support bounding box transformations.
relocate_sf_col() relocates the sf geometry column after specified column (by default after everything).
rename_sf_col() a wrapper for sf::st_set_geometry() that renames the sf column.
get_sf_col() returns the "sf_column" attribute.
get_sf_colnames() returns the column names of a file that can be read with sf::read_sf() to allow you to use column names to build a query (or provide a value for name_col) without reading the whole file.

Usage

transform_sf(x, crs = NULL, allow_null = TRUE, ...)

relocate_sf_col(x, .after = dplyr::everything())

rename_sf_col(x, sf_col = "geometry")

get_sf_col(x = NULL)

get_sf_colnames(x = NULL, dsn = NULL, layer = NULL, ...)

Arguments

x: A sf or sfc object. If x has a missing crs, the crs is set to the provided value.
crs: A coordinate reference system identifier (numeric or character) or a sf, sfc, bbox, or crs class object supported by sf::st_crs().
allow_null: If TRUE and crs is NULL, return x.
...: Additional parameters passed to sf::st_transform() by transform_sf() or to sf::read_sf() by get_sf_colnames() if x is not NULL.
.after: The location to place sf column after; defaults to dplyr::everything().
sf_col: Name to use for the sf column after renaming; defaults to "geometry".
dsn: data source name (interpretation varies by driver - for some drivers, dsn is a file name, but may also be a folder, or contain the name and access credentials of a database); in case of GeoJSON, dsn may be the character string holding the geojson data. It can also be an open database connection.
layer: layer name (varies by driver, may be a file name without extension); in case layer is missing, st_read will read the first layer of dsn, give a warning and (unless quiet = TRUE) print a message when there are multiple layers, or give an error if there are no layers in dsn. If dsn is a database connection, then layer can be a table name or a database identifier (see Id). It is also possible to omit layer and rather use the query argument.