Smartly convert an object to a simple features data frame

Source: R/smart_as_sf.R

Converts R objects to sf::sf objects, but supports a wider range of input data than sf::st_as_sf.

smart_as_sf(x, ...)

# S3 method for default
smart_as_sf(x, ...)

# S3 method for data.frame
smart_as_sf(x, ...)

# S3 method for character
smart_as_sf(x, ...)

Arguments

x

any of the following:

  • a matrix: Either a matrix with named longitude and latitude columns or an unnamed two column matrix containing longitude and latitude (in that order)

  • a data.frame with named longitude and latitude columns

  • an sf::sfc_POINT object

  • a named or unnamed numeric vector of length 2 containing a single longitude-latitude coordinate pair

  • a character scalar path or URL to a shapefile or zipped shapefile
...

ignored

Value

an sf::sf data.frame

Note

smart_as_sf.default() looks if an sf::st_as_sf(), sf::st_as_sfc() or as_coord_matrix() method exists for x (in that order). If you are a package developer and want to support smartmap for a custom S3 class in your package, it is enough to provide one of these methods.

Examples

smart_as_sf(data.frame(lat = c(1,2,3), longitude = c(3,4,5)))

#> Simple feature collection with 3 features and 2 fields
#> Geometry type: POINT
#> Dimension:     XY
#> Bounding box:  xmin: 3 ymin: 1 xmax: 5 ymax: 3
#> CRS:           EPSG:4326
#>   lat longitude    geometry
#> 1   1         3 POINT (3 1)
#> 2   2         4 POINT (4 2)
#> 3   3         5 POINT (5 3)
smart_as_sf(c(1, 2))

#> Simple feature collection with 1 feature and 0 fields
#> Geometry type: POINT
#> Dimension:     XY
#> Bounding box:  xmin: 1 ymin: 2 xmax: 1 ymax: 2
#> CRS:           EPSG:4326
#>      geometry
#> 1 POINT (1 2)