sfg point

constructs sfg POINT object

sfg_point(obj, x = NULL, y = NULL, z = NULL, m = NULL)

Arguments

obj

matrix or data.frame

x

x geometry column

y

y geometry column

z

z geometry column

m

m geometry column

Value

sfg object of POINT geometry

Examples

sfg_point( 1:2 )
#>      [,1] [,2]
#> [1,]    1    2
#> attr(,"class")
#> [1] "XY"    "POINT" "sfg"  
sfg_point( 1:3 )
#>      [,1] [,2] [,3]
#> [1,]    1    2    3
#> attr(,"class")
#> [1] "XYZ"   "POINT" "sfg"  
sfg_point( 1:4 )
#>      [,1] [,2] [,3] [,4]
#> [1,]    1    2    3    4
#> attr(,"class")
#> [1] "XYZM"  "POINT" "sfg"  

sfg_point( matrix( 1:3, ncol = 3 ) )
#>      [,1] [,2] [,3]
#> [1,]    1    2    3
#> attr(,"class")
#> [1] "XYZ"   "POINT" "sfg"  
sfg_point( data.frame( x = 1, y = 2, z = 3 )  )
#>      [,1] [,2] [,3]
#> [1,]    1    2    3
#> attr(,"class")
#> [1] "XYZ"   "POINT" "sfg"  

sfg_point( data.frame( x = 1, y = 2, z = 3 ), x = "x", y = "y" )
#>      [,1] [,2]
#> [1,]    1    2
#> attr(,"class")
#> [1] "XY"    "POINT" "sfg"  
sfg_point( data.frame( x = 1, y = 2, z = 3 ), x = 1, y = 3  )
#>      [,1] [,2]
#> [1,]    1    3
#> attr(,"class")
#> [1] "XY"    "POINT" "sfg"