Generate the minimum bounding circle

Usage

st_minimum_bounding_circle(x, nQuadSegs = 30)

Arguments

x: object of class sfg, sfg or sf
nQuadSegs: number of segments per quadrant (passed to st_buffer)

Value

Object of the same class as x

Details

st_minimum_bounding_circle uses the lwgeom_calculate_mbc method also used by the PostGIS command ST_MinimumBoundingCircle.

Examples

library(sf)
#> Linking to GEOS 3.10.2, GDAL 3.4.1, PROJ 8.2.1; sf_use_s2() is TRUE
#> 
#> Attaching package: ‘sf’
#> The following object is masked from ‘package:lwgeom’:
#> 
#>     st_perimeter

x = st_multipoint(matrix(c(0,1,0,1),2,2))
y = st_multipoint(matrix(c(0,0,1,0,1,1),3,2))

mbcx = st_minimum_bounding_circle(x)
mbcy = st_minimum_bounding_circle(y)

if (.Platform$OS.type != "windows") {
  plot(mbcx, axes=TRUE); plot(x, add=TRUE)
  plot(mbcy, axes=TRUE); plot(y, add=TRUE)
}



nc = st_read(system.file("gpkg/nc.gpkg", package="sf"))
#> Reading layer `nc.gpkg' from data source 
#>   `/home/runner/work/_temp/Library/sf/gpkg/nc.gpkg' using driver `GPKG'
#> Simple feature collection with 100 features and 14 fields
#> Geometry type: MULTIPOLYGON
#> Dimension:     XY
#> Bounding box:  xmin: -84.32385 ymin: 33.88199 xmax: -75.45698 ymax: 36.58965
#> Geodetic CRS:  NAD27
state = st_union(st_geometry(nc))

if (.Platform$OS.type != "windows") {
  plot(st_minimum_bounding_circle(state), asp=1)
  plot(state, add=TRUE)
}