Choose representative points

Select a subset of points at a minimum tolerance distance from each other.

representative_points(x, dTolerance)

Arguments

x

Object of class sf
dTolerance

Numeric. Distance tolerance in m.

Value

Object of class sf with a subset of the original locations in x.

Examples


## 50 points in the unit square
require(sf)
x <- st_sfc(st_multipoint(matrix(runif(100), ncol = 2)), crs = 3857)
representative_points(x, .5)
#> Simple feature collection with 4 features and 0 fields
#> geometry type:  POINT
#> dimension:      XY
#> bbox:           xmin: 0.0132726 ymin: 0.05817565 xmax: 0.9931181 ymax: 0.9845655
#> epsg (SRID):    3857
#> proj4string:    +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs
#>                       geometry
#> 1  POINT (0.9931181 0.5361333)
#> 2  POINT (0.3072737 0.9845655)
#> 3 POINT (0.0132726 0.05817565)
#> 4   POINT (0.468959 0.4530892)