Description Usage Arguments Details Value Examples
Measures the distance from points x to features in layer y.
1  distance_to(x, y, measure = NULL)

x 
points to measure distances from, to layer 
y 
feature layer to measure distance to. Expecting an 
measure 
method used to measure geographic distances between longlat

Uses the function nabor::knn
to determine the distance from each point in x
to the nearest feature in layer y
. If the input CRS is longlat, eg. EPSG 4326,
the distance is returned as measured by geodist::geodist
. Otherwise, if the
input CRS indicates projected coordinates, the distance returned is the
euclidean distance. Both x
and y
are expected to be sf
objects and
the distances are returned as vector, easily added to input x
with $<
or other methods. If y
is a 'POLYGON' or 'MULTIPOLYGON' object, the
distance returned for points in x
within features in y
are set to 0.
A vector
of distances from points in x
to features in layer y
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21  # Load sf
library(sf)
# Load nc data
nc < st_read(system.file("shapes/sids.shp", package="spData"))
st_crs(nc) < "+proj=longlat +datum=NAD27"
# Set number of sampling points
npts < 1e3
# Sample points in nc
ncpts < st_sample(nc, npts)
# Select first 5 of nc
ncsub < nc[1:5,]
# Measure distance from ncpts to first 5 of nc, printing result
distance_to(ncpts, ncsub, measure = 'geodesic')
# or add to ncpts
ncpts$dist < distance_to(ncpts, ncsub, measure = 'geodesic')

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