S2 Geography Predicates

These functions operate two geography vectors (pairwise), and return a logical vector.

Usage

s2_contains(x, y, options = s2_options(model = "open"))

s2_within(x, y, options = s2_options(model = "open"))

s2_covered_by(x, y, options = s2_options(model = "closed"))

s2_covers(x, y, options = s2_options(model = "closed"))

s2_disjoint(x, y, options = s2_options())

s2_intersects(x, y, options = s2_options())

s2_equals(x, y, options = s2_options())

s2_intersects_box(
  x,
  lng1,
  lat1,
  lng2,
  lat2,
  detail = 1000,
  options = s2_options()
)

s2_touches(x, y, options = s2_options())

s2_dwithin(x, y, distance, radius = s2_earth_radius_meters())

s2_prepared_dwithin(x, y, distance, radius = s2_earth_radius_meters())

Arguments

x, y: geography vectors. These inputs are passed to as_s2_geography(), so you can pass other objects (e.g., character vectors of well-known text) directly.
options: An s2_options() object describing the polygon/polyline model to use and the snap level.
lng1, lat1, lng2, lat2: A latitude/longitude range
detail: The number of points with which to approximate non-geodesic edges.
distance: A distance on the surface of the earth in the same units as radius.
radius: Radius of the earth. Defaults to the average radius of the earth in meters as defined by s2_earth_radius_meters().

Model

The geometry model indicates whether or not a geometry includes its boundaries. Boundaries of line geometries are its end points. OPEN geometries do not contain their boundary (model = "open"); CLOSED geometries (model = "closed") contain their boundary; SEMI-OPEN geometries (model = "semi-open") contain half of their boundaries, such that when two polygons do not overlap or two lines do not cross, no point exist that belong to more than one of the geometries. (This latter form, half-closed, is not present in the OpenGIS "simple feature access" (SFA) standard nor DE9-IM on which that is based). The default values for s2_contains() (open) and covers/covered_by (closed) correspond to the SFA standard specification of these operators.

Examples

s2_contains(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)")
)
#> [1]  TRUE FALSE

s2_within(
  c("POINT (5 5)", "POINT (-1 1)"),
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))"
)
#> [1]  TRUE FALSE

s2_covered_by(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)")
)
#> [1] FALSE FALSE

s2_covers(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)")
)
#> [1]  TRUE FALSE

s2_disjoint(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)")
)
#> [1] FALSE  TRUE

s2_intersects(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)")
)
#> [1]  TRUE FALSE

s2_equals(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c(
    "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
    "POLYGON ((10 0, 10 10, 0 10, 0 0, 10 0))",
    "POLYGON ((-1 -1, 10 0, 10 10, 0 10, -1 -1))"
  )
)
#> [1]  TRUE  TRUE FALSE

s2_intersects(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)")
)
#> [1]  TRUE FALSE

s2_intersects_box(
  c("POINT (5 5)", "POINT (-1 1)"),
  0, 0, 10, 10
)
#> [1]  TRUE FALSE

s2_touches(
  "POLYGON ((0 0, 0 1, 1 1, 0 0))",
  c("POINT (0 0)", "POINT (0.5 0.75)", "POINT (0 0.5)")
)
#> [1]  TRUE FALSE FALSE

s2_dwithin(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)"),
  0 # distance in meters
)
#> [1]  TRUE FALSE

s2_dwithin(
  "POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))",
  c("POINT (5 5)", "POINT (-1 1)"),
  1e6 # distance in meters
)
#> [1] TRUE TRUE

Usage

Arguments

Model

See also

Examples