Test whether geometries are identical within a tolerance

TRUE when x and y have the same type and structure and every coordinate lies within tolerance of its counterpart. ga_equals_exact() recycles y and tolerance against x.

Usage

ga_equals_exact(x, y, tolerance = 0)

Arguments

x

a GeoArrow geometry array

y

a GeoArrow geometry array; length 1 or the same length as x

tolerance

the largest planar distance allowed between matching coordinates; length 1 or the same length as x

Value

a boolean array of the same length as x

Details

Unlike ga_equals_topo(), ga_equals_exact() compares coordinates in order, so it does not treat a line and its reverse as equal. It measures planar distance between coordinates and returns NA for a null on either side.

See also

Other topology: ga_contains(), ga_coordinate_position(), ga_dimension(), ga_filter(), ga_is_empty(), ga_join(), ga_relate(), ga_sparse_equals_exact(), ga_sparse_intersects(), ga_sparse_pairs()

Examples

x <- geoarrow::as_geoarrow_array(sf::st_sfc(
  sf::st_linestring(rbind(c(0, 0), c(1, 1))),
  sf::st_linestring(rbind(c(1, 1), c(0, 0)))
))
y <- geoarrow::as_geoarrow_array(sf::st_sfc(
  sf::st_linestring(rbind(c(0, 0), c(1, 1.01)))
))

# ga_equals_exact() does not treat the reversed line as equal
as.vector(ga_equals_exact(x, y, 0.1))
#> [1]  TRUE FALSE