A tagged-value constructor that marks a numeric threshold as a distance
in miles. Converted to kilometres internally by cl_geo_distance().
Examples
il_spec() |>
il_compare(c(lat, lon), cl_geo_distance(mi(3), mi(30)))
#> Linkage Specification
#> Comparisons (1):
#> lat, lon : geo_distance
#> Blocking rules: (none)
