Expand description
num_interior_rings(&g) — Σ interior-ring counts.
Mirrors boost::geometry::num_interior_rings from
boost/geometry/algorithms/num_interior_rings.hpp. Every kind that
is not a polygon (or multi-polygon) returns 0 by convention; for
polygons the count is the number of holes (interior_rings
accessor); a multi-polygon sums over its members.
Functions§
- num_
interior_ rings - Number of interior rings (holes) in
g.