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      <h1>THE BOOST.POLYGON LIBRARY</h1>
      <p>The Boost.Polygon library provides algorithms focused on
manipulating planar polygon geometry data.&nbsp; Specific algorithms
provided are the polygon set operations (intersection, union,
difference, disjoint-union) and related algorithms such as polygon
connectivity graph extraction, offsetting and map-overlay.&nbsp; An
example of the disjoint-union (XOR)