o build a connectivity
graph on polygons</li>
            <li><a href="gtl_property_merge_usage.htm">property_merge_usage.cpp</a>
Using the n-layer map-overlay algorithm on polygon data</li>
          </ul>
        </li>
        <li>Tutorials:
          <ul>
            <li><a href="gtl_tutorial.htm">Layout Versus Schematic</a>
Learn how to apply Boost.Polygon capabilities to implement a simplified
circuit extraction application</li>
            <li><a href="gtl_minkowski_tutorial.htm">Minkowski Sum</a>
Lea