urn off clipping.  Clipping is on by default because calculating the intersection(s) of a million-point flight line with another multi-million point flight line would be very slow.</p><h2>Example: Intersection of snowmobile track with grounding line<a name="3"></a></h2><p>Here we'll grab (very approximate) grounding line data from <a href="https://www.mathworks.com/matlabcentral/fileexchange/60246">Mouginot et al</a> and see where it intersects a snowmobile track given by four waypoints:</p><pre class="code