The series and one additional example: Continue reading What is the center line of a complex polygon? Routing Stream and Rivers Part Two

Continuing my posts on the centerline of a complex polygon (you can work your way backward from here), here’s it’s application to a riverine system (legend: light blue river, black centerline derived from routing through the skeleton of voronoi polygons from a densified stream bank set + the skipped skeleton bits in pink– read through the series if you if you don’t grok that explaination): Continue reading What is the center line of a complex polygon? Routing Stream and Rivers

I’ve had a series of posts (including this one) on finding the center line of a complex polygon– especially with an interest in finding the center line of streams and river bodies.  We have to give credit to my colleague Tom Kraft for solving the polygon centerline problem.  Tom struck upon the very elegant solution– derive the medial axis, and then use a few end … Continue reading What is the center line of a complex polygon? Routing as the solution

Today, I just show pictures of my process for filtering the medial axis of extraneous elements. I’ll let the pics tell the story for now: scale axis transform 3 scale axis transform 2 scale axis transform 1 previous post original Continue reading What is the center line of a complex polygon? New approach.

I didn’t remember that I had 4 previous post on this topic, but I’ve gotten a little obsessed with this problem– how to (with relatively little computational cost) kind the centerline of complex polygons, so we can extract flow lines from streams, label long complex polygons, easily generate the centerline parcel boundary line for river bound parcels, etc..  FYI, here are my 4 previous posts … Continue reading What is the center line of a complex polygon? (cont. again!)