What is the center line of a complex polygon? New approach.

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:

3 thoughts on “What is the center line of a complex polygon? New approach.”

Nathan Hopper says:

May 31, 2012 at 12:41 pm

I found your post today and I’m very interested in your techniques. I’m conducting some research on river depth probabilities from belief networks but one of my main inputs is the centerline of the river polygon. I already have geoprocessing tools to derive the river polygon quickly but now I need a way to derive the centerline. I found some GP tools but they require ArcInfo and I only have acess to Editor. I’m not that familiar with other GIS softwares do most of my work through the geoprocessor or python. Any help or suggestions would be greatly appreciated.

Thanks,
Nate

Reply
1. smathermather says:
  
  June 3, 2012 at 11:15 pm
  
  Hi Nathan,
  If you’re thinking of using PostGIS, you can do it in R or pl/python, e.g.
  http://www.bostongis.com/PrinterFriendly.aspx?content_name=postgresql_plr_tut02
  http://geogeek.garnix.org/2012/04/faster-voronoi-diagrams-in-postgis.html
  
  Best,
  Steve
  
  Reply
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