topic Re: Find inflection points on polylines in Python Questions

Find inflection points on polylines

Kathrynkennedy — Thu, 06 Sep 2012 17:51:42 GMT

Hi there,

Has anyone seen a script--or know of a Python function or class--that gets the inflection points along a polyline? (Inflection is the point at which the line changes direction.) I saw an "iPoint" in a VB script but I don't know VB, and I'm using ArcGIS 10 so I'd need to do this in Python anyway. There is an AddIn, called "Curves and Lines," which grabs the inflection points but goes on to grab all points where the polyline bends and then splits up the line, which I don't want. If it were written in Python I'd just look at that part of the code, but it's an AddIn so I can't look at the coding.

Here's the link to Curves and Lines, just for fun:

http://www.arcgis.com/home/item.html?id=b59665cb906a435da3f8c45332d7cfdf

Thanks for any suggestions!
Heather

Re: Find inflection points on polylines

GeorgeNewbury — Fri, 14 Sep 2012 21:33:59 GMT

I would suggest emailing the ArcGIS Parcel Editor Development Team. Otherwise you are looking at programming in a lot of math.

Re: Find inflection points on polylines

Kathrynkennedy — Mon, 17 Sep 2012 18:11:37 GMT

I would suggest emailing the ArcGIS Parcel Editor Development Team. Otherwise you are looking at programming in a lot of math.

Thanks George! That finally occurred to me today 😉