# Identify Polyline Intersections - Enhanced **URL:** \ **Category:** Civil 3D\ **Created:** [August 19, 2021, 8:58pm UTC](https://forum.dynamobim.com/t/identify-polyline-intersections-enhanced/67345 "2021-08-19T20:58:07Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![mzjensen](https://avatars.discourse-cdn.com/v4/letter/m/b77776/32.png) [@mzjensen](https://forum.dynamobim.com/u/mzjensen)\ **Post date:** [September 14, 2022, 8:10pm UTC](https://forum.dynamobim.com/t/identify-polyline-intersections-enhanced/67345/9 "2022-09-14T20:10:55Z")
Hi @engineer_2_sequoia, This post will hopefully give you a good understanding of what is going on there and the various options available. > [@Dynamo For Civil 3D Binding](https://forum.dynamobim.com/t/dynamo-for-civil-3d-binding/77487/2): > > Hi @mparks8G2XN, This has been a point of confusion for a lot of folks for quite awhile, so let’s take the time to do a deep dive. Here’s an example. I’m using Civil 3D 2023 with Dynamo Core 2.13. Below is the test graph, about as basic as you can get - create a circle on layer 0 at the model space origin. (click to expand/collapse) play_button Case 1: No Binding Data Retained Cases 2-4 below will all have the same behavior when disconnecting/reconnecting input ports and changing input value… --- _[View the full topic](https://forum.dynamobim.com/t/identify-polyline-intersections-enhanced/67345)._