I am modeling streets in my city with linear referencing in ArcGIS Pro. This is all new to me, so I am not confident I have configured everything correctly. I am seeing what look like zero length events returned from "Overlay Route Events" even though the box is unchecked. My routes were set up such that:
- Route m values are derived from the length of the features.
- Route m values ignore spatial gaps.
- Roads are sectioned off for paving purposes, so that is an event layer without overlap (each section does share a m-value with adjacent sections, though).
- Construction events, like repaving a road, are an event layer with overlap and without pure overlap to the underlying sections (e.g. a contractor busts a water main and repaves only a part of a section of a road, not the entire section).
My goal is to get to an Excel file with data about the sections. I am using the tool "Overlay Route Events" with the "Keep zero length line events" unchecked. I have a construction event on route 0336 from 2282.2725 to 3029.9642. The FromMeasure there, 2282.2725, is the changeover point for the related sections 0336-00 and 0336-01. That is to say it is the FromMeasure for section 0336-00 and the ToMeasure for 0336-01 (sectionIDs were assigned before creating routes, and the tool chose the other direction for m values for this road). When I run "Overlay Route Events", I get the row:
| OBJECTID | RouteID | FromMeasure | ToMeasure | SECTIONID | STREETID |
| 123 | 0336 | 2282.2725 | 2282.2725 | A033601 | 0336 |
I have run this multiple times now, and gotten the same result. The only way I can get this row to not appear is to modify the FromMeasure for the construction event to 2282.2726. Route 0336 is not a multipart feature.
Does anyone have a workaround other than not having any of my events share vertices?
