topic Re: Identify missing lines between two datasets in Data Management Questions

Identify missing lines between two datasets

SarahRijneke — Tue, 07 Oct 2025 13:19:37 GMT

Hello, I'm looking for ideas for a workflow that compares two line feature classes and identifies roads that are missing. I have 2 road line feature classes stored in an SDE geodatabase. The lines store similar information but are created and maintained by two different departments (they have different road name standards and the geometry does not match). I would like to compare the lines and identify which ones from Roads_A are missing from Roads_B. My main concern at this point is identifying missing subdivisions like the one in red

Re: Identify missing lines between two datasets

VinceAngelo — Tue, 07 Oct 2025 18:00:24 GMT

One simple heuristic: Use Create Fishnet (Data Management) to partition the space, then iterate the features, using them to Select Layer By Location, and compare the number of selected features. If fishnet cell size is, say, 20-50% larger than the usual subdivision area, missing subdivisions will stand out in the feature counts.

From a computer vision standpoint: Symbolize the features with exceptionally wide line symbols, in two different primary or secondary colors with 50% transparency, then make a series of tiled images, and look for images (areas) where one color predominates.

- V

Re: Identify missing lines between two datasets

George_Thompson — Tue, 07 Oct 2025 18:31:20 GMT

This tool may be able to help: https://pro.arcgis.com/en/pro-app/3.4/tool-reference/data-management/feature-compare.htm