Monday, 19 September 2016

arcgis desktop - How to find errors (gaps and overlaps) in a line feature class in ArcMap


I have a line feature class that contains roads that were manually edited. Now I want to check if all road crossings have been edited correctly. I want to check that there is no small gap or overlap (<1m) at the road crossings. Dead ends are not errors. Which tool in arcmap could I use to highlight these errors?


To find small overlaps a solution is here, using first TOPOLOGY and second the tool "Feature Vertices to Points": Automatically marking all endpoints as exception in ArcGIS topology?


I am still looking for a soution for small gaps.


Small (<1m) gap and overlap in line feature class



Answer




alternative approach :


1) create end points on all lines


2) create buffers of a given size around all points.


3) use spatial join to count the number of lines that are intersected by the buffer: if you have more than one line, this is either a gap or a dangle (and you can screen out the dangles)


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