topic Re: Reshape Edges Topology: Edge extent in ArcGIS Pro Questions

Reshape Edges Topology: Edge extent

jbcypreste — Fri, 07 Oct 2022 14:06:56 GMT

Hello. I am currently using topology-enabled reshape edges tool to fix some drainage basins.

When I select the edges on my polygons, some of them are all nice and cool, the whole edge is a single edge, like the upper one on the image below. But for some reason, other edges appear completely shattered into pieces, like the lower one on the image, with all the pink dots. You can see there is no other polygon for there to be multiple intersection points.

I tried selecting multiple edges and drawing a single line, but the error occurs then. What could be causing this?

jbcypreste_0-1665151303037.png

Re: Reshape Edges Topology: Edge extent

Robert_LeClair — Fri, 07 Oct 2022 15:52:12 GMT

Hmmm...this is odd. I wonder if what you're seeing are pseudonodes. According to the web - "The definition of Pseudo node is "Pseudo nodes occur where a single line connects with itself or where only two Polylines intersect." Let's try something to confirm. run the Multipart to Singlepart GP tool in ArcGIS Pro and then apply your Map Topology workflow again. Do you see the same as before?

Re: Reshape Edges Topology: Edge extent

jbcypreste — Fri, 07 Oct 2022 16:19:54 GMT

Did the multipart to single part... they are still around lol

jbcypreste_0-1665159094866.png

It only happens on a few specific edges, specifically between the limits of the major basins. So I guess something must've happened in the past when joining the features from different sources. My org has only recently switched from Map to Pro so there's that too.

I'm using Reshape Feature and Align Features for these cases. Thanks anyway!

Re: Reshape Edges Topology: Edge extent

Robert_LeClair — Fri, 07 Oct 2022 16:24:06 GMT

Thx for the feedback! So I now wonder if there are gaps/overlaps in your polygon FC. Are you able to create a geodatabase topology and add rules "must not have gaps" and "must not have overlaps"?

Re: Reshape Edges Topology: Edge extent

Scott_Harris — Fri, 07 Oct 2022 16:36:18 GMT

My best guess: there are other features that participate in the geodatabase topology that are not in the map (assuming you are using one and not just a map topology)

Re: Reshape Edges Topology: Edge extent

jbcypreste — Mon, 10 Oct 2022 17:35:13 GMT

Hey! I just ran "Find Overlaps" GP tool and there were a bunch of tiny thin gaps and overlaps between those features. I'm doing Reshape to fix them. Is there a tool to find all gaps and overlaps and/or to fix them automatically?

Re: Reshape Edges Topology: Edge extent

Robert_LeClair — Mon, 10 Oct 2022 17:37:44 GMT

I bet that's what's causing your pink nodes. You could create the GDB topology in a feature dataset and use the Error Inspector to find and correct gaps/overlaps.

Re: Reshape Edges Topology: Edge extent

jbcypreste — Mon, 10 Oct 2022 19:01:00 GMT

Thanks, it worked! I actually didn't know about gdb dataset topology until now, most here are still used to stacking shapefiles and I only started with pro a few months ago, no this will be very useful in the future.

Re: Reshape Edges Topology: Edge extent

JenniferCadkin — Tue, 11 Oct 2022 16:41:44 GMT

To manually clean up overlaps and gaps, you could use the Align Edge tool. This tool will work with geodatabase and map topologies.

on Edit tab, specify the Topology to use
from Modify Features pane, choose Align Edge-> edges are displayed with magenta symbology

JenniferCadkin_0-1665506385428.png

Hover the mouse cursor over the edge to align--> it will display with solid yellow line and possible target edges are shown with a dashed yellow line.

JenniferCadkin_1-1665506405645.png

If target is correct, click the edge to move it

JenniferCadkin_2-1665506422269.png

Re: Reshape Edges Topology: Edge extent

LaraOles1 — Thu, 13 Feb 2025 17:30:49 GMT

Based on your data being in shapefile format, I bet many polygons that are supposed to be adjacent were not created correctly by using the snapping, autocomplete polygon, or trace tools. I bet there are many feature classes that have gaps an overlaps between polygons that are supposed to be coincident. Instead of fixing all your "braided" digitization one overlapping segment at a time, or even searching for them using gdb topology, if you find gaps and overlaps, I would just assume that the entire feature needs alignment and use the Align Features tool.