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I want to find instances where lines share a common ID, but the constituent parts are disjointed and not connected to each other.

AnasAlkhrissat

I'm working in ArcGIS Pro with a line feature class named 'iso.' Initially, this feature class contained merged lines, meaning they were multipart. The parts (segments) were merged and connected seamlessly. Now, I am interested in identifying lines with the same ID where the parts are not connected. In other words, I want to find instances where lines share a common ID, but the constituent parts are disjointed and not connected. like below iso_id is 8409. just i want to discover these error .not solved

iso.PNG

MatthewProctorBrown_0-1732129326701.png

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KaitlynR

Hi there,

You mentioned that the line features were initially multipart. Assuming that the features are now exploded/independent, the Find Identical tool may be what you're looking for.

If you're looking to identify multipart features, I would suggest taking a look at this thread.

Cheers,

Kaitlyn

AnasAlkhrissat

AS YOU CAN SEE FROM THE IMAGE . I want to detect this particular case where there is an inconsistency. The ISOid is the same, but the parts are not connected, meaning there are gaps between them.

KaitlynR

Using the Find Identical tool with iso_Id as your input field will return any records that share an ID.

AnasAlkhrissat

@KaitlynR ,

An identical tool in this case just shows where the line shares the same iso_id. however that is not enough. what I am looking to check if all these segments that shares the same iso-id if they are connected, and no gap between them like the image I shared above.`

AnasAlkhrissat

@KaitlynR in other words ,

So I Looking to detect if spatial disconnect exists in segments with similar ISO IDs

Dale_Honeycutt

My first thought is to use the Unsplit Line geoprocessing tool using iso_id as your Dissolve Field. In your example above, you'll end up with 3 lines with 8409 as its iso_id. To get a count of number of lines with the same iso_id, use the Summary Statistics tool using iso_id as your Statistic Field and Count as your Statistic Type. Any iso_id with count > 1 will have disconnected segments.

AnasAlkhrissat

that will not give me if the 3 lines are not connected and this my probloem

Dale_Honeycutt

I guess I don't understand the problem. I made the following test case. There are 7 lines, all with iso_id of 8409:

original lines.jpg

I ran Unsplit Line as follows

unsplit line dialog.jpg

Which gives me this feature class and attribute table

There are 3 instances of 8409, meaning that the line is disconnected in 2 places. I imagine in your case that the output of Unsplit Lines might be a feature class with 100s of lines, and finding rows with the same iso_id might be hard, so use Summary Statistics to find which lines are disconnected.

sum stats dialog.jpg

Output of Summary Statistics. Any row with FREQUENCY > 1 is a disconnect.

sum stats table.jpg

You can use this information to display disconnected lines -- perhaps joining your original lines to this table using iso_id as the key.

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