Polylines get additional node at intersection when joining them

[Marijan]

I have some tool that connects certain point objects with polyline in specific order. I have noticed some polylines have additional node in point of intersection. After inspecting this deeper, I found out that if you have two polylines, each one is crossing it self, and touching each other at endpoints, and  you try to combine them, you get additional node at intersection (actually 4 nodes, one for each line segment included in intersection)

This is how it looks: https://gifyu.com/image/SkVtB

Is this normal behaviour of Combine tool when dealing with polylines? 

If is, how to properly join two polylines in MI? 

[Peter Horsbøll Møller]

Hi Marijan

 

Yeah, that is the expected behavior.

MapInfo Pro introduce a new algorithm back in v9.5.1.

The polylines are split into segments to avoid self-intersecting points.

 

If you want you can still tell MapInfo Pro use the old algorithm.

Run this statement in the MapBasic window:

 

Set Combine Version 950

 

I’m not sure which of the two resulting objects is correct, if any 😊

 

Peter

 

—

Peter Horsbøll Møller

Principal Sales Engineer - Distinguished Engineer

Precisely.com

 

From: mapi...@googlegroups.com <mapi...@googlegroups.com> On Behalf Of Marijan
Sent: Thursday, 22 December 2022 09.33
To: MapInfo-L <mapi...@googlegroups.com>
Subject: [MI-L] Polylines get additional node at intersection when joining them

 

This message originated Externally. Use proper judgement and caution with attachments, links, or responses.

--
--
You received this message because you are subscribed to the
Google Groups "MapInfo-L" group.To post a message to this group, send
email to mapi...@googlegroups.com
To unsubscribe from this group, go to:
http://groups.google.com/group/mapinfo-l/subscribe?hl=en
For more options, information and links to MapInfo resources (searching
archives, feature requests, to visit our Wiki, visit the Welcome page at
http://groups.google.com/group/mapinfo-l?hl=en

---
You received this message because you are subscribed to the Google Groups "MapInfo-L" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mapinfo-l+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/mapinfo-l/c26f9f4e-14da-4bcf-b851-b182b3e84dden%40googlegroups.com.