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  • 1.  Thinning overlapping polygons

    Posted 03-28-2019 16:20
      |   view attached
    Hey all,

    was wondering if anyone knows if it's possible to use the node thinning functionality on overlapping polygons, where it essentially maintains the integrity/structure of each of the polygons themselves.

    I've attached a sample of the polygons I'm using.


    Stefan Bonitatibus
    Shelton CT


    zip   32 KB 1 version

  • 2.  RE: Thinning overlapping polygons

    Posted 03-29-2019 03:35
    @Tony Maber @Peter Møller can you help my Canadian PB ​​​friend and colleague?


    Kolt Luty
    Director - Telco Solutions (Australia)

  • 3.  RE: Thinning overlapping polygons

    Posted 04-02-2019 07:59
    Hi Stefan,

    I'm not exactly sure what mean by "integrity/structure of each of the polygons themselves"?

    But, the thinning tool is designed to respect common borders so if two boundaries share a common border, the nodes removed will be the same nodes on the border in the two polygons.

    To make this work, you need to select all the records and use the thinning tool on all objects in the same process.

    Let me know if this answers your question. If not share some more details on what you are looking for


    Peter Horsbøll Møller
    Pitney Bowes

  • 4.  RE: Thinning overlapping polygons

    Posted 04-03-2019 18:24
    Hi Peter/Stefan

    I think the issue here is that they are overlapping polygons.  When you run the thinning tool it splits up the polygons that are overlapping, meaning it doesn't retain the integrity or structure.  Certainly works fine in principle, but when I tested it split the Test_Polys file that Stefan supplied into separate portions - seemingly using a reverse table order of object priority in terms of how it chooses to split up the overlaps.  If this is what Stefan is looking for then it works fine.
    Stefan, as Peter says, if this is not what you are looking for can you please share some more details.

    Tony Maber
    Pitney Bowes Software Pty Ltd (formerly Encom and MapInfo)
    North Sydney