Split Shapefile (KML) at two vertices fails with hole in area

AlexW
AlexW
in Vector Data

Dear Global Mappers,

splitting area features at two vertices is quite easy, but now i have an area with a hole inside and this causes trouble.

When i select the two vertices i would like to split at also the hole area is selected and the option "split selected areas at selected vertices" doesn't appear.

How would you perform splits like this?


Thx in advance

Alex

Bild_2025-05-21_150249790.png


Best Answer

  • sphillips
    sphillips
    Answer ✓

    Hi AlexW,

    Another workflow is to export to KMZ again with an Export Bounds:

    1.     Draw a boundary through the vertices and around what you want to keep

    2.     Select the area feature

    3.     Right-click > Export

    4.     Choose KMZ

    5.     Go to the Export Bounds tab

    6.     Select Crop to Selected Area Feature(s)

    7.     OK


    Cheers,

    Steve

    image.png
    image.png
    image.png


Answers

  • tikhpetr
    tikhpetr

    Hello!

    My English is very bad. Could you clarify what kind of result do you need? You can just a picture.

  • AlexW
    AlexW

    Hi,

    thanks for your Email.

    I would like to cut the orange area into two areas (at the green markers).

    But the red area in the middle (the hole) is also selected when i select any inner vertice.

    And because of this i cannot use the "split selected areas at selected vertices" function.


    Best regard

    Bild_2025-05-21_185328839.png


  • AlexW
    AlexW

    Here's a file to check it.

    Mitte.zip


  • sphillips
    sphillips
    2025-05-21_Missionsplanung Mitte_clipped.zip

    Clipped version here.

  • AlexW
    AlexW

    Steve, thanks a lot. 🤩🙏

    That's a great workaround. And so simple. Why didn't i try this path?

    😂🙈

    I can do the job to split this "donut" now - though i would really like to understand a little better the behavior and functionalities behind...

    So, if anyone still wants to comment here, you're welcome.

    Greetings from Germany.

    Alex

  • sphillips
    sphillips
    https://www.globalmapperforum.com/discussion/comment/54190#Comment_54190

    Here's another way to do it. This method will split the area feature so that you can delete the unwanted area:

    1. Draw Lines across the Area Features you wish to split. The lines can go outside of the area feature but they must at minimum touch the edges!
    2. Holding down the Ctrl key - Select the Line(s) and then the Area feature (doesn’t appear to like using select all or drawing a selection around all the features for me)
    3. Right-click > Crop/Combine/Split Functions > Crop Selected Area(s) to Selected Lines(s)


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