polygonqgisshapefilesplitting
I am trying to split polygons using the 'Split Features' tool. This works for most polygons except for the ones that consist of a full circle such as the selected polygon in the snapshot below:
I also tried using 'Split selected features with selected line from another layer'. This does not work either.
To update Curlew above, as of QGIS 2.18, you would use the built-in Advanced Digitizing Toolbar, which can be accessed via View > Toolbars > Advanced Digitizing Toolbar. The toolbar will look like this and the "Split Features" button is the fifth from the right:
With that loaded, and the respective later selected and in Edit mode, select the "Split Features" tool and use it to draw through the place(s) where you want to create segments. You can then use the "Node Tool" to select vertices and move them wherever the new segments should be positioned. A quick summary looks like this:
In the end, each segment will then become an independent feature in your vector layer. Be sure to save your edits!
For more information, see the QGIS user manual section on advanced digitizing.
You didn't specify it in your question but it looks like you are using QGIS.
The "Split selected feature with select line from another layer" tool is from the Digitizing Tools plugin. You may need to download/install from the toolbar menu:
Plugins > Manage and Install Plugins
Once installed and enabled, it should show up in the toolbar. If not then right-click anywhere on the toolbar and you should see the option to enable it:
The icon for the "Split selected feature with select line from another layer" tool is this one:
Best Answer
In order to solve this issue the polygon had to be split at two places simultaneously. i.e. when using 'Split Features' make sure that the line drawn intersects the polygon twice.