How to Make Maps Using Mapping Software (QGIS)

[Krago]

Thanks for replying so quickly.

I tried using Intersection, but it seems to create a temporary layer.  I actually want to split the polygon in Layer A.

Where do I find the 'Split by Line' tool?

[cinyc]

It's also in the Toolbox.

You can save it as a permanent layer by hitting the dots and saving it wherever you want.

[Krago]

Hi again.

I don't want to save it as a temporary or permanent file.  I want to split a polygon in Layer A and save the two pieces in Layer A.

[cinyc]

Run an intersection on the selected polygons. Make sure Layer A is first listed, in case of duplicate column names, so that they don't get a _2 prefix.

Delete the old polygon in Layer A. Copy and paste the new shps from the temporary intersection into Layer A.

Make sure you do this on a seperately-saved version of Layer A if you want to reuse the old shapefile for a different project.

[Krago]

It works.  Thank you.