I am running MapInfo 15.0 and need to perform a Union of two polygon layers (i.e. combine the two and preserve all boundaries and associated attributes). I know there is some ambiguity over the term Union but I essentially want to do what Esri considers a Union, only in MapInfo. More information on Esri's take on Union can be found at:


Any help will be great!


For anyone else struggling with this I found the following post of use:


Essentially I ended up performing a split; setting one layer as the target objects and then using the other to split it.

I then used update column to append (via essentially a spatial join) the data from the table used to perform the split into the target table.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.