I have two layers, see image below:
- Yellow: the ground where people can build;
- Red: existing buildings.
Create a shapefile of all grounds where >50% of the grounds are free.
In order to do this, I am wondering whether or not it is possible to dissolve the red features based on the yellow layer. In other words: I'd like to join/dissolve the red features within a yellow feature. If that were possible, a simple
area (red) / area (yellow) * 100 would do the trick to calculate the area in use.
area (red) / area (yellow) * 100 without joining/dissolving red leads to an outcome that is not easily understandable.