I will try to describe the process of creating a multipolygon in Vespucci. In the picture there is a forest with a meadow inside. First, draw the outline of the meadow and add the natural=grossland tag:
Next, draw the outline of the forest without adding tags:
Double click on the inner path to select both paths. Click on the three dots in the lower right corner. There we select “Create relation” and then “Multipolygon”
Then click here:
And here:
Set the forest tag for the multipolygon - natural=wood:
On the “Members” tab, check the presence of roles for the outer and inner contours and click here:
The multipolygon of the forest with an internal meadow is ready - you can send data to the server.