I'm currently studying for my exam in Geospatial Databases and I've come across a question which I'm not quite sure how to solve.
We're given a visual topological space (picture below) and we need to draw the interior, boundary and closure of this space.
I understand what these terms represent but I'm not quite sure how to transfer them to a visual domain.
This is the given space:
This is my "solution":
I apologize if this is the wrong place to ask this type of question.
Any help is appreciated.