Roof-top open-air balcony swimming pool hand-drawn

Quick answer：

A hand-drawn illustration of a roof-top open-air balcony swimming pool typically depicts a design or concept for such a feature in architecture or home improvement. It often includes details such as the pool design, surrounding landscape, and the structure of the building to integrate the pool into the rooftop space. This type of illustration is commonly used for architectural presentations, interior design, or personal projects involving home renovations or additions.