From the modeling point of view, outdoor umbrella is divided into side umbrella, Roman umbrella, banana umbrella.
For the side umbrella, the umbrella column is more unilateral independent, high space utilization. Usually with the base, mostly umbrella body and seat are separated, easy to disassemble and install. The most common is the folding gazebo, not only easy to install, but also easy to carry. The Roman umbrella is the most pleasant one, can control the rotation and lift of the umbrella through the handle. Banana umbrella and Roman umbrella have similar style, umbrella surface is easier to disassemble and clean.