G'day sir/maám, thank you for the feedback, Im new in town and city mapping and generally map nature, mountain and ridges sort of. I will try to improvise in city town mapping.
As of Greenhouse made of glass or polycarbonate panels, are generally more expensive to construct and maintain, while Polyhouse  are typically smaller, more mobile, and ideal for small-scale,  are cost-effective, provide good natural light transmission more affordable and easier to install and maintain than traditional greenhouses.
The structures that found in area mapped with line appeared (ariel imagery and eos landviewer view) more like polyhouse 