The basic shadow constraint.
These shapes give an approximate area of shade cast by trees in midsummer.
The first shape is referred to in the British Standard, and the second, is a more realistic interpretation of this. We can add your preferred shape to your BS:5837 plan. It is quick to draw, is very affordable, and is often applied to a whole site, and then used by architects as a design tool.
Please contact us if you would like to discuss any of these services in greater detail.