The strip along the fence where nothing fills out
The plan
Demonstration, changes are not savedBack to the answer
Heights matter more than outlines here. A fence at the right height in roughly the right place gives a far better answer than a perfect outline at the wrong height. Drag things to move them, or select one and use the arrow keys; hold shift for larger steps.
The property line
A rectangle you set the size of, not a survey. It decides one thing: whether a position is yours. Anything standing outside it is a conversation with a neighbour rather than a trip to the timber yard, and the study says so.
Nudge it
BuildingNot yoursCanopyShadow nowCan see inProposed
Shadows drawn for
September · 18:00 · sun 11° up, WNothing selected
Click anything on the plan to set its height, how solid it is and what it is called. Drag it to move it.
Where this is
Chicago (demonstration) · 41.878, -87.630 · America/Chicago
This sets how much the reported ten-metre wind slows down at seat height.