Square feet can be constituted-of-or-filled-with (floor space).
Some square miles can be constituted-of-or-filled-with jungle.
A surface can be constituted-of-or-filled-with some square kilometers.
Some square feet can be constituted-of-or-filled-with glass.
Some square miles can be constituted-of-or-filled-with brush.
A (land area) can be constituted-of-or-filled-with some square meters.