A bit off topic but the most important consideration for field selection is being able to make it. A field that is close but not perfect is always better than the perfect field that is farther away
Should be part of the brief - I always point out after discussing the 5 'S's that any field will be a compromise, it needs to be close enough and it needs picking
quickly, amazing how many checkouts I do where the pilot spends so long picking his field he has lost most of the decent ones anyway!