Poly campaigns are usually "is it in?" or "is it OUT?" If the object we are to look for is IN the poly, mark accordingly. But if the object is outside the poly, beside but not in the poly, or on the same tile but no where near the poly, then it is OUT--- mark that you do not see the object INSIDE the poly.
Doesn't that mean the ones outside a poly are missed then???? No. the computer assigns polys and zips the nodder this way, that way, across a tile or tiles....and eventually, an object you fear was missed is caught in a different poly.