Portal criteria question
As we know if the candidate is on the school grounds it should be 1* voted in OPR. The same situation if the candidate could be reached outside, but it is located on the outer border of the school. So what about the situation when the portal could be seen and reached only from the school grounds, it is located on the border of school and non-school areas, but the fence or building is not a school property as on the scheme below?
The buildings 1 and 2 are the property of the factory(or country or city). So is the graffiti on the wall of the building 1 is a good candidate for a portal?