I also urge you to think twice about whether you are creating a community art piece or attempting to make a homemade pokestop. Aaron recently weighed in about the latter on a different post:
I am not saying that you can’t create art to submit, but be sure that it is community sanctioned and have evidence to back that up.
I haven’t been commenting on this post because I can’t get my head around the eligibility of the location, either.