To give you a little more insight in the English language, "in site" is basically a meaningless collection of two real words that would sound exactly like "insight". Site is (sort of) a specific location, you can't be in it, but you can be in a building or a hole in the ground that is on-site. Sight is related to seeing, but insight is related to seeing interactions in your mind and gaining the insight(understanding) into how they relate to each other.
A University campus is a site that can encompass several blocks and buildings, yet is still one site.
TrustyTony commented: Out of topic, this is Python forum -3
Narue commented: Oh my god, go get yourself a sense of humor. -4