Maps from mainstream media are approximate and therefore unreliable for any edit. Maps from amateur sources are below the standards of Wikipedia for any edit. They violate
WP:SPS and
WP:CIRCULAR.
WP:SPS: "Anyone can create a personal web page, self-publish a book, or claim to be an expert. That is why self-published material, such as books, patents, newsletters, personal websites, open wikis, personal or group blogs, Internet forum postings, and tweets, are largely not acceptable as sources."
WP:CIRCULAR: "Do not use websites that mirror Wikipedia content or publications that rely on material from Wikipedia as sources."
See also: Wikipedia:Top 10 reasons why copying from maps is strictly prohibited on the Wikipedia Syria war map