This place is significant to Sherlock Holmes (2009) because in the city is the birthplace of the writer of the original stories of Holmes, Arthur Conan Doyle. I found this information on Wikipedia, which, is a combination of grassroots and gatekeeper. As Wikipedia, while editable by anyone, has to be checked by moderators before the edits can be made, based on the page. Mapping this location communicates to fans of Sherlock Holmes where Doyle spent most of his time writing. While none of his work actually takes place in South Norwood, he is able to explain just how dark and gloomy settings in the stories of Sherlock Holmes are, because it is just that rainy and cloudy in London. As well as talking about smaller town crimes that Holmes solves, of course, such did not occur in the movie, as the main case had a worldwide effect, almost akin to a Bond movie, in that sense.
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