May I encourage the use of the term "topographic romance" -- if it seems like it would sometimes be useful in the context of weird fiction?
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fancyclopedia.org]
There is also "cartographic romance":
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fancyclopedia.org]
My guess is that much weird fiction really doesn't qualify as either of these, because the setting is not worked out in those terms. The story might have a strong sense of place (Poe's House of Usher), yet not involve maps or much detail. There could be stories that almost do -- I think of Kipling's "They," where the sense of the Sussex locale is important -- but it would be pushing things to argue that it's a topographic romance.
Lovecraft's stories sometimes seem like they could be situated on a map of the region drained by the Miskatonic River, but I don't think HPL created a serious map of the locales.
Dale Nelson