Very large scale public-domain boundary maps of Providence, scanned from the Plat Book of the City of Providence Rhode Island, 1918. There’s an Overview of sections…

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…and hi-res scans of the plates of each section. 160ft to the inch, giving incredible amounts of detail (and also the names of the owner of each house plot) of the streets of Providence.

Presumably surveyed during the First World War, Lovecraft then about age 26 or 27. Compare with the 1891 Survey map to see how the area north of Lovecraft’s home was built up from the 1890s to 1918.