Hanover, Ohio

The same ground, surveyed 71 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1915 1986

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1915 USGS Hamilton quadrangle1:62500, 2 printings
• 1917 USGS Hamilton quadrangle1:62500
• 1953 USGS Cincinnati quadrangle1:250000, 3 printings
• 1955 USGS Millville quadrangle1:24000, 4 printings
• 1957 USGS Cincinnati quadrangle1:250000
• 1986 USGS Cincinnati quadrangle1:100000, 3 printings

Centennial History of Butler County, Ohio, published 1905 has no passage naming this settlement, which was common for smaller places. Its township is covered in full.

Regional context, not property-specific evidence. Museums hold 1,873 specimens collected within 10 miles of Hanover (historical) between 1835 and 1975: 874 Animalia, 761 Fungi, 167 Plantae, 57 Protozoa, 13 Unrecorded, 1 Chromista. 12 distinct Species records are shown. Collected by A. R. Gaufin, A. V. J.; W. G. S., A.R. Gaufin, H.H. Ross and others. Each is a physical object with a catalogue number, and each entry opens the museum's record. This is what was collected and kept, not a survey of what lives here - nothing can be concluded from a species being absent.

Image	Species	Year	Collected by	Where, as recorded
	Leptostromataceae	1883	Prof. W. A. Kellerman
	Phyllosticta Pers., 1818	1883	W. A. Kellerman	Lancaster.
	Taphrina communis (Sadeb.) Giesenh.	1888	J. L. James
	Carex careyana Torr. ex Dewey	1835	Collector unknown	In ditione "Miami" civitatis Ohio.
	Carex convoluta Mack.	1835	Collector unspecified	"Miami"
	Carex gracillima Schwein.	1835	B. Frank	In ditione "Miami" civitatis Ohio.
	Spiza americana (J.F.Gmelin, 1789)	1879	Porter, J.B.
	Tringa solitaria A.Wilson, 1813	1879	Porter collection, J.B.
	Charadrius semipalmatus Bonaparte, 1825	1880	not recorded
	Chlidonias niger (Linnaeus, 1758)	1880	Porter collection, J.B.
	Tringa melanoleuca (J.F.Gmelin, 1789)	1880	Porter collection, J.B.
	Gavia immer (Brunnich, 1764)	1881	Porter, J.B.

All 1,873 specimens within 10 miles, at the Global Biodiversity Information Facility.

Regional context, not property-specific evidence. The federal mineral resources record lists 3 workings within 5 miles of Hanover (historical): 2 unknowns, 1 past producer. None of them still produces. What was taken out: Sand and Gravel, Construction, Iron. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Butler County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

This settlement is recorded in the Geographic Names Information System as feature 1065562. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Specimens. Global Biodiversity Information Facility (GBIF), https://www.gbif.org/. Only records licensed CC0 or CC BY are used. Records licensed CC BY-NC are excluded because this site carries advertising. Images are checked individually and any whose licence is non-commercial, no-derivatives or unreadable is refused.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.