Four Corners, Ohio

The same ground, surveyed 82 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1912 1994

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.

• 1912 USGS Perrysville quadrangle1:62500
• 1915 USGS Perrysville quadrangle1:62500
• 1944 USGS Perrysville quadrangle1:62500
• 1950 USGS Marion quadrangle1:250000
• 1961 USGS Butler quadrangle1:24000
• 1961 USGS Butler quadrangle1:24000
• 1961 USGS Butler quadrangle1:24000
• 1961 USGS Butler quadrangle1:24000
• 1962 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1966 USGS Marion quadrangle1:250000
• 1986 USGS Mansfield quadrangle1:100000
• 1994 USGS Mansfield quadrangle1:100000

The county history of 1862 has no passage naming this settlement, which was common for the smaller places. Its township is covered in full.

The federal wildfire occurrence database lists 20 fires within 5 miles of Four Corners between 2004 and 2020, burning about 16 acres in total. None started naturally. 3 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Settlements close enough to share some of these fires:

• Amity
• Pleasant Valley (historical)
• Apple Valley
• Buckeye City
• College Hill
• Danville

Every fire recorded in Knox County

Museums hold 420 specimens collected within 10 miles of Four Corners between 1837 and 1974: 368 Animalia, 30 Fungi, 21 Plantae, 1 Protozoa. 12 distinct Species records are shown. Collected by A. Hall, A. P. Morgan, Andriessen, H. 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
	Nummularia microplaca (Berk. & M.A.Curtis) Cooke	1883	Dr. W.A. Kellerman
	Pestalotia De Not., 1841	1883	W. A. Kellermann	No locality on label
	Phyllosticta Pers., 1818	1883	Kellerman
	Notophthalmus viridescens (Rafinesque, 1820)	1837	Müller	Ohio
	Pooecetes gramineus (J.F.Gmelin, 1789)	1863	Turati (comte), Ercole
	Delphinium exaltatum Aiton	1877	E Sheets
	Hydrastis canadensis L.	1877	E Sheets
	Accipiter striatus velox (A.Wilson, 1812)	1879	Willard L. Maris
	Lobelia inflata L.	1881	Andriessen, H.	near Fredericktown, OH
	Phyllosticta pyrina Sacc.	1883	W. A. Kellerman
	Phyllosticta verbenae Sacc., 1879	1883	Prof. Kellerman
	Ramularia arvensis Sacc.	1883	Kellerman

All 420 specimens within 10 miles, at the Global Biodiversity Information Facility.

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 1062772. 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.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

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.