Unionville, New York

The same ground, surveyed 86 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1908 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.

• 1908 USGS Potsdam quadrangle1:62500, 7 printings
• 1943 USGS Potsdam quadrangle1:24000
• 1943 USGS Potsdam quadrangle1:31680
• 1948 USGS Ogdensburg quadrangle1:250000, 2 printings
• 1951 USGS Ogdensburg quadrangle1:250000
• 1953 USGS Ogdensburg quadrangle1:250000
• 1961 USGS Ogdensburg quadrangle1:250000
• 1964 USGS Potsdam quadrangle1:24000, 3 printings
• 1985 USGS Massena quadrangle1:100000
• 1994 USGS Massena quadrangle1:100000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 155 fires within 5 miles of Unionville between 1997 and 2020, burning about 282 acres in total. 11 started naturally. 27 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:

• Hewittville
• Sisson
• Norwood
• Potsdam
• North Stockholm
• Slab City

Every fire recorded in St. Lawrence County

Regional context, not property-specific evidence. The federal mineral resources record lists 6 workings within 5 miles of Unionville: 5 past producers, 1 producer. 1 still produces. What was taken out: Stone, Crushed/Broken, Sand and Gravel, Construction, Limestone, General, Dolomite. 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 St. Lawrence 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 977164. 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.

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.