Calzona, California

The same ground, surveyed 74 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1911 1985

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.

• 1911 USGS Parker quadrangle1:125000, 3 printings
• 1943 USGS Parker quadrangle1:62500
• 1949 USGS Parker quadrangle1:62500, 2 printings
• 1950 USGS Parker quadrangle1:62500, 2 printings
• 1954 USGS Needles quadrangle1:250000
• 1956 USGS Needles quadrangle1:250000, 7 printings
• 1970 USGS Parker NW quadrangle1:24000, 2 printings
• 1981 USGS Needles quadrangle1:250000
• 1985 USGS Parker quadrangle1:100000, 2 printings

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 122 fires within 5 miles of Calzona between 1993 and 2020, burning about 1,239 acres in total. 4 started naturally. 6 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:

• Big River
• Desert Heights
• Earp
• Sunfair Heights
• Vidal

Every fire recorded in San Bernardino County

Regional context, not property-specific evidence. The federal mineral resources record lists 3 workings within 5 miles of Calzona: 2 occurrences, 1 prospect. None of them still produces. What was taken out: Gold, Silver, Copper. 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 San Bernardino 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 252866. 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.