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A cogwheel in outline.
Also known as: Factory mark, Cogwheel symbol, Industrial site symbol, Gear on a map
Japan marks factories with a cogwheel, and the GSI removed the symbol from its standard 1:25,000 series in 2013 because industrial sites had become hard to identify reliably from aerial survey. It survives on older sheets and in other GSI products.
Denotes a factory on a Japanese topographic map, drawn as a toothed cogwheel in outline.
Contexts: Maps
Was discontinued from the standard 1:25,000 series in 2013 because factories had become difficult to identify reliably from survey imagery, and remains on earlier sheets.
Contexts: Maps
A circle with regular square teeth projecting from its circumference, drawn in outline with a small central hole.