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A small circle inside a larger one.
Also known as: City hall symbol, Municipal office mark, Double circle symbol, Shiyakusho mark
Japanese maps use a system of circles for administrative offices, and the ring count is the administrative level: a double circle is a city hall, a single circle a town or village office, and a circle with a dot marks a prefectural office. The geometry encodes a hierarchy.
Denotes a municipal office on a Japanese topographic map, the ring arrangement indicating the administrative level.
Contexts: Maps
Encodes a hierarchy in its geometry: a double circle for a city hall, a single circle for a town or village office, and distinct forms for prefectural and national offices.
Contexts: Maps
Two concentric circles, the inner one about half the diameter of the outer, both drawn in outline.
A plain single circle is the general public-office mark, not a city hall.
A town or village office is marked with a circle enclosing a filled disc rather than a doubled circle.