Category:Keys indicating lengths in millimetres
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Pages describing keys that indicate lengths, typically at a small scale. These keys' values are measured in millimetres (millimeters) unless otherwise specified in a unit such as metres (meters) or feet-and-inches.
The use of millimetres for these keys is a historical anomaly, and some closely related keys are expressed in the usual metres. Therefore, mappers should specify the unit explicitly as much as possible to avoid large-scale confusion.
Pages in category "Keys indicating lengths in millimetres"
The following 17 pages are in this category, out of 17 total.