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Public-images-osm logo.svg clacks_overhead
Osm element key.svg
Messages in the Clacks Edit or translate this description.
Used on these elements
should not be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations
Status: in use


clacks_overhead is a changeset tag, a way to store data in the OSM editing system.

It is a reference to the  Discworld series of books, in which characters encoded messages in the clacks as a way to honor the dead.

Known values include clacks_overhead=GNU Terry Pratchett to remember  Terry Pratchett.

The JOSM plugin pTerry will automatically add this tag to all changeset you upload.

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