Surveyors seems to use Gradian/gon often. There is still another circle measurement, the mil which is 6400 for one turn. But I just learned by reading the wiki

Surveyors seems to use Gradian/gon often. There is still another circle measurement, the mil which is 6400 for one turn. But I just learned by reading the wikipedia page, that there is not only the 6400 NATO mils I knew, but also 6000 Warsaw Pact mils or 6300 Swedish "streck"