outkeeper

noun2

1. •
   One who is responsible for maintaining a remote area.

   • This was a single dwelling, the home of one of the outkeepers. — 1910
2. •
   An attachment to a surveyor's compass for keeping tally in chaining.

   • The surveyor kept a record of the number of “outs” sometimes using a counting device called an outkeeper, which was placed on the face of the instrument . — 2000