Survey Mark

Aluminum plate with engraved cross as fixed point The measuring point has a 5/8” thread for screwing on a prism or measuring instrument. When used as a fixed point on the floor, this point should be surveyed with a prism so that if necessary, e.g. suspected moving of the fixed point due to foul play, it can be checked quickly and easily. RSFP1 is supplied with a protective cap for the 5/8” thread.