MEASURE PRISM USED FOR THE SITE SURVEY APPLYING TRILATERATION AND RESECTION

摘要

PURPOSE: A measurement prism applying a trilateration method and a backward intersection method for a survey instrument is provided to minimize the manpower for measuring each coordinate and reduce a session for measuring because the survey instrument has a structure which can reflect lights irradiated from the survey instrument arranged in other areas at various angles. CONSTITUTION: A measurement prism(100) applying a trilateration method and a backward intersection method for a survey instrument comprises a fixing shaft part(110) and reflective part(130). The fixing shaft part is perpendicularly fixed to the grougnd(G). The reflective part has a predetermined separation angle from the center of the fixed shaft part. The reflective part comprises a plurality of reflective bodies(132) surrounding the outer side of the fixed shaft part. The reflective bodies reflect lights irradiated from the survey instrument arranged in other areas so that the reflective part is formed. The lower end part of the fixed shaft part is foldable structure. The fixed shaft part is possible to control lifting up and down.