Aย total stationย (TS) orย total station theodoliteย (TST) is an electronic/optical instrument used forย surveyingย andย building construction. It is an electronic transitย theodoliteย integrated withย electronic distance measurementย (EDM) to measure both vertical and horizontal angles and the slope distance from the instrument to a particular point, and an on-board computer to collect data and performย triangulationย calculations.[1]