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Reflector set up on radiolocated station (marked by the stake). The surveyor in the distance is using a total station to locate the station accurately

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Title: Reflector set up on radiolocated station (marked by the stake). The surveyor in the distance is using a total station to locate the station accurately

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Adding detail such as passage height and width. The tape represents the line surveyed by theodoliteUsing a total station to survey in the main chamber of Alderley Edge. The distant light is a reflector placed over a survey stationUsing a total station on the surface to set up a giro on the base line at West Mine. The giro was used underground to set a base line there
The underground transmitter for radio location. The point is found on the surface when the signal is lost - the null point.Using radiolocation on the surface to locate a signal transmitted from below groundReflector set up on radiolocated station (marked by the stake). The surveyor in the distance is using a total station to locate the station accurately
Part of the West Mine survey with passage outlines and locations of shafts. The colours represent different depths. The red and yellow lines are significant surface boundaries.

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