Construction Technology of Slab Type and Sleeper Type Ballast less Track in Turnout Area
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2.3 The Survey Coordinates Conversion for Datum Mark and Angular Point

According to the geodetic coordinates of turnout public points provided by design,the partial coordinates of all feature points on design drawings shall be converted to the geodetic coordinates the same as other points on the track,it shall be carefully inspected and reported to the supervisor for reinspection,once qualified,it shall be used for construction setting out and turnout slab fine adjustment.