高等级公路的线型以曲线为主体,这种曲线不是一般的小半径短曲线,大多是大半径长曲线,有时一个曲线可长达几百米至几公里。如果用测量三级公路的方法去测量,往往进度慢、质量差。笔者会同几个同志在测设北京、河南某些二级公路时,试用木质横基尺视差法测距,实践证明,对长曲线的敷设较为适用,可大大减轻劳动强度,对拉链者是个“解放”,并减少了外业测量的窝 High-grade highway line to the curve as the main body, this curve is not a general small radius of short curves, mostly large radius long curve, and sometimes a curve up to several hundred meters to several kilometers. If you measure the three-way highway to measure, often slow progress, poor quality. In conjunction with a few comrades in measuring Beijing, Henan, some of the secondary roads, the trial of wooden cross-base disparity ranging method, the practice proved that the application of long curves more applicable, can greatly reduce the labor intensity of the zipper who is a “ Liberation ”and reduce the nest of field measurement