公路工程是属于线型延长的工程建设项目,它们的特点是首先在国家的中、小比例尺地图上选择比较方案,然后测绘各比较方案的大比例尺带状地形图,经过纸上定线,进入地面定测,从而进行施工图设计,再进入全线施工测量。这是公路测量技术上的普遍特点。公路勘测设计一般分为两阶段进行,初步设计阶段:一般作法是沿可能的比较方案,用常规的地形测量方法测绘1∶2000或1∶5000带状地形图,在这个基础上作纸上定线,进行初步设计。技术设计阶段:经初步设计后,将最后选定的方案测设到地面上(定测), Highway engineering is a linear extension of the construction project, which is characterized by the first in the country on the small scale map to select the comparison program, and then mapping the comparative program of large-scale ribbon topographic map, through the paper alignment, enter Ground test, to the construction design, and then enter the entire line of construction measurement. This is a common feature of road measurement technology. Highway survey and design is generally divided into two phases, the initial design stage: The general approach is to map the 1: 2000 or 1: 5000 ribbon topographic maps along a possible comparison scheme using conventional topographic surveys, Line, preliminary design. Technical design stage: After the initial design, the final selection of the program measured to the ground (scheduled),