摘要
公路、铁路等带状线形工程中,点位的坐标与里程、偏距具有一定的对应关系。已知里程和偏距可以计算坐标,但是在很多情况下需要根据坐标反算里程和偏距,如中线定测过程中遇到的地形、地物加桩,需现场确定出位于中线上的特征点,在公路整治以及隧道工程中也经常会遇到类似的情况。针对这些情况重点探讨了里程、偏距线形坐标与工程坐标的转换,并给出了计算示例,证明了其可行性。
In belt engineering like highway and railway, point positional coordinates correspond to their mileages and offset distances. Given the mileage and offset distance, the positional coordinates could be calculated; while, in many situations, the inverse calculation is needed. For instance, in location survey of road, several stakes should be added in special terrain and ground objects, which demands us to determine characteristic points of the central line in survey site. And the similar cases always occur in highway repairing and the tunnel engineering. In this paper, the transformations between the two coordinate systems are discussed in emphasis; and then a specific calculation is given according to an example, which also proves that the method is feasible.
出处
《地矿测绘》
2008年第3期15-17,共3页
Surveying and Mapping of Geology and Mineral Resources
关键词
线形坐标
工程坐标
坐标转换
alignment coordinates
engineering coordinates
coordinate transformation