文章从目前交通运输业的飞速发展、线路工程建设的需要、平面圆曲线测设放样的需要出发，对平面圆曲线的测设放样原则和原理进行了阐述。比较分析了平面圆曲线测设放样的直角坐标法、极坐标法和偏角法的原理、方法和优缺点及各自选择和实现的条件与环境。最后指出选择何种方法必须因地制宜，在满足建设单位要求的同时，根据主客观因素的限制和制约来选定，并在工程测设放样的实际中做到灵活变通，以高效和顺利完成测设任务。%Aim on the current rapid development and necessary of transportation and line construction projects ,for need of measure plane circular curve,the article expounded the principles of measure plane circular curve. Comparative analysis of the principle of law and declination and environment and the method and the advantages and disadvantages of their own choosing for cartesian coordinate measure and polar coordinates of measure and angle coordinates of measure. Finally point out that the choice of method must be adapted to local conditions ,to meet the requirements of the construction unit at the same time ,according to the limitations and constraints of objective and subjective factors to selecting and surveying to stake out the actual project to be able to do flexible ,and efficient survey the successful completion of the task.
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