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采用平差理论建立了道路线状要素（如道路直线段、圆曲线和缓和曲线以及其组合曲线）数字化数据几何纠正的数学模型，并给出了衡量数字化成果质量的精度方法，对研究并解决GIS数据的精度评定和质量控制具有实用参考价值．
By using the theory of adjustment, the mathematical model of geometrical correction of digital data of linear elements (such as road straight line, circular curve and relaxation curve and its combination curve) is established, and the precision method to measure the quality of digital achievement is given. GIS data accuracy assessment and quality control with practical reference value.