【摘要】 从工程实例出发论述了几个主要技术问题:为什么要建立工程独立坐标系,工程1/40 000投影变形要求所对应的投影高差限度或横坐标限度,归算高程面低于施测高程面时的高差负投影变形与高斯平面正投影变形的联合影响,以测区平均高程面或平均经度建立工程独立坐标系的坐标改算,工程独立坐标系的建立方法,工程独立坐标系与国家坐标的换算,多个工程独立坐标系的连接。更多还原

【Abstract】 This paper introduces the reason for the creation of the engineering independent coordinate system,the projection elevation difference limits or abscissa limits according to engineering 1/40 000 project distortion requirements,the combined effects of elevation difference negative projection distortion and Gauss plane orthographic projection distortion when the reductive elevation surface is lower than the measured one,the coordinate conversion when creating the engineering independent coordinate system according to the mean elevation surface or mean longitude of the measuring area,the method for creating the engineering independent coordinate system,conversion to/from national coordinate system,and connection of engineering independent coordinate system.更多还原