用对比的方法着重分析了提高测图精度的原因，并对DM 502红外测距仪的反射镜安置方法作了较详细的叙述。文章后谈到了DM 502红外测距仪测绘地形的优点。
Through comparison it is mainly discussed why the accuracy of mapping can be improved using DM502 as well as how to set the reflector related to DM502.
航摄旋偏角对测图定向精度的影响随着处理技术手段的变换而改变，也随着比例尺由小变大而改变。
The effect of aerial photographic swing angle to the orientation precision of digital photogrammetry changes with the processing technical methods and the size of map scale.
其中内业立体测图的方式和方法是提高精度的关键，它关系着整个工程的进度和质量。
In the industry of stereo mapping the way and the method is the key to improve the accuracy, which is related to the progress and quality of the whole project.
用轴测投影图与球面三角相结合求解空间角度，具有精度高和解题迅速的特点。
Axonometric drawing and spherical triangle combined to solve space Angle has the characteristic of high precision and produces rapid solution.
数字测图具有精度高、用时短、操作简便等优点。
The digital surveying and mapping has the advantage of high precision, short time, easily operating and so on.
重力测量中最大的困难就是取得高精度的地形图以及确定每一测点的精确位置。
The biggest difficulties in gravimetric observations are to get a first class map and the exact location of every measurement.
对采用坐标展点器展绘碎部点坐标所测绘的大比例尺地形图的精度进行了系统地分析，并定量地给出了采用不同测距方式展点测图的点位中误差。
The precision of a large scale topographic map is systematically analyzed, which is measured and drawn with the help of coordinate point distributor for the distribution of the detailed points.
介绍了一种地形图的套合修测方法及其作业步骤，并对其精度作了论证。
This paper introduces a method of topographical maps adjustment revise and its work steps, prove its form accuracy.
简述全站仪的构成及测设图根控制点的基本原理，分析布设图根控制点的测量精度并得出结论。
The form of electronic total station and the basic principle of determining and setting up root control points were related briefly. The accuracy of setting up root control points was analysed.
结合生产实践，从影响成图精度的几种因素的估算方法入手，比较分析了全数字化测图仪器同模拟测图仪器之间的精度差别。
According to the main factors which affect the mapping precision, it is shown that difference between the digital photogrammetry mapping and analog photogrammetric plotting is comparatively analysed.
结合生产实践，从影响成图精度的几种因素的估算方法入手，比较分析了全数字化测图仪器同模拟测图仪器之间的精度差别。
According to the main factors which affect the mapping precision, it is shown that difference between the digital photogrammetry mapping and analog photogrammetric plotting is comparatively analysed.
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