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。
A new mapping tool-video-plotting system has appeared by combining microcomputer with photogrammetry.
微型计算机与摄影测量相结合，出现了一种新的测图工具——视频测图系统。
Aerial photos are the basis of the full digital photogrammetry and directly affect the quality of mapping, therefore, aerial data should be carefully checked and accepted.
航摄像片是全数字摄影测量的重要依据，直接影响成图质量，必须认真进行航摄资料的检查验收工作。
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