双像法与单片法生成DOM的比较

数字正射影像图DOM是利用数字高程模型(DEM)对经扫描处理的数字化航空像片或高空采集的卫星影像数据,逐像元进行投影差改正、镶嵌,按国家基本比例尺地形图图幅范围剪裁生成的数字正射影像数据集。本文主要是对在全数字摄影测量系统中采用双像立体测量的方法和在普通微机上采用单片数字微分纠正的方法生成数字正射影像图DOM进行对比分析,涉及到基本原理、生产流程、质量控制、精度比较、优缺对比、应用条件等六个方面的内容,为需要使用DOM的工程单位合理选择一种方法提供参考知识。

COMPARISON OF DOM PRODCTION BETWEEN STEREOPAIR PLOTTING AND SINGLE PHOTO DIFFERENTIAL CORRECTION

Digital Orthphoto Map(DOM) is a collection of digital orthphoto data of scanned digitalizational aerial images or secondary planet images data from high altitude,of which reflection errors are rectified and enchased pixel by pixel by Digital Elevation Model(DEM),and which are cut on national basic map scale and relief map range.In this paper,applying stereopair plotting in full digital photogrammetric system and single photo differential correction on common PC in DOM production is analyzed,which involves some aspects as basic principle,production process,quality control,precision analysis,comparison of advantages and disadvantages,application condition,which provide reference for some engineering companies need DOM to choose a reasonable method.