摘要
国产X—3视差测图仪已被广泛用于土地利用现状图的测制中。然而,高原山区具有高差大,航片航向重迭度高和像片基线长度≤45mm的特点,采用常规方法测图,必须隔片建立立体模型,并且精度差,工效低,适用范围受限。改进方法是右盘像片沿X轴向左平移b′毫米,变一张像片二次高程定向为一次定向,并完成跟踪转绘,从而使测图精度和可测高差范围提高一倍,测图工时减少40％,也扩大了适用范围。
Internal X—3 parllax instrument has been widely used for mapping of current situation of land use. However applying scope is Limited when the common methods are used for the mapping of current situation of land use because of great elevation difference, 75% edge overlapping of photos and less than 45 mm photo base line. And also stereo-model must be set up. The improvement of common method is to move along x axle b' mm of the right plate photo to left, change two-time direction fixation of elevation for each photo to one time and immedatedly finish stereophoto grammetric compilaticn. The precision of map measurement is doubled and so is the measurement of elevation difference. The time required for map measurement can be deduced 40% and the applied scope will be widened.
出处
《四川农业大学学报》
CSCD
1990年第4期379-382,共4页
Journal of Sichuan Agricultural University
