山区流域航空摄影关键技术探讨

Some key technologies on airphoto in mountainous valley

为了提高山区航空摄影质量,以三峡水库为例介绍了山区流域航空摄影时在航线设计、摄影作业、摄影处理、摄影时间等方面应注意的问题。并提出了解决问题的方法:山区航空摄影合理的摄影比例尺应是成图比例尺的1/4～1/6;对于山区窄而长,且为线状走势的河流宜采用带状航线设计方法设计;山区流域水分充足能见度不好,惟每年5-6月和8-10月是航空摄影的最佳季节;当地面物体反差小或能见度不好而需要特别提高反差时应配制较硬性药水冲洗等。

Some airphoto problems needed to pay attention about the flight-line design,airphoto taking,photo processing and the time suitable to take photos in mountain basin are introduced with Three Gorges Reservoir as an example.The methods for solving these problems are put forword as follows:①the method of airphoto scale rangs from 1/4 to 1/6 of map scale; ② a flight line uses belt method; ③the optional time intervals of airphoto taking are from May to June and from August to October in one year; ④when the contrast at the site is small, or the visibility is rather low and needs to enchance the contrast,the hardening agent should be prepared to process the film.