成图比例尺 meaning in Chinese

preset scale

In the course of making , it is given a formula of accuracy estimation . by using the formula , it estimated accuracy of image map . and the result examined shows , this formula accords with the actual conditions
在制作过程中，提出了一个利用原始影像比例尺、成图比例尺、扫描分辨率进行精度估算的公式，并用该公式对制作的影像地图的精度做出预计，检验的结果表明，该公式符合实际情况。
The methods for solving these problems are put forword as follows : the method of airphoto scale rangs from 1 / 4 to 1 / 6 of map scale ; a flight line uses belt method ; the optional time intervals of airphoto taking are from may to june and from august to october in one year ; when 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
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。