一、超小比例尺象片的林地和非林地类型的判读。该试验是以1:420,000比例尺的高空摄影红外彩色象片对于13种林地和非林地类型的判渎精度进行测定。试验在乔治亚州亚特兰大附近,摄影象片覆盖着8个41平方公里(16平方哩)的试验区,以夏初夏末和冬末三个季节代表着为期十个月一个的航摄周期。三个判读者所试验的象片是利用投影观察器放大了十三倍。就平均数而言,在冬季摄影的象片上,三个判读者能正确分类的占全部森林样点的97%。 First, ultra-small scale footage of woodland and non-woodland interpretation of the type. The test was based on a 1: 420,000 scale aerial photography of infrared color images of 13 woodland and non-woodland types of judgment. Test Near Atlanta, Georgia, the photographic image covers eight 41-square-kilometer (16-square-mile) pilot areas that represent a ten-month aerial photo shoot cycle in late summer and late winter. The images examined by the three interpreters were magnified thirteen times using a projection viewer. As far as the average is concerned, on the images of winter photography, 97% of the total forest samples correctly sorted by the three interpreters.