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组合SPOT图像是由多波段和全色波段按三种不同方式组合的。其中图像D是经色度空间坐标系统变换和边缘增强处理的,在唐山城区土地利用调查中效果最好。在1:29600的图像D上能识别5个二级类型和17个三级类型。土地利用图的判读精度约90％。文中还详述了分类体系和土地利用调查的判读标志。
The combined SPOT image is a combination of multiband and panchromatic bands in three different ways. The image D is transformed by the chromaticity space coordinate system and the edge enhancement, which is the best in the land use survey of Tangshan urban area. In the 1: 29600 image D, five second-level types and 17 third-level types are recognized. The accuracy of interpretation of land use maps is about 90%. The article also detailed classification system and land use survey interpretation mark.