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本文介绍了在地貌及土壤类型均较复杂的低山丘陵区,利用航片在概查后依中地貌为单元进行样区详查的结果。另结合立体观察,分析了各种土壤的定性特征与影响土壤判读的干扰因子。采取的土壤判读方法是从识别地貌、岩性、植被(指示植物)和土地利用类型入手,结合其他环境条件的分析,间接判读土壤至土属一级。经试验,土类、亚类与土属的定性精度依次为98.6%,92.5%及86.3%。定量(图斑界线)精度为75.3%,如扣除在航片上彼此难以准确定界的紫色土(自然土壤)与耕型紫色土图斑,则为86.6%。
This paper introduces the results of the detailed investigation of the sample area based on the mid-topography using the aerial photos in the hilly areas with more complex landscapes and soil types. Combined with three-dimensional observation, the paper analyzed the qualitative characteristics of various soils and the interference factors that affect soil interpretation. The method of soil interpretation is to start with the identification of landforms, lithology, vegetation (indicating plants) and land use types, and indirectly interpret the soil to the soil level in combination with other environmental conditions. After testing, the qualitative accuracies of soil, sub-category and soil are 98.6%, 92.5% and 86.3% respectively. The accuracy of the quantification (patch boundary) is 75.3%, as 86.6%, for example, excluding purple soil (natural soil) and cultivated purple soil patches that are difficult to accurately demarcate each other on aerial photographs.