【摘要】 通过比较黄甫川地区1∶5万比例尺和1∶25万比例尺的坡度图,对其误差进行定性分析和定量研究,得到这2种比例尺生成的坡度的相关关系为:y=0.004 3+6.911 9x-80.78x2+327.408x3,同时计算了农牧交错带和黄甫川两地的地形指数关系:q=-0.007 6+1.617 7p-1.091 5p3,在消除地形差异的基础上推出整个农牧交错带的坡度,实现了同一地区不同比例尺之间的坡度转换,大大提高了小比例尺坡度的精度,为国家退牧还草工作提供了理论依据.更多还原

【Abstract】 The eco-environment of farming-pastoral zone in northern China has been seriously deteriorated.It is the urgent time to preserve the vegetation,for which the exact data set of slope is the most important.The precision of slope generated by two different scales is compared.The conclusion is that the relationship of slope under the two scales can be expressed as y=0.004()3+6.911()9x-80.78x~2+327.408x~3,and the relationship of slope in two different place can be expressed as q=-0.007()6+1.617()7p-1.091()5p~3.The conclusion can be applied to other places,which will greatly improve the efficiency of vegetation restoration.更多还原