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本文采用1/10,000和1/50,000航测地形图(以下简称航测图),1/33,000—1/38,000(简称1/33,000)航背及实测(拐沟)沟道图,分别量算杏子河流域最大的23条小流域、纸坊沟小流域及拐沟的沟道切割密度。以实测值为100%,则前三种航测资料的量算值与实测值之比,依次为98%、46%、96%。结果表明,1/10,000航测图量算值,接近于实测值,可作为该区量算切割密度的最佳底图;1/33,000航片的量算值,加上修正值+4%,接近1/10,000航测图量算值,可作该区的补充底图;1/50,000航测图的量算值,小于实测值的50%,不宜作该区量算沟道切割密度的底图。
In this paper, 1 / 10,000 and 1 / 50,000 aerial topographic maps (Aerogram) and 1 / 33,000-1 / 38,000 (1 / 33,000) aerospace and actual The maximum of 23 small watershed, the small watershed of Zhafanggou and the channel ditch density. The measured value of 100%, the first three kinds of aerial survey data measured value and the ratio of the measured values, followed by 98%, 46%, 96%. The results show that the 1 / 10,000 aerogram is close to the measured value, which can be used as the best base for calculating the cutting density in this area. The calculated value of 1 / 33,000 aeronautics plus the correction value + 4% The figure of 1 / 10,000 aerogram can be used as supplementary base map of the area; the figure of 1 / 50,000 aerogram is less than 50% of the actual value, it is not suitable for the area to calculate the channel density of the base map.