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为了加速实现农业现代化,全国正在开展第二次土壤普查工作,借此机会介绍一下有关编制公社及大队一级土壤图(即社队土壤图)的几个技术设计方面的问题。 一、成图幅面和比例尺的确定 地图的比例尺、制图区域的实际范围和成图的图幅大小,三者有着密切的联系。制图区域的范围大小与成图幅面的大小受到地图比例尺的制约;而地图幅面的大小又同合理地使用纸张相联系。根据过去作图的经验,一般认为利用一张全开大小的纸张绘制公社土壤图时,大部分比例尺都可以在1∶2.5万上下。在山区或边缘地区作土壤调查时,由于这些地区的公社面积较大,若用一张全开纸来绘图,比例尺可能小到1∶10万或更小,由于底图上的地理要素内容稀小,这种比例尺是许可的。综上所说,用一张全开大小的绘图纸来绘制公社土壤图是比较适宜的。至于生产大队
In order to speed up the modernization of agriculture, the second national soil census is being conducted across the country to take this opportunity to introduce several technical design issues concerning the preparation of a soil map at the commune and brigade levels (ie, the soil map of communes and brigades). First, the map format and scale to determine the scale of the map, drawing the actual area of the map and map the size of the map, the three are closely linked. The size of the drawing area and the size of the drawing format are governed by the scale of the map; and the size of the map format is associated with the proper use of paper. Based on the past experience of drawing, it is generally considered that most of the scales can be made up to down to 1: 25,000 when using a full-size paper to draw the soil map of the commune. When conducting soil surveys in mountainous or fringe areas, the scale of communes in these areas may be as small as 1: 100,000 or less due to the size of a commune in the area. If the geographical elements on the base map are sparsely populated, This scale is permissible. To sum up, it is more appropriate to draw the commune soil map with a full-size drawing paper. As for the production brigade