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高山峡谷地区水利水电工程大比例尺测图,用平板仪困难较大,习惯采用经纬仪配合半圆仪测图,这种方法,操作简便,但成图精度不如大平板测图高。近两年来,我们探索用卡西欧602P 计算器计算碎部点的直角坐标,用直角坐标点成图,取得了较为满意的结果。现简介如下:(一)直角坐标展点的工具及要求展点的主要工具有:60厘米长的有机玻璃直尺一根,30～35厘米多用斜边三角尺一个,卡夹两个,卡西欧622P 计算器一台。直尺和三角尺的刻线,要用线纹米尺进行检验。直尺刻线误差,全长不宜超过0.2毫米,三角尺刻线及直尺分米刻线误差不超过
Large-scale mapping of water conservancy and hydropower projects in the mountainous gorge area is more difficult to use with the flat panel instrument. It is customary to use theodolite with the semi-circle measuring map. This method is easy to operate, but the mapping accuracy is not as high as that of the large flat panel. In the past two years, we have explored the Cartesian 602P calculator to calculate the Cartesian coordinates of the fractal points and plotted Cartesian coordinates points to obtain satisfactory results. Are briefings are as follows: (A) Cartesian coordinates of the exhibition site tools and requirements The main points of the exhibition are: 60 cm long plexiglass straightedge, 30 to 35 cm more with a beveled triangular ruler, clip two, Casio 622P calculator one. Straightedge and ruler ruler, use the ruler to test. Ruler scribing error, the total length should not exceed 0.2 mm, ruler ruler and ruler sub-meter marking error does not exceed