The outlining curve of an isometric polygon is one of the un-rounded curves, it is difficult to measure its parameters and calculate the errors. 摘要等距型面輪廓曲線(xiàn)為非圓曲線(xiàn)的一種，對其參數的測量和誤差的計算比較困難，目前尚沒(méi)有統一的評價(jià)標準。
There are many methods to measure the circular curved line in circuitry construction survey.Angle offset method and tangent offset method are usually used. 摘要在線(xiàn)路施工測量中，圓曲線(xiàn)測設方法有很多，通常采用偏角法或切線(xiàn)支距法。
