fme函数速查手册.doc

FME函数速查手册 2007年11月26日 12:51 TransFORMer Brief Descrīption 简介（注意并非针对本文，可能有差异） 2DArcReplacer改为二维圆弧，圆弧的形状由参数控制，例如常数或属性值Replaces the geometry of the feature with a two-dimensional arc whose shape is set by the parameters, which can be either constant floating point values or the values of existing attributes. 改为二维圆弧，圆弧的形状由参数控制，例如常数或属性值The center x and y parameters set the origin of the arc. If these values are blank, and the input features are points, the existing feature x/y values will determine the center of the arcs. If the parameter values are blank, and the input features are not points, the operation is undefined. 中心x和y参量设置了弧的起源。 如果这些价值是空白的，并且输入特点是点，现有的特点x/y价值将确定弧的中心。 如果参数值是空白的，并且输入特点不是点，操作是未定义。 The primary and secondary axis set the radii of the arc. Note that the primary axis need not be larger than the secondary, however, the rotation angle is always measured from the x axis to the primary axis. To make a circular arc, set both the primary and secondary axis to the same value. 主要和次要轴设置了弧的半径。 大于次要，然而，自转角度从Ｘ轴总是被计量到主要轴注意主要轴不需要。 要做圆弧，设置主要和次要轴对同一价值。 The start angle controls where the arc begins, and is measured in degrees counterclockwise from horizontal. 弧开始的起动角度控制，和用左转程度被测量从水平。 The sweep angle controls the duration of the arc, and is measured in degrees. The arc will run from the start angle to the start angle plus the sweep angle. The打扫角度控制弧的期间和用程度被测量。 弧从开始将跑渔对起动角度加上打扫角度。 The rotation angle is measured in degrees counterclockwise from horizontal, and measures the rotation of the primary axis from horizontal. 自转角度用左转程度被测量从水平，并且测量主要轴的自转从水平的。 Each of the parameters may either be entered as a number, or can be taken from the value of a feature attribute by selecting the attribute name from the pull down list. 其中每一个参量也许被输入作为数字或者可以从特点属性的价值被采取通过选择属性名字从拉扯下来列出。 If the parameters for the arc are not known and need to be calculated from a linear features geometry, the ArcEstimator should be used. 如果弧的参量不知道并且不需要从一个线性特点的几何被计算，应该使用ArcEstimator。 FME Functions Use