These and many other commercial free data sources use the spherical Mercator data projection (identified by European Petroleum Survey Group [EPSG] code 900913).
这二者以及很多其他的商业的免费数据源都会使用球形的Mercator数据投影（由EuropeanPetroleumSurveyGroup [EPSG]code 900913 标识）。
Lifting your astral arms free is good practise for projection. Later, you will use these astral arms to pull your astral body free of the physical.
自由地抬起你星体躯体的胳膊是一种很好的投射练习。接着，你会用星体胳膊将你的星体躯体拉出你的物质身体。
First, grating is projected on measured free surface, and height data of each point on free surface is measured by the grating projection method.
首先将矩形光栅投影在被测表面上，利用光栅投影法测量自由曲面上每点高度信息。
Optimization problem with nonlinear inequality constraints is discussed. With the help of the generalized projection, a unified algorithm model with a series of free parameters is presented.
对非线性不等式约束最优化问题进行了讨论，借助广义投影建立求解问题的一个含系列自由参数的统一算法模型。
The results show that the interference-free tool path can be generated with polar projection method and the even variable cutter axis vector can be obtained.
结果表明，极坐标投影法可以得到无干涉的五轴加工刀位数据，并可以获得均匀变化的刀轴矢量。
Using grating projection and stereo matching based on these constraints, free-form 3-D profiles can be measured efficiently and accurately.
实验表明，采用编码光栅投影视觉测量能够高效准确地测量自由曲面的三维轮廓。
Using grating projection and stereo matching based on these constraints, free-form 3-D profiles can be measured efficiently and accurately.
实验表明，采用编码光栅投影视觉测量能够高效准确地测量自由曲面的三维轮廓。
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