UTM 坐标系统使用基于网格的方法表示坐标。
The UTM coordinate system is a grid-based method for specifying coordinates.
地理坐标可以用来表示任何地方的点位置,但是不适合定义具有可度量长度的直线或计算距离。
While geographic coordinates can be used to represent point locations anywhere, they are not suitable for defining lines of appreciable length or computing distances.
使用空间数据类型,开发人员可以表示使用坐标系统的数据,比如形状、线条或是地图上的点。
The Spatial data type allows developers to represent data that USES a system of coordinates, such as shapes, lines, or points on a map.
Another way to represent a point in a plane is I've got a radius and I've got an angle from the x-axis, right, and that's a standard thing you might do.
平面上面的点的方法,也就是极坐标,上面那种方法其实是,如果你们喜欢我这么说的话,笛卡尔坐标表示法。
Right, and just to get a sense of this, let's look at a simple little example, so on your hand-out, you'll see I've got a little piece of code that says assuming I've got one of these points, I want to do things with it, for example I might want to add them together.
这些数组中的一个,你怎么能够知道,它是哪种类型的呢?,你怎么知道它是以笛卡尔坐标,表示的还是以极坐标,形式表示的呢?,你没有可以用来区分的东西,你没有说明这种信息,聚集实际上的意义。
What I want to do is I want to draw a picture here, in which on the horizontal axis, I'm going to put the probability of the other guy choosing Right.
我要在这里画一张图,坐标系的横轴,表示对手选右的概率
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