That is the real value of the z dimension: You can create objects in any order you choose and position them relative to each other by adjusting the z value on each object.
这就是 z 值的实际价值：您可以按照任何顺序来创建对象，并可以通过调整每个对象的 z 值来调整彼此之间的相对位置。
2
The space filling Z-order curve might not be the best choice for geodetic data, given the closed nature of the earth's surface.
对于大地数据，由于地区表面具有封闭的特性，因此空间填充z顺序曲线可能不是最好的选择。
3
First, z practitioners were asked to examine each RUP phase and identify any necessary changes to its main objectives and deliverables, in order to accommodate the specific needs of the z environment.