The correct application and management of map coordinates?

HI,大家好。我们的团队正在制作一张超大规模的地图,在这里遇到了一些无法解决的问题。第一个问题是关于坐标,这涉及到很多方面,我们的地图的位置坐标全部归零之后无法在三视图中正确显示(或者我们不知道什么是正确的显示)如图所示。
HI everyone,Our team is making a very large map, where there are some problems that can’t be solved.First question is about the grid.which involves many aspects,We can’t preview map in three view right way after coordinates are all zero (or we don’t know what kind of preview is right,As shown in Figure).

然后由此衍生出来的问题就是,我们无法在世界构成页面中正确检阅到我们的地图,如图所示。我们就不能管理我们的地图。
The problem with this is that we are unable to review our maps in the world composition, and we cannot manage our maps right way, As shown in Figure.

这是一张大小预估超过200平方公里的超大地图,由于没有直接设置公里长宽的设置,所以我们自己设置的,参数就在下面,有什么不妥的地方吗?顺便一提,这是一张整体的地图,没有任何分割。This is a super large map, the estimated size of 200 square kilometers, we set it ourselves because there is no direct set of options about kilometers, our map the parameters are as follows. As shown in Figure.Is there anything wrong with it?by the way,this map is Integrated map without division.

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众所周知,如果地图坐标不能被开发者掌握对于后续工作而言是相当困难的,这是很基本的问题同时也是很重要的问题,我们希望你们可以帮到我们提出意见以及帮助建议。非常感谢!
As we all know, if the map coordinates cannot be completely control by developers, it is very difficult to progress for the follow-up work,This is a very basic problem, and it is also a very important issue.so we hope someone can give advice and help for us, very thank you.