论述了制订面向GIS数字地图标准的必要性和紧迫性,探讨了面向GIS数字地图的特点,最后提出了一种面向GIS数字地图的数据结构。
This thesis deals with the necessity of establishing the standards of the digital map of GIS, discussing the characteristic and brings about a data structure of the GIS-oriented digital map.
like you see on a map. That's where GMT is, GMT+0 is at that point.
好像你看一幅地图。那里就是格林威治标准时间,GMT+0就是在那一点上。
应用推荐