VigilX与常用的地形数据库兼容。
It has been designed to be compatible with commonly used terrain databases.
包含着很多多边形，但是这些多边形大多永远被排除在视野以外，对于一个大型数据库，就像地形数据库来说是很重要的。
This can be very important for large databases that contain may polygons, most of which will not be in the field-of-view at any one time such as a terrain database.
因此将CAD地形数据导入GIS数据库，是数据加工生产厂商的当务之急。
Therefore, it becomes an urgent matter for the data processing manufacturers to input CAD terrain data into GIS database.
该数据库在上星期进行了更新，它含有美国宇航局提供的大量地形数据，未来还将覆盖更多的地形，涉及田园，荒地等。
This database renewed last week. It contains a large amount of landscape statistics provided by NASA. It will cover more kinds of landscape including farmland, wasteland, etc.
该数据库在上星期进行了更新，它含有美国宇航局提供的大量地形数据，未来还将覆盖更多的地形，涉及田园，荒地等。
This database renewed last week. It contains a large amount of landscape statistics provided by NASA. It will cover more kinds of landscape including farmland, wasteland, etc.
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