When a data set is brought into a map document, we will call it a layer.

当资料夹被载入地图文件，我们将称它为图层。

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The Beijing coordinate system in 1954 and the Xi 'an coordinate system in 1980 are two kinds of coordinate systems kept in the map document presently in China.

1954年北京坐标系和1980西安坐标系是我国目前地图资料中存在的二种坐标系统。

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Using data structures that don't easily map to a document tends to produce tight coupling.

使用并不能方便地映射到文档的数据结构会更趋向于产生紧密耦合。

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What's less certain is the famous Vinland map, supposedly from the 15th century, that is claimed to document their notion of its coast: studies of the map's inks and stains suggest it may well be a fake.

ECONOMIST: Modern man knows where he stands. His map tells him

The map, with its committee of cartographers, is a pretty imprecise document, but, for the first phase, it has clear demands: it calls on the Palestinians to end their violence unconditionally, and it simultaneously calls on Israel to start reopening the reoccupied areas, and to freeze all its settlement activity.

ECONOMIST: America's next challenge is Israel