This technique may be likened to placing map overlays on top of each other on a light table.

这个技术也许被比作对安置地图叠盖在彼此顶部在一张轻的表格。

youdao

You can also easily attach different components (markers, information texts, controls, ground overlays, polygons, polylines) to the map.

您还可以轻松向地图添加几个不同的组件(标记、信息文本、控件、地表覆盖、多边形、多段线)。

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You could also easily attach different components (markers, information texts, controls, ground overlays, polygons, and polylines) to the resulting map.

您也可以方便地将不同的组件（标记、信息文本、控件、地面叠加（ground overlays）、多边形和折线）添加到结果地图中。

youdao

Here, you'll find the ability to view map overlays from multiple carriers, along with the ability to zoom into a street-level view.

ENGADGET

As the name implies, it overlays photos with a map underneath, giving people a far more visual look at what they were seeing at a given point on Earth (or Mars, assuming Curiosity hasn't reached its data limit this month).

ENGADGET: Instagram 3.0 adds Photo Maps, infinite scrolling and speed improvements (video)