At this point, you have a fully functional map pulling data in from multiple sources, including default functionality to pan with the mouse and zoom in and out with the mouse wheel.

此时，您就拥有了一个完全可以发挥作用的地图，可从多个资源拉入数据，包括默认的用鼠标平移以及用鼠标滑轮缩放的功能。

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By default, OpenLayers provides mouse wheel-based zoom in and out and mouse-based panning. You can also add on-map controls - for example.

默认地，OpenLayers提供基于鼠标滑轮的缩放以及基于鼠标的平移功能。

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Now that the map is functional, you can zoom the map to your area of interest, rather than leaving it zoomed out to the entire United States.

地图已经可以发挥作用后，现在就可以将地图缩放到您感兴趣的区域，而不是让地图保持缩小于整个美国。

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Use the map controls in the bottom left corner to zoom in and out and move about, or you can use your mouse point to draw a square and zoom in on a specific area.

BBC: Netvibes website