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OL3-ext: Overview map control

The ol.control.Overview create an overview similar to the ol.control.overview.
The main differences is that you can limit the zoom level on the overview and force the overview to be oriented north. Click on the overview map to move the center of the map to that point. The elastic option move the map with an elastic animation.
External overview
Zoom min:
Zoom max:
Layer:

Position: