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I don’t quite understand how Google Maps‘s google.maps.LatLngBounds.isEmpty function works. What defines a LatLngBounds as being empty or not? Does LatLngBounds somehow have a record of all vectors and points on a map and check to see if any reside within the bounding box?
I am curious about this because I am working on an interface between OpenLayers and Google Maps, and there is no isEmpty method for OpenLayers.Bounds objects.
Appears to check if the bounds actually represents a valid bounds (contains at least a SW and a NE Point)
http://jsfiddle.net/k5zH9/1/