LatLngBounds extend bug?

[DiTieM]

Just got this simple test case:

    var bounds = new google.maps.LatLngBounds( ) ;

    

    bounds.extend( new google.maps.LatLng( -34,  -56 ) ) ;

    bounds.extend( new google.maps.LatLng(  34, -118 ) ) ;

    bounds.extend( new google.maps.LatLng(  25,  121 ) ) ;

    console.log( [ bounds.getSouthWest( ).lat( )

                 , bounds.getSouthWest( ).lng( )

                 , bounds.getNorthEast( ).lat( )

                 , bounds.getNorthEast( ).lng( ) ] ) ;

I might be totally wrong, or missing something, but I would expect to get a bounding box like:

[-34, -118, 25, 121]

(The order is (SW-lat, SW-lng, NE-lat, NE-lng)

But I get this (from google maps)

[-34, 121, 34, -56]

Is this a bug or someone can explain this to me?

Thanks a lot,

  David

[Ben Appleton]

This is because longitudes wrap around at -180 = 180 degrees. Focusing just on the longitudes:
1 - First you add the point -56
2 - Then you add the point -118. The bounds are now [-118, 56].
3 - Lastly you add the point 126. The smallest bounds containing 126 and the previous bounds is [126, -56], which crosses 180 as you observe.

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[DiTieM]

Thanks a lot! It makes sense now. Pity I had to learn this in the painful way.

Regards,

  David