Virtual Earth / Bing Maps - How To Calculate Best Zoom Level?

If you are using the javascript version, then you don't need to calculate it, you can directly give the array of VELatLong objects to VEMap. SetMapView and it will center + zoom so that all pins are visible.

When I had similar problem I solved it with calculating (rough) center of mass for the pins. I say "rough" because I just averaged out the lat/lon for each point and that's not correct as the Earth is a sphere.

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