Ivan-Malin
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| /** | |
| * Calculates the zoom level for the StreetWatchMap using the formula given by a Google employee (maps team) | |
| * in https://groups.google.com/d/msg/google-maps-js-api-v3/hDRO4oHVSeM/osOYQYXg2oUJ. For simplification | |
| * the formula has been duplicated and simplified below | |
| * | |
| * R = RequestedMeterRadius | |
| * S = MinScreenSizeInDp | |
| * B = BaseMetersPerPixel (for the type of map) | |
| * L = Latitude (Center of focus) | |
| * Z = ZoomLevel |